Blind Channel Identification and Source Separation in Space Division Multiple Access Systems

2018 ◽  
pp. 21-1-21-55
Author(s):  
Victor Barroso ◽  
João Xavier ◽  
José M. F. Moura
Keyword(s):  
Multiple Access ◽  
Source Separation ◽  
Channel Identification ◽  
Space Division Multiple Access ◽  
Space Division ◽  
Blind Channel Identification ◽  
Blind Channel

scholarly journals Space Division Multiple Access With a Sum Feedback Rate Constraint

2007 ◽  
Vol 55 (7) ◽  
pp. 3879-3891 ◽  
Author(s):  
Kaibin Huang ◽  
Robert W. Heath ◽  
Jeffrey G. Andrews
Keyword(s):  
Multiple Access ◽  
Space Division Multiple Access ◽  
Space Division

scholarly journals Frequency Domain Backoff for Continuous Beamforming Space Division Multiple Access on Massive MIMO Wireless Backhaul Systems

2020 ◽  
Vol 16 (1) ◽  
pp. 1-10
Author(s):  
Kazuki Maruta
Keyword(s):  
Frequency Domain ◽  
Multiple Access ◽  
Random Access ◽  
Packet Delay ◽  
Base Station ◽  
Spatial Multiplexing ◽  
System Throughput ◽  
Space Division Multiple Access ◽  
Wireless Backhaul ◽  
Space Division

This paper newly proposes a frequency domain backoff scheme dedicated to continuous beamforming space division multiple access (CB-SDMA) on massive antenna systems for wireless entrance (MAS-WE). The entrance base station (EBS) has individual base band signal processing units for respective relay stations (RSs) to be accommodated. EBS then continuously applies beamforming weight to transmission/reception signals. CB-SDMA yields virtual point-to-point backhaul link where radio resource control messages and complicated multiuser scheduling are not required. This simplified structure allows RSs to work in a distributed manner. However, one issue remains to be resolved; overloaded multiple access resulting in collision due to its random access nature. The frequency domain backoff mechanism is introduced instead of the time domain one. It can flexibly avoid co-channel interference caused by excessive spatial multiplexing. Computer simulation verifies its superiority in terms of system throughput and packet delay.

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