msk的调制解调源代码(国外英语资料).doc

msk的调制解调源代码(国外英语资料) MSK modulation and demodulation MATLAB source code This article is contributed by shenfei20 MSK modulation and demodulation MATLAB source code Function out = delay (data, N, sample_number)%data: delay%n: delay data symbol number%sample_number: symbol number of sampling out = zeros (1, length (data)); out (n*sample_number+1:length (data)) = data (1:length (data) -n*sample_number); Function [data_diff] = difference (data) encoding%*************************************************************************% difference *%data%data_diff input signal differential encoding signal %************************************************************************* * %-------------------------------------------------------------------------data_diff = zeros (1, length (data)); data_diff (1) = 1 * data (1); for I = 2:length (data) data_diff (I) = data_diff (i-1) * data (I); end%********* **************************************************************** *%1 as the initial reference value of differential encoding Function [signal_out, I_out, Q_out] = mod_msk (data, data_len, sample_number, Rb)%MSK baseband modulation%************************************************************************* *% data% data_len modulation symbol number of each symbol sampling points % sample_number % Rb% signal_out% I_out% Q_out Symbol rate, baseband modulation, output, I output, Q output %************************************************************************* * % data_len = 10;% sample_number = 8;% Rb = 16000; % symbol number,% sampling point,% symbol rate % data1 = randInt (1, data_len);% data = 2*data1-1;% transmitted sequence Tb = 1/Rb; FS = Rb*sample_number; % symbol time,% sampling rate %-------------------------------------------------------------------------% differential encoding [data_diff] = difference (data);%************************************************************************* * %-------------------------------------------------------------------------% and string conversi