modulation.m

802.15 dsss 物理协议层方针代码

function [mo_data,min_position,max_position,fss]=modulation(data,piconet_num,sample_times)
% sample_times=3;
shaped_data=p_shaping(data,sample_times);
segma=0.025e-9;
fc=[3939 3978 4017 4056 3900 4094 7878 7956 8034 8112 7800 8190]*1e6;

[trend,min_position,max_position,fss]=Gaussian_trend(segma,fc(piconet_num),length(data));
mo_data=shaped_data.*trend;
% figure(3);
% subplot(3,1,1)
% stem(min_position:1/fss:1000/fss,shaped_data(1:1002));
% title('spreaded data pulse');
% subplot(3,1,2)
% plot(min_position:1/fss:1000/fss,trend(1:1002));
% title('carrier trend');
% subplot(3,1,3)
% plot(min_position:1/fss:1000/fss,mo_data(1:1002))
% title('modulated data pulse')