期刊
IEEE COMMUNICATIONS LETTERS
卷 21, 期 8, 页码 1771-1774出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2017.2693276
关键词
Massive MIMO; low-resolution ADC; spectral efficiency; asymptotic equivalent
资金
- National Natural Science Foundation of China [61672484]
- 863 Program [2014AA01A707]
This letter considers an uplink multi-user massive multi-input multi-output (MIMO) system with non-uniform low-resolution analog-to-digital converters (ADCs) and minimum mean-square error receivers at the base station side. Additive quantization noise model is utilized to measure the effect of finite ADC resolution. Non-uniform quantization brings difficulty in obtaining the asymptotic equivalent expression of the spectral efficiency. Based on the random matrix theory, a closed-form asymptotic equivalent expression is derived. Numerical results show the tightness of the asymptotic equivalent. It also shows that massive antennas are able to compensate for the loss of low-resolution quantization, implying the capability of low-resolution ADCs in massive MIMO systems.
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