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Link-Adaptive MIMO Systems With Ordered SIC Receiver Using Stream-Ordering Algorithms in Multiuser Environments

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4 Author(s)
Jaesang Ham ; Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul ; Kyeongyeon Kim ; Sangheon Kim ; Chungyong Lee

This paper proposes new algorithms to improve the bit error rate (BER) and data rate of link-adaptive multiple-input-multiple-output (MIMO) systems with ordered successive interference cancellation (OSIC) receivers in a multiuser environment. The proposed algorithms are as follows: (1) the power adaptation (power allocation-equal rate) scheme; (2) the rate adaptation (equal power-adaptive modulation) scheme; and (3) the power and rate adaptation (power allocation-adaptive modulation) scheme. Additionally, as the OSIC receiver is exploited in the proposed algorithms, the detection order of each user's receiver is considered since the performance of the system using it is seriously affected by the detection order. Finally, the proposed algorithms are executed to minimize the BER or to maximize the data rate of the system by simultaneously considering link adaptation techniques and the detection order of the OSIC receiver.

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Vehicular Technology, IEEE Transactions on  (Volume:57 ,  Issue: 5 )