www.gusucode.com > UWB_matlab源码程序 > CP0402/cp0402_2PAM_TH.m
% % FUNCTION 4.1 : "cp0402_2PAM_TH" % % Introduces the DS code given by 'DScode' % and implements binary PAM modulation % 'seq' is the input binary stream % 'fc' is the sampling frequency for the generated signal % 'Ts' is the average pulse repetition period % 'DScode' is the DS code % % The function generates two output streams: % 'PAMTHseq' is the output with both TH and PAM % 'THseq' is the output with TH only % % Programmed by Guerino Giancola % function [PAMTHseq,THseq] = ... cp0402_2PAM_TH(seq,fc,Tc,Ts,THcode) % -------------------------------------------------- % Step One - Implementation of the PAM+TH modulator % -------------------------------------------------- dt = 1 ./ fc; % sampling period framesamples=floor(Ts./dt);% number of samples between % pulses chipsamples = floor (Tc ./ dt); % number of samples for % the chip duration THp = length(THcode); % TH-code length totlength = framesamples*length(seq); PAMTHseq=zeros(1,totlength); THseq=zeros(1,totlength); % --------------------------------------- % Step Two - Main loop for introducing TH % --------------------------------------- for k = 1 : length(seq) % uniform pulse position index = 1 + (k-1)*framesamples; % introduction of TH kTH = THcode(1+mod(k-1,THp)); index = index + kTH*chipsamples; THseq(index)=1; PAMTHseq(index)=((seq(k)*2)-1); end % for k = 1 : length(seq)