Multi-stream signals separation based on space-time-isomeric(SPATIO)array using metasurface antennas  

作　　者：Yangming LOU Liang JIN Huiming WANG Zhou ZHONG Junyan DAI 

机构地区：[1]PLA Strategic Support Force Information Engineering University,Zhengzhou 450001,China [2]School of Information and Communications Engineering,Xi’an Jiaotong University,Xi’an 710049,China [3]State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China

出　　处：《Science China(Information Sciences)》2024年第2期177-196,共20页中国科学（信息科学）（英文版）

基　　金：This work was supported by Program of Song Shan Laboratory(included in the Management of the Major Science and Technology Program of Henan Province)(Grant Nos.221100211300-01,221100211300-03);National Natural Science Foundation of China(Grant Nos.U22A2001,62201139,62171364).

摘　　要：In spatial domain signal processing,it is necessary to equip more antennas at the receiver to improve spatial demultiplexing capability.However,increasing the number of antennas under restricted space will reduce antenna spacing and raise the channel correlation,making the number of signal streams spatially demultiplexed much smaller than that of antennas.This paper proposes a method to design a space-timeisomeric(SPATIO)array based on metasurface antennas under wireless multipath conditions.Each antenna in this array has a different pattern and varies independently with time,reducing the channel correlation by superposing multipath at distinct positions and moments.Based on the SPATIO array,we present an array parameter design scheme based on infinity norm minimization,which can maximize the received energy of each stream while separating multi-stream received signals.Simulation results illustrate the performance of the SPATIO array for multi-stream signal reception.Compared with conventional multiple-input multipleoutput arrays,the proposed array can reduce the bit error rate by one order of magnitude under the same simulation conditions.

关 键 词：multiple-input multiple-output metasurface antenna space-time-isomeric array multipath channel degree of freedom 

分 类 号：TN820[电子电信—信息与通信工程]