Channel model impairment in MATLAB
This section of MATLAB source code covers channel model impairment and rayleigh channel effect on constellation diagram using matlab code.
Part A and PART C of the matlab code is same as mentioned on AWGN page.
Source code - PART B
choice=input('Enter 1 to apply the channel, other no. to bypass:');
%10 Hz;sample time=0.1e-3;
tau=[0.0 0.4 0.9];
pdb=[0 -15 -20];
chan = rayleighchan(ts,doppler,tau,pdb);
%TS is the sample time of the input %0.1e-3;
%signal, in seconds. FD is the maximum Doppler shift, in Hertz. %100 Hz
figure;plot(real(map_out_chl),imag(map_out_chl),'r+');title('constellation with channel');
disp('no channel applied proceed to DC offset');
Input and output constellation diagram
DOWNLOAD CHANNEL MODEL MATLAB CODES
Following are matlab codes for channel models viz. SUI channel model, ITU-T channel model as per wimax 802.16e standard, JTC channel model as per 802.11b/11g, UWB channel model as per 802.15.3 and 802.15.4 standard specifications.
802.11a WLAN channel model matlab files
802.11b 11g JTC WLAN channel model matlab files
802.15.3 UWB channel model matlab files
802.15.4 UWB channel model matlab files
802.16d SUI WiMAX channel model matlab files
802.16e ITU-T channel model matlab files
Rayleigh channel model matlab files
Rician channel model matlab files
Useful Links to MATLAB codes
Refer following as well as links mentioned on left side panel for useful MATLAB codes.
OFDM Preamble generation Time off estimation corr Freq off estimation corr channel estimation 11a WLAN channel PN sequence generation OFDMA Tx Rx AES DES carrier aggregation CCDF FIR Filter IIR Filter Low Pass FIR Viterbi decoder CRC8 CRC32