Question about Communication Toolbox's 802.11n MIMO channel model example. Where is oversampling occuring?

1 view (last 30 days)
This is a question directed to anyone familiar with the Communications System Toolbox, or communications theory in general.
Mathworks has published an example of using comm.MIMOChannel to model a channel according to the 802.11n (Wifi) specification here:
My confusion is regarding initial block of code:
M = 2; % Modulation order
Rsym = 10e3; % Input symbol rate
Rbit = Rsym*log2(M); % Input bit rate
Nos = 4; % Oversampling factor
Rs = Rbit*Nos; % Input sample rate
The oversampling factor (Nos) is clearly stated as 4. And the documentation says "The input to the channel simulator is oversampled by a factor of four." However, later in the code, samples are generated at the symbol rate using the pskmod() function and fed directly into the channel step function. I see no palce where the input is oversampled (unless this is happening inside the channel step function). So where is the oversampling occuring?

Answers (0)

Categories

Find more on Get Started with DSP System Toolbox in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!