Title :
A SVD-Based Location Coding for Cognitive Radio in MIMO Uplink Channels
Author :
Krikidis, Ioannis
Author_Institution :
Dept. of Comput. Eng. & Inf., Univ. of Patras, Patras, Greece
fDate :
10/1/2010 12:00:00 AM
Abstract :
This letter introduces a transmission technique for cognitive access in M x M Multiple-input multiple-output uplink channels. Based on an appropriate space alignment design, the cognitive channel is decomposed to M orthogonal Gaussian channels that overlap the primary eigenmodes and enable cognitive transmission in two ways: (a) by transmitting cognitive data to the subchannels that overlap unused eigenmodes, (b) by transmitting a codeword of length M using the subchannel activity as a codeword pattern. The investigated technique overcomes limitations of previously reported approaches and guarantees a minimum cognitive data rate equal to the number of antennas.
Keywords :
Gaussian channels; MIMO communication; channel coding; cognitive radio; eigenvalues and eigenfunctions; singular value decomposition; wireless channels; M orthogonal Gaussian channels; MIMO uplink channels; SVD; antennas; codeword; cognitive radio; location coding; multiple input multiple output; primary eigenmodes; Antennas; Chromium; Encoding; Interference; Jamming; MIMO; Signal to noise ratio; MIMO; SVD; cognitive radio; data rate; power allocation; waterfilling;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.082610.100879
