how to set the frame length in the comm.RicianChannel

how to set the frame length in the comm.RicianChannel

Answer 1

[AR]

Hi @tuo,

I understand you want to set frame length in “comm.RicianChannel. You can set it  by controlling the number of rows in the input signal passed to the channel object. The channel processes each input as a frame, so the frame length is determined by the number of samples (rows) in the input matrix for each call.

1. Choose the number of samples you want to process in each frame.

% Step 1: Decide the frame length 
frameLength = 256; 
numTxAntennas = 1;  % Number of transmit antennas 

2. Initialize the “comm.RicianChannel” object with your desired parameters.

% Step 2: Create the Rician channel object 
chan = comm.RicianChannel( ... 
    'SampleRate', 1e5, ... 
    'PathDelays', 0, ... 
    'KFactor', 4, ... 
    'MaximumDopplerShift', 30); 

3. Create an input signal matrix with the number of rows equal to your frame length. Each row represents a sample.

% Step 3: Generate the input signal 
x = randn(frameLength, numTxAntennas);

4. Pass the input signal to the channel. The channel processes the input as a frame of the specified length.

% Step 4: Pass the signal through the Rician channel 
y = chan(x); 

5. Retrieve the output.

% Step 5: The output y will have the same number of rows as x (frameLength) 
disp(size(y)); 

   256     1

Run the below command to know more about “comm.RicianChannel" function:

doc comm.RicianChannel 

I hope this is helpful!