期刊
IEEE COMMUNICATIONS LETTERS
卷 19, 期 12, 页码 2186-2189出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2015.2494600
关键词
Massive MIMO; quantization; AQNM; uplink rate; MRC
资金
- National Natural Science Foundation of China [61531011, 61450110445, 61222102, 61371109]
- Natural Science Foundation of Jiangsu Province [BK2012021]
- International Science and Technology Cooperation Program of China [2014DFT10300]
- ITRI in Hsinchu, Taiwan [E352J33120]
In this letter, we derive an approximate analytical expression for the uplink achievable rate of a massive multiinput multioutput (MIMO) antenna system when finite precision analog-digital converters (ADCs) and the common maximal-ratio combining technique are used at the receivers. To obtain this expression, we treat quantization noise as an additive quantization noise model. Considering the obtained expression, we show that low-resolution ADCs lead to a decrease in the achievable rate but the performance loss can be compensated by increasing the number of receiving antennas. In addition, we investigate the relation between the number of antennas and the ADC resolution, as well as the power-scaling law. These discussions support the feasibility of equipping highly economical ADCs with low resolution in practical massive MIMO systems.
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