Open AccessAnalysis of Single‐RF MIMO Receiver with Beam‐Switching Antenna
Author(s) -
Gwak Donghyuk,
Sohn Illsoo,
Lee Seung Hwan
Publication year - 2015
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.15.0114.0618
Subject(s) - mimo , antenna (radio) , electronic engineering , interference (communication) , 3g mimo , spatial multiplexing , radio frequency , channel (broadcasting) , engineering , computer science , electrical engineering , beamforming
This paper proposes a single‐RF MIMO receiver that adopts a beam‐switching antenna (BSA) instead of a conventional array antenna. The beauty of the proposed single‐RF MIMO receiver with BSA is that it can be deployed in a very small physical space while achieving a full spatial multiplexing gain. Our analysis has revealed that the use of a BSA inevitably results in the spectrum spreading effect at the RF output, which in turn causes an SNR decrease and adjacent channel interference (ACI). Two novel receiver techniques are proposed to mitigate the issues of redundant sub‐band suppression and ACI avoidance. Numerical analysis results verify the performance improvement from the proposed receiver techniques.