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In this letter, we investigate the downlink performance of massivemultiple-input multiple-output (MIMO) systems where the base station isequipped with one-bit analogto-digital/digital-to-analog converters (ADC/DACs).Considering training-based transmission, we assume the base station (BS)employs the linear minimum mean-squared-error (LMMSE) channel estimator andtreats the channel estimate as the true channel to precode the data symbols. Wederive an expression for the downlink achievable rate for matched-filter (MF)precoding. A detailed analysis of the resulting power efficiency is pursuedusing our expression of the achievable rate. Numerical results are presented toverify our analysis. In particular it is shown that, compared with conventionalmassive MIMO systems, the performance loss in one-bit massive MIMO systems canbe compensated for by deploying approximately 2.5 times more antennas at theBS.

Downlink Achievable Rate Analysis in Massive MIMO Systems with One-Bit DACs