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In this letter, we have investigated the frequency diversity gain of a sparse code multiple access (SCMA) system to improve spectrum utilization by exploiting the codebook correlation in the SCMA system. To this end, a backtracking codebook matching (BCM) algorithm is proposed, whereby there are more successfully scheduled users, which are allocated the low-correlated codebooks. Simulation results...
This paper studies the transmit/receive beamformers design and resources allocation problem for downlink multiuser MIMO-OFDM systems. We propose an algorithm for jointly optimizing the transmit and receive beamformers and resources allocation to minimize the transmission power and at the same time satisfying userspsila quality of service (QoS) in terms of bit error rate (BER) and minimum data rate...
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