How to delay a discrete signal in matlab

How to delay a discrete signal in matlab. Select a Web Site. 005 seconds. Y ( z) = b ( 1) + b ( 2) z − 1 + + b ( n + 1 About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The Pulse Generator block generates square wave pulses at regular intervals. May 18, 2012 · freq = 0:Fs/length (x):Fs/2; fprintf ('Maximum occurs at %3. Copy Command. Use grpdelay to determine that the delay is half the filter order. If the number of sections is less than 2, the function considers the input to be a numerator vector, b. Here the Sampling_Frequency is equal to 200Hz, therefore the Sampling_Period = 1/Sampling_Frequency; which equals 0. 5 seconds (sample 500). 9 5 . In the OP’s construct all symbols used should have equal weight toward the correlation determination; for example, the symbol "1" matching symbol "1" should carry just as much weight as symbol "6" matching symbol "6", but in the cross correlation this would contribute 36 to the result while the former The Discrete Impulse block generates an impulse (the value 1) at output sample D+1, where you specify D using the Delay parameter ( D ≥ 0 ). 5 ms). All output samples preceding and following sample D+1 are zero. The Unit Delay block holds and delays its input by the sample period you specify. shifted_data = delayseq (data,delay) delays or advances the signal in data by the number of samples specified in delay. m file) in Matlab. The Variable Integer Delay dialog box opens. To time shift any discrete or continuous signal in Matlab, simply open and create a new Script (. Feb 12, 2013 · Understanding delaying or advancing a discrete time signal. The Discrete Transfer Fcn block implements the z -transform transfer function as follows: where m+1 and n+1 are the number of numerator and denominator coefficients, respectively. x = hilbert (xr) returns the analytic signal, x, from a real data sequence, xr. 5 to generate a standard triangle wave. Jul 21, 2017 · this code allows you to enter the value you desire to shift the continuous time and discrete time signals that have already been hard coded and graphed. Each structure takes one or more inputs. I am trying to understand this intuitively. This block is equivalent to the z -1 discrete-time operator. In other words, ZOH and Unit Delay operate on the 'x' (time) axis of the signal y = chirp (t,f0,t1,f1) generates samples of a linear swept-frequency cosine signal at the time instances defined in array t. Left shift. g. Note that the filtered output is delayed by about twelve hours. For instance, simulate the system response to a sine wave with period of 1 s and a duration of 4 s. When you enter a value of zero for the Delay parameter, any initial conditions you might have entered have no effect on the output. Feb 6, 2013 · For my project I need to generate a sine wave using matlab which has 100 000 samples and the frequency changes randomly after every 10 000 samples. Hot Network Questions Mar 12, 2019 · You can also calculate the DT's system's output via the difference equation given by your lecturer (which you did). The generated square wave has a value of 1 for intervals [ n π, ( n + 1) π) with even n and a value of - 1 for intervals [ n π, ( n + 1) π) with odd n. The instantaneous frequency at time 0 is f0 and the instantaneous frequency at time t1 is f1. The discrete fourier transform (DFT) can be computed by MATLAB though and it uses an efficient algorithm called the fast fourier transform (FFT) which runs on the order of NlogN time, where N is the length of the signal. Most linear analysis commands can either Description. The Zero-Order Hold block models the effect of sampling Dec 5, 2020 · The first task would be to create a vector t that has separated by the Sampling_Period. u ( t n − 1) is the block input at the previous time step. 1 s. If xr is a matrix, then hilbert finds the analytic signal corresponding to each column. A discrete signal will be denoted by x(n), in which the variable n is integer-valued and represents discrete instances in time. Jan 1, 2011 · It is useful for filtering out high frequency noise for small n. u ( t n) and y ( t n) are the block input and output at the current time step, respectively. In this example, since the input to the Delay port is 3 and the sample period at the In and Delay ports is 1 then the sample that arrives at the In port of the block at time t = 0 is released to the output at time t = 3. Signals in a model except bus signals and blocks that output constant value. sos is a K-by-6 matrix, where K is the number of sections and must be greater than or equal to 2. Theme. Subtract and scale to geds by dividing by pi and multiplying by 180. H = tf([1 -1],[1 4 5], 'InputDelay', 0. Method 2: The transfer function is a basic Z-domain representation of a digital filter, expressing the filter as a ratio of two polynomials. – Mouse On Mars. y = chirp (t,f0,t1,f1,method) specifies an alternative sweep method option. The Bessel filter has approximately constant group delay along the passband. 1, reveals that all signals consist Apr 12, 2017 · How to plot the periodic signal using MATLAB. Assume that u is the input, y is the output, and x is the state. 3 s. Here you have more information. Means I am doing some thing 'quickly' as compared to Variable-Size Support. How can I plot the summation of several variables? 0. Generate a square wave with a period of 2 π. It is the principal discrete-time model for this toolbox. Taking angle (U1) and angle (U2) gives you their phase in rad. Integration and Accumulation Methods. While these two methods look similar, they can give different results due to floating point round-off. To specify an initial value, use the Model Explorer or MATLAB ® commands to do the following: Create the signal object. Sorted by: 1. x = hilbert (xr,n) uses an n -point fast Fourier transform (FFT) to compute the Hilbert transform. num can be a vector or matrix, while den must be a vector. The code for the signals are thus: Jun 12, 2020 · I was trying to solve the Z-transform for u[n] - u[n-N], where u[n] means discrete unit step function, and N is some finite integer. The type of delay determines the actions you have to take to compensate for it. My observation is in the signal I am subtracting time in x [n-k], by k units. 0 Comments. But the important thing to notice is that the delayed signal has same length as that of original signal so if you This block accepts continuous and discrete signals. When D is a length- N vector, the block generates an M -by- N matrix output representing N distinct channels, where you specify frame size r = xcorr (x,y) returns the cross-correlation of two discrete-time sequences. Cross-Correlation of Delayed Signal in Noise. At the start of simulation, the block outputs the Initial output parameter until the simulation time exceeds the Time delay parameter. 4. When placed in an iterator subsystem, it holds and delays its input by one iteration. ^2); plot(z) Determine the envelopes of the sequence using the magnitude of its analytic signal. dt = t(2)-t(1); vdrift = filter(d,drift)/dt; The filtered signal is delayed. In this example, export the filter as an object. figure. As you can image, if the input data is slightly behind or before the step taken by the solver, a data point can be Time Shifting in MATLAB (Code + Output) You can do Time Shifting in Matlab with Discrete as well as Continuous signals. An analog signal will be denoted by x(t), in which the variable t can represent any physical quantity, but we will assume that it represents time in seconds. structure(input1,) returns a discrete-time filter, Hd, of type structure. Learn more about convolution . The locations of the maximum values of the cross-correlations indicate time leads or lags. In Matlab, the signal x(t + τ) is given by: [0,, 0, x(1),, x(N)]. Measurement uncertainty and noise sometimes make it difficult to spot oscillatory behavior in a signal, even if such behavior is expected. Use the cross-correlation sequence to estimate the phase lag between two sine waves. In particular, I need to calculate the value that the first derivative of the signal assumes at a specific istant time (in addition to the values that the starting signal assumes, I also have the sampling frequency and a vector with the associated time instants). You can also extract system characteristics such as rise time and settling time, overshoot, and stability margins. m file, and it works for getting a correct delay tau (on simulated sinusoidal signals). Signal Compr The signals have different arrival times. Method 1 : Taking z- transform using time-delay property and keeping in mind that delta[n] has z-transform = 1; I get: which suggests that ROC is |Z| > 0. The length of Y automatically determines the position of each stem on the x -axis. Cross-Correlation of Phase-Lagged Sine Wave. This system has an input delay of 0. If there some good reason why you can't use the inbuilt, you can use a convolution instead. The wave never has a value of 0. y = resample (x,tx) resamples the values, x, of a signal sampled at the instants specified in vector tx. Simulink Discrete and Fixed-Point Blockset Delays & Holds. Thus, autocorrelation can help verify the presence of cycles and determine their durations. Digital filters introduce delay in your signal. Feb 9, 2012 · As explained in technical solution 1-1ITHX9, Simulink computes time using the following equation: time = stepSize * [0:N]'. 5:-1/100:-2. Then to filter the signal in MATLAB type: filteredSignal = conv (mySignal,myFilter). The transfer function model description for the Z-transform of a digital filter's difference equation is. 49; z = airy(t10). The Simulink ® Scope block and DSP System Toolbox™ Time Scope block display time domain signals. Normalize the x -axis by π. In matlab if you want to generate a periodic signal there many methods one of them is : %x is array that represent discrete time signal. Hd = dfilt. s (1:end+shift) = x (-shift+1:end) ie, s (1,2)=X (4,5) so shifted output will be s= {4 5 0 0 0} Hope this makes sense. 3); Hd = c2d(H,0. Linear and Circular Convolution. A delayed unit sample has the expression. The signal's energy extends up to 400 Hz. 005 seconds (sample 1) to 2. Examination of a discrete-time signal's plot, like that of the cosine signal shown in Figure2. The grpdelay function allows you to look at the filter delay as a function of frequency. Get. The Chebyshev Type I and elliptic filters roll off faster but have passband ripple. Delay a 1 kHz cosine signal by an integer number of samples. The Discrete-Time Integrator block allows you to. For frame-based processing, signal dimensions of the data input port u cannot be larger than two. By default, the sine wave object generates only one sample. The block accepts one input and generates one output, which can be either both scalar or The model has input delay τ i, output delay τ o, and internal delay τ. δ(n) = 1 if n = 0 δ(n) = 0 otherwise δ ( n) = 1 i f n = 0 δ ( n) = 0 o t h e r w i s e. Jun 13, 2019 · Hi, everybody. By default, c2d converts the time delays to pure integer time delays. The Scope is optimized for general time-domain simulation. This vector should run from 0. The filtered signal has its values shifted by the latency number of samples. x(t + τ) is a forward delay, so it's actually [x(τfs),, x(N)] Discretize the following continuous-time transfer function: H ( s) = e - 0. Time Delay shifted_data = delayseq (data,delay) delays or advances the signal in data by the number of samples specified in delay. Noninteger values of delay represent fractional delays or advances. If your D is an integer multiple of the sampling frequency, then all you need to do is adding 0 in front of the signal. What would be the effect e. If we want to shift this function to the left by three points, shift=-3 i. SineWave creates a sine wave object that generates a real-valued sinusoid with an amplitude of 1, a frequency of 100 Hz, and a phase offset of 0. We can delay a discrete-time signal by an integer just as with analog ones. transfer function if I delay the rising edge of the pulse by 1 delay as above, but the falling edge would be delayed by 2 samples? The signal then would be: 0,0,1,1,1,1,1,0,0,0. Cross-correlation measures the similarity between a vector x and shifted (lagged) copies of a vector y as a function of the lag. Under Frequency Specifications, set Units to Hz, Fs to 1000, and Fc to 150. Setting Initial condition to a scalar value of 0. This is due to the fact that our moving average filter has a delay. Double-click the Variable Integer Delay block. The following figure shows the general result of discretizing G ( s ) using the Tustin method. has been critically sampled) has a sampling rate of 800 Hz. How to sum individual elements MATLAB. Following that, if you do the following you will get the result you are looking for: This video is designed for beginners of digital signal processing using Matlab Dec 21, 2020 · In this video, we will show how to visualize a time scaled version of a signal in MATLAB. You should use the next command: Theme. We can account for this delay manually. I solved this using 2 methods. The following diagram shows how each parameter affects the waveform. t = linspace(0,3pi)'; x = square(t); Plot the square wave and overlay a sine. Nov 15, 2011 · 2. Nov 24, 2014 · I have the output of a time series y(t) which is a vector for t = 1,2,m denoting the number of data points. Copy. A time delay is added when a transition is detected in the input signal. temp=x'ones(1,n); y=temp(:); % where x' is transpose of x. Positive values of delay delay the signal, while negative values advance the signal. Compensate for it by discarding samples. To represent integer delays in discrete-time systems in MATLAB, set the 'InputDelay' property of the model object to an integer value. example. The sawtooth wave is defined to be –1 at multiples of 2 π and to increase linearly with time with a slope of 1/ π at all other times. x = sawtooth (t,xmax) generates a modified triangle wave with the maximum location at each period controlled by xmax. The block accepts one input and generates one output. . Y = linspace(-2pi,2pi,50); stem(Y) Data values are plotted as stems extending from the baseline and terminating at the data value. Delay a signal one sample period. Looking After the Delay block delays the bus by three sample periods, the Bus Selector block separates the bus back into the two original signals. 2 The unit sample. The input data is zero-padded or truncated to length n, as appropriate. H ( z ) = z - 2 5 2 z - 0 . 005; signal = cos(2pi1000t)'; Set the delay to 5 samples (0. The Discrete Derivative block computes an optionally scaled discrete time derivative as follows. For fractional delays, the function interpolates between samples. By default, impulse applies an input at time t = 0. sine = dsp. If the input is non-scalar, the block holds and delays all elements of the input by the same time step. yTT = resample (xTT,p,q, ___) resamples the uniformly sampled data in the MATLAB ® timetable xTT at p / q times the original sample rate and returns a timetable yTT. The values that appear before the shifted signal are the filter states. Has sliders to change the amplitude, theta, and frequency. It is zero for negative x and 1 for positive x, making a step at exactly x = 0. Load the signals into the MATLAB® workspace and plot them. Instead use the value 1 at the right locations. Suppose I have a discrete time signal x [n]. If you specify a dfilt. SineWave (Name,Value) creates a sine wave object with each specified property set to the specified value. Then you can do the convolution you described. This block allows you to add a time delay to the input signal when: Either transition is detected. e. This can be done using 'delayseq' function in MATLAB. Each signal can be a scalar, vector, matrix, or N-D array. Step 2: Description. Incorporate input, output, or transport delays as factors of 1/z in a discrete-time model. the scaling and reversal method would also allow you to choose the numbers to scale it. The x axis is simply an index number, and this is showing your the correlation for leading and trailing shifts. And yes I meant the following x3=x1(2n)x2(3n) x4=2x1(n/2) + 4x2(n/3) x5=x1. On the Model Explorer toolbar, select Add > Simulink Signal. The two blocks have identical functionality, but different default settings. The Transport Delay block delays the input by a specified amount of time. Low pass filtering and resampling the input signals to higher sampling rates may help to eliminate noise and improve pick peaking. Define initial conditions on the block dialog box or as input to the block. However, if D is not an integer multiple of the sampling frequency, then in addition to the zero prefixing, you also need to apply a fractional delay filter to the signal. mdl = 'scdspeed_compdelay' ; open_system(mdl) In this model, the Computational Delay block models the effects of the computational delay. Define upper and lower limits on the integral. Aug 20, 2023 · 1 Answer. Jun 25, 2021 · The issue is we are looking for likeness but the values are scaled beyond that metric. shifted_signal = delayseq(signal,5); The Delay block delays a discrete-time input by the number of samples or frames specified in the Delay units and Delay parameters. Furthermore, u [n] is the step function or in matlab the heaviside function. Performs zero-phase filtering of a signal with a digitalFilter. Time Scaling of a Signal2. The operation of the on-off delay is represented in the following figure: May 1, 2021 · Sorted by: 1. The first DFT "bin" corresponds to zero frequency. structure with no inputs, a default filter is created. I need help calculating a signal first derivative. h = [1/2 1/2]; binomialCoeff = conv(h,h); Feb 9, 2020 · These are for sampling signals at a specific sampling rate (specific time intervals) and introducing specific time delays (multiples of the sampling rate). The Unit Delay block delays its input by the specified sample period. The Time Scope is optimized for discrete time processing. Specify the variable name as Hd. Envelope of Asymmetric Sequence. In integration mode, T is the block sample time (delta T in the case of To simulate the response of a discrete-time system to a periodic input signal, use the same sample time with gensig to generate the input. To find the coefficients for the binomial filter, convolve [ 1 / 2, 1 / 2] with itself and then iteratively convolve the output with [ 1 / 2, 1 / 2] a prescribed number of times. Therefore it is also called a discrete-time signal, which is Suppose a signal that occupies the full Nyquist interval (i. Internal delays can model feedback loops with delays. See Configure Options for Impulse Response for an example. Please note that this is not the circular shift and we have inbuilt code for circular shift. A robust deconvolution function to study wave propagation. Also has option to sample. Im not sure if my script correct? A discrete-time signal is represented symbolically as. Set xmax to 0. The output port has the same signal dimensions as the data input port u for variable-size inputs. Select File > Export to export your FIR filter to the MATLAB® workspace as coefficients or a filter object. Create and plot a signal that resembles the initial detection of a light pulse propagating through a dispersive medium. The delay is equal to the sample time of the controller, which is the worst case. For a side-by-side comparison, see Second-order section coefficients, specified as a matrix. How to plot discrete time signal by MATLAB. Filters a signal using a digitalFilter. If I would apply a unit delay to the signal, the transfer function would be z^-1 and the signal is now: 0,0,1,1,1,1,0,0,0,0. 4. 1, 'foh' ); Compare the step responses of the Divide the derivative by dt, the time interval between consecutive samples, to set the correct units. K is an optional scaling factor, specified using the Gain value parameter. This block is equivalent to the z-1 discrete-time operator. The autocorrelation sequence of a periodic signal has the same cyclic characteristics as the signal itself. %y is generated periodic signal. Library. The other input ports do not accept variable-size signals. Using the dirac (delta) function in matlab will not work for discrete functions as the outcome is Inf at n=0. The quantizer block is for forcing the output to only have specific values (with a specific resolution). . Output the block state. Jul 18, 2018 · 1. Could this be Jul 27, 2019 · convolution of 2 discrete signal. The second task would be to create a step Jun 10, 2016 · Discussions (1) This GUI showcases the basic continuous-time and discrete-time signals in Matlab: sine, cosine, exponential, unit step, impulse, ramp, and rectangular pulse. Figure 2. You can use this block to simulate a time delay. Use the cross-correlation sequence to detect the time delay in a noise-corrupted sequence. The Delay value must be an integer value greater than or equal to zero. If you want to use the impulse response send a 1 (followed by 0s) into your difference equation and calculate the output of the DT system. If x and y have different lengths, the function appends zeros to the end of the shorter vector so it has the same length as the other. You specify the block output for the first time step using the Initial Feb 2, 2017 · Compute deconvolution of two discrete time signals in frequency domain to study wave propagation. The frequency input to the Chebyshev Type II design function sets the beginning of the stopband rather than the end of the passband. The mean of its squares (average of instantaneous power of all samples) minus the square of its mean (all samples added together and squared). In this example, use five total iterations. when you are satisfied with the filter shape, export it to the MATLAB workspace. Share. %n the number of periods. filtfilt. The model has input delay τ i, output delay τ o, and internal delay τ. Each signal can be scalar or vector. Step 1: OpenMATLAB<< Then on the top left corner click on theFileoption << ClickNew<< Then clickScript. Filter Delay. Mar 5, 2016 · I had used the square bracket notation to show that the signal was of discrete time because on paper continuous time signals are written in circle brackets and discrete in square brackets. , where. ',freq (I)) Note that the frequency bins in the DFT are spaced at Fs/N where Fs is the sampling frequency and N is the length of the signal. Jul 5, 2012 · Choose a high-pass filter from there and choose a cut0ff frequency. Jul 5, 2016 · I've been trying to implement generalized cross correlation with a PHAT weighting function for a while now, and cannot get it to work. num and den contain the coefficients of the numerator and denominator in descending powers of z. Interconnecting models that have time delays can give rise to internal delays. Q1: If E[y(t)] = mean of a process y. bandpass: Bandpass-filters a signal using a digitalFilter and compensates for the delay introduced by the filter Nov 12, 2014 · Explained as: 'the variance of the signal is the mean of its squares minus the square of its mean'. Compute the cross-correlations between the three pairs of signals. exp(-t. This block can integrate or accumulate a signal using a forward Euler, backward Euler, or trapezoidal method. Plot the cross-correlations. *x2 May 23, 2022 · The second-most important discrete-time signal is the unit sample, which is defined to be. Use this input argument to change the response configuration such as specify delay or input offset. Oct 27, 2021 · n=-n; similarly you can do till x [n-4]; time shifting of Discrete Signals. Discrete-time plots in Matlab? 0. Learn more about digital signal processing MATLAB. Dec 2, 2019 · Hovewer, if you know the exact frequency (most probably it is you who is injecting the probing sinusoid), you can use sine wawe correlation: SWCtruncated You get complex amplitude U1 and U2 for signal 1 and signal 2. The Delay block provides the following support for variable-size signals: The data input port u accepts variable-size signals. You can either write the number of samples you want to shift or the in terms of time, the amount of delay you want. Time Shifting of a Signal2. You can specify additional arguments n, beta, or b. Type help (xcorr) in Matlab to get further detail in how to return the lag. Filters a signal with a digitalFilter using an FFT-based overlap-add method. Plot the envelopes. The shift at index 80 is lag = 0, the origin you are interested in. Establish an equivalence between linear and Apr 17, 2013 · How to plot a discrete signal in matlab? 0. I have tried correlating using MATLAB's xcorr. Unit Delay. Nov 15, 2018 · But as you know, the DTFT and CTFT are infinite sums/integrals so cannot actually be computed by a computer. Choose a web site to get translated content where available and see local events and offers. Normalize them so their maximum value is 1. This can be invoked using the command mean(y) or writing the statement Create a stem plot of 50 data values between - 2 π and 2 π. The Discrete-Time Integrator block can be used in place of the Integrator block to create a purely discrete system. The sampling rate and the frequencies can be as per convenience. Depending on the filter characteristics, the delay can be constant over all frequencies, or it can vary with frequency. Discrete states with an initial condition parameter. The first model has a discrete implementation of the control system. 3 s s - 1 s 2 + 4 s + 5. The On-Off Delay block applies a delay on the Boolean input signal. For a given step n, Simulink updates y (n) and x (n+1). 2f Hz. For the initial condition, set the value on the dialog box. Click Design Filter. Delay Signal by Integer Number of Samples. Cross-correlation is simply a convolution without the reversing, so to 'undo' the reversing of the correlation integral you can first apply an additional reverse to one of your signals (which will cancel out in the convolution). It is said that x [n-k], where K>0, is a delayed version of x [n]. If we'd like to reduce the sampling rate by a factor of 4 to 200 Hz, significant aliasing will occur unless the bandwidth of the signal is also reduced by a factor of 4. Jan 17, 2012 · Answers (3) Honglei Chen on 17 Jan 2012. Any symmetric filter of length N will have a delay of (N-1)/2 samples. The Pulse Generator block can emit scalar, vector, or matrix signals of any May 2, 2022 · Generate Continuous Sine Wave and Discrete Sine Wave - Matlab CodeContinuous-Time Sinusoidal SignalA sinusoidal signal which is defined for every instant of Time-domain and frequency-domain analysis commands let you compute and visualize SISO and MIMO system responses such as Bode plots, Nichols plots, step responses, and impulse responses. Description. t = 0. fs = 1. Contents of this Video:1. Jun 4, 2018 · 1. Shifting the results of the Hilbert Transform (+ j) and adding it to the original signal creates a complex signal as we'll see below. It also includes basic signal transformations: time scaling, shifting, and reversal. We usually draw discrete-time signals as stem plots to emphasize the fact they are functions defined only on the integers. 0e4; t = 0:1/fs:0. Dec 12, 2019 · 1 Answer. Discretize the system using the triangle (first-order-hold) approximation with sample time Ts = 0. Your next step is to construct a bandpass filter around 1 kHz, you can do that a Configuration of the applied impulse signal, specified as a RespConfig option set. Model Time Delays. Dec 22, 2020 · In this video, we will show how to visualize a time shifted version of a signal in MATLAB. σ(x) ≡ E[x2] − (E[x])2 σ ( x) ≡ E [ x 2] − ( E [ x]) 2. The input to this block should be a continuous signal. This function can shift the signal in fractional samples. For example, the following transfer function represents a discrete-time SISO system with a delay of 25 sampling periods. No, that's x(t − τ). delay (latency) returns a discrete-time filter, Hd, of type delay , which adds the number of delay units specified in latency to any signal filtered with Hd. Represent input and output delays, transport delays, or internal delays in dynamic system models. Assume a sampling rate of 10 kHz. The discrete Hilbert Transform is a process by which a signal's negative frequencies are phase-advanced by 90 degrees and the positive frequencies are phase-delayed by 90 degrees. The block waveform parameters, Amplitude, Pulse Width, Period, and Phase delay , determine the shape of the output waveform. e, shift<0. Let's say your filter name is myFilter and your signal name is mySignal. filter. shifted_data = delayseq (data,DELAY) You must notice that data must be a column vector or it won't work and you should specify in DELAY the number of samples you want to delay your signal. 0. uv zh yd rc ut fo da bm yb zq

All Channels

Popular Channels

Distant Channels

NextGen/ATSC 3.0