講演情報
[C-12-21]A Ka-Band 8-Stream Phased-Array MIMO Receiver with Time-Hopping Blocker Rejection for 6G
〇ZIYUAN REN1, Minzhe Tang1, Dongfan Xu1, Yi Zhang, Yuxuan Liu1, Zheng Li, Yilun Chen1, Minghao Fan1, Jian Pang, DingXin Xu, Chenxin Liu, Daxu Zhang1, Duo Li1, Yuncheng Zhang1, Hiroyuki Sakai1, Kazuaki Kunihiro1, Kenichi Okada1 (1. Institute of Science Tokyo)
キーワード：
Phased-array receiver、time-division MIMO
This work presents a Ka-band 8-stream phased-array MIMO receiver with non-uniform time-hopping blocker rejection for 6G wireless systems. Time-division MIMO enables multiple spatial streams to share the same phased-array receiver hardware, but its periodic stream-switching operation generates harmonics that can fold strong blockers into the desired signal band. To suppress this blocker aliasing, the proposed receiver pseudo-randomly reorders the stream assignment sequence while maintaining the same average duty cycle. This non-uniform time-hopping operation spreads the switching harmonics and generates spectral nulls at the original harmonic locations without additional RF filters or cancellation paths. OTA measurements using a 50-MS/s 16-QAM OFDMA signal demonstrate that the proposed method improves blocker tolerance by 34 dB and recovers the EVMRMS from −13.3 dB to −29.9 dB under a 0-dBc blocker condition.