Asymmetrical Uplink and Downlink Transceivers in Massive MIMO Systems

Even if massive multiple-input multiple-output (MIMO) can theoretically bring huge benefits, it incurs substantial hardware complexity and expensive costs. To address these issues while maintaining the system performance simultaneously, we develop an asymmetrical transceiver architecture for MIMO systems in this paper by releasing shackles on radio frequency (RF) chains. Specifically, first where number of receive RF chains is different from that transmit Due to unequal chains, channel inconsistency appears. overcome thus fully harness system's downlink data transmission capability, propose two uplink-to-downlink transfer algorithms. The cost power consumption models are also developed uplink signal-to-noise loss due investigated. Through analyzing spectral, cost, energy efficiency, demonstrate proposed transceiver-based achieve excellent spectral efficiency a reasonable efficiency.