期刊
IEEE WIRELESS COMMUNICATIONS LETTERS
卷 4, 期 4, 页码 405-408出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2015.2426709
关键词
Non-orthogonal multiple access (NOMA); multiple-input multiple-output (MIMO); ergodic capacity; power allocation
资金
- National High-Tech R&D Program of China [2014AA01A703, 2014AA01A704]
Non-orthogonal multiple access (NOMA) is expected to be a promising multiple access technique for 5G networks due to its superior spectral efficiency. In this letter, the ergodic capacity maximization problem is first studied for the Rayleigh fading multiple-input multiple-output (MIMO) NOMA systems with statistical channel state information at the transmitter (CSIT). We propose both optimal and low complexity suboptimal power allocation schemes to maximize the ergodic capacity of MIMO NOMA system with total transmit power constraint and minimum rate constraint of the weak user. Numerical results show that the proposed NOMA schemes significantly outperform the traditional orthogonal multiple access scheme.
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