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This paper addresses the problem of transmitting data to multiple mobile stations using a decode-and-forward strategy. Precoding vectors are used in relays to cancel out multiple access interference at the mobile stations. Statistical distribution of signal to noise ratio (SNR) is approximated by an expectation maximization algorithm. Based on this distribution, system performance is evaluated for...
Mitigation of multipath fading effects and suppression of multiuser interference (MUI) constitute major challenges in the design of the third generation wireless mobile systems. Space-time (ST) coding offers a attractive solution to cope with mutipath fading, but most existing ST coding schemes assume flat fading channels that may not be realistic for wide-band communications. Especially multiuser...
We present the performance of a new multi-user detector for space frequency uplink transmission in multi-carrier CDMA systems. In our proposed architecture, the data symbols are parallelized and then each of the symbols is spread by a spreading code before sending the chips as multiple OFDM codeword. The SFBC decoder is placed at the last stage of our multi-user receiver and the user separation is...
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