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VTC
2010
IEEE
158views Communications» more  VTC 2010»
13 years 7 months ago
Joint Channel Impulse Response and Noise-Variance Estimation for OFDM/SDMA Systems Based on Expectation Maximization
Abstract—A joint channel impulse response (CIR) and noisevariance estimation scheme is proposed for multi-user MultipleInput-Multiple-Output (MIMO) Orthogonal Frequency-Division ...
Jiankang Zhang, Xiaomin Mu, Lajos Hanzo
ICC
2008
IEEE
140views Communications» more  ICC 2008»
14 years 3 months ago
Numerical Performance Evaluation of impaired OFDM Links using Alamouti Space Time Coding
—In this paper we present an analytical approach to evaluate the M-QAM bit error rate (BER) as well as channel capacity of Alamouti space time coded OFDM systems in case of direc...
Marco Krondorf, Gerhard Fettweis
CORR
2010
Springer
68views Education» more  CORR 2010»
13 years 6 months ago
Communicating Under Channel Uncertainty
For a single transmit and receive antenna system, a new constellation design is proposed to combat errors in the phase estimate of the channel coefficient. The proposed constellati...
Naqueeb Warsi, Rahul Vaze, Tapan Shah
VTC
2006
IEEE
14 years 2 months ago
Improved Channel Estimation in OFDM Systems with Synchronization Errors and Back-Off
— In Orthogonal Frequency Division Multiplexing (OFDM) systems, synchronization errors in the receiver cause a linear phase rotation at the output of the Discrete Fourier Transfo...
Hisham A. Mahmoud, Hüseyin Arslan
GLOBECOM
2009
IEEE
14 years 3 months ago
How Much Training Is Needed for Iterative Multiuser Detection and Decoding?
Abstract—This paper studies large randomly spread directsequence code-division multiple-access system operating over a block fading multipath channel. Channel knowledge is obtain...
Mikko Vehkaperä, Keigo Takeuchi, Ralf R. M&uu...