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What is the effect of the transmit power on detection process(sphere decoder) in MIMO systems, I mean if we transmit with equal power(or with unequal power) for all transmit antennas for MIMO.
What is the effect of the transmit power on detection process(sphere decoder) in MIMO systems, I mean if we transmit with equal power(or with unequal power) for all transmit antennas for MIMO.
If x∈{exp(j2pil/L|l=0,1,...,L-1}^M, x is transmitted QPSK signals, M is transmitting antennas L=4 is the modulation level.
I need to get the formula of x for 4-QAM, 8-QAM, 16-QAM and 64-QAM.
Hi, I need to understand the meaning of ordering phase of reception scheme in detection process of MIMO systems when I use V-BLAST, K-best SD algorithm or any detection scheme.
In some papers consider a reception scheme without the ordering phase (i.e. the substream coming from the first...
Hi, please I need answer to my equation, I'm work MIMO system Y=H(P^½)X+ N, P: is the power adding to transmitted signals X, I'm ask about the added power(there are two types of power) the first type when add it as P=[p1,p2,p3...], p1>p2>p3... This unequal power where the proportion between the...
hi, I need someone write to me steps of matlab to create stream of data (M-QAM 16-QAM modulation) like this steps b=randn(L,N)>0.5;%This is the 0 1 streams
d=2.*b-1;%This is the corresponding -1 +1 streams (BPSK modulation)
THANKS
Thanks David83 for your comment, but I need steps like this:
Nt = 4;
Nr = 4;
EbNo = 0:3:25; % SNR dB
N = 5; % The length of each frame
L = 100; % the total number of frames
M = 16...
hi, in my matlab code stream of data, I'll do it in program like this steps:
N=??; % length of each frame
L=??; % total number of frames
for i=1:L
y=H*s(:,(i-1)*N+1:i*N)+W;
-------
-------
end
In above steps I suppose the system deal with all data as one stream, now I want to divide the data in...
what is the difference between this systems(y=HX+w) and (y=H*P^1/2*X+w) in sense of detection process of MIMO systems? where y is the receive symbols, H is the channel matrix, X is the transmit symbols, P is the trasmit power for each antenna, w: noise .
What is the best system (complex-valued or real-valued) use in sphere detection algorithm in MIMO systems to get a good performance(SER/SNR) and less complexity, if I use 4x4 MIMO system with 16-QAM modulation.
Hi, pls I'll ask about the system model, in many papers the author is use the real-valued equivalent of the complex-valued model to make the derivation ease. Like the equations in attachment, or in matlab code like this: Y=HX+W
H_complex = (randn(Nr,Nt)+1j*randn(Nr,Nt))/sqrt(2); % Flat...
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