Optimal pilot length for uplink massive MIMO systems with low-resolutions ADCs

Li Fan, Dan Qiao, Shi Jin, Chao-Kai Wen, Michail Matthaiou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

23 Citations (Scopus)
508 Downloads (Pure)


In this paper, we consider the problem of pilot based data transmission in massive multiple-input multiple-output (MIMO) systems where each receiver antenna is equipped with a low-precision analog-to-digital converter (ADC). Under the quantized MIMO setting, we derive a tight approximation of the uplink spectral efficiency considering a maximal ratio combining receiver. Capitalizing on the derived expression, the optimal pilot length which maximizes the sum spectral efficiency is put forward. Our results show that massive MIMO with low-resolution ADCs require more training time compared to the case with high-resolution quantizers. In particular, for the receivers with one-bit quantizers, the effective way to maximize the sum spectral efficiency is to assign more pilot symbols instead of increasing the transmit power.
Original languageEnglish
Title of host publicationIEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Publication statusPublished - 19 Sept 2016


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