期刊
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
卷 64, 期 1, 页码 405-411出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2014.2320587
关键词
Linear programming (LP); multiple-input-multiple-output (MIMO); resource allocation; Tomlinson-Harashima precoding (THP)
资金
- People Program (Marie Curie Actions) under FP7 [PIEF-GA-2012-330731 Dense4Green]
- European Commission [318306]
In this paper, we deal with resource allocation in the downlink of spatial multiplexing multiple-input-multiple-output (MIMO)-orthogonal frequency-division multiple-access (OFDMA) systems. In particular, we concentrate on the problem of jointly optimizing the transmit and receive processing matrices, the channel assignment, and the power allocation with the objective of minimizing the total power consumption while satisfying different quality-of-service (QoS) requirements. A layered architecture is used in which users are first partitioned in different groups on the basis of their channel quality, and then channel assignment and transceiver design are sequentially addressed starting from the group of users with most adverse channel conditions. The multiuser interference among users belonging to different groups is removed at the base station (BS) using a Tomlinson-Harashima precoder operating at user level. Numerical results are used to highlight the effectiveness of the proposed solution and to make comparisons with existing alternatives.
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