Hello everyone, I am a noob in DSP n in MATLAB. Well i hv been workin on the simulation of Rake Receiver using MATLAB. What I have done so far is this: 1. Generated an input random sequence of 8 bits. This input sequence simulates the information signal to be sent to the channel for retrieving by the RAKE receiver.>> input_bit = fix(2*rand(1,8)); >>input_bit_polar = (2*input_bit - 1); % input signal in antipodal form2. Created a 32 bit PN sequence n 8 x 8 Walsh Code matrix.>> W1 = [0];W2 = [W1 W1; W1 W1]; W4 = [W2 W2; W2 W2]; W8 = [W4 W4; W4 W4]; The Walsh code sequence needs to be separated into the I and Q-channel for QPSK modulation.>> Wodd = Wcode(1:2:length(Wcode)); % Walsh code for I-channelWeven = Wcode(2:2:length(Wcode)); % Walsh code for Q-channel 3. I hv exored the PN sequence with a certain Walsh matrix row say Row2.>> PNseq_I = fix(2*rand(1,length(bit_stream)*4)); % PN sequence for theI-channel PNseq_Q = fix(2*rand(1,length(bit_stream)*4)); % PN sequence for the Q-channel 4. Then then i obtained a complex baseband in the end in the form real + imag*j Now i want to generate a channel impulse response which is fading (multipath) channel so that i can convolve it with this complex baseband signal. SO How should i generate it??? And what sort of channel estimation technique should I use for the same? Eagerly Waiting for ur reply..... Best Regards, Saagar...
CDMA RAKE Receiver Simulation MATLAB.....Channel Impulse Response.....??
Started by ●August 26, 2008
Reply by ●August 26, 20082008-08-26
On Aug 26, 8:51�am, "c.saagar" <c.saa...@gmail.com> wrote:> > Now i want to generate a channel impulse response which is fading > (multipath) channel so that i can convolve it with this complex baseband > signal. SO How should i generate �it???What kind of channel do you want to simulate? Indoor? Outdoor? Mobile? What carrier frequency, what environment?