An RF Signal Processing Based Diversity Scheme for MIMO-OFDM Systems

I Gede Puja ASTAWA  Minoru OKADA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E95-A   No.2   pp.515-524
Publication Date: 2012/02/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E95.A.515
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Digital Signal Processing
MIMO-OFDM systems,  RF signal processing,  MIMO decomposition,  V-BLAST detection,  cyclic shift,  pilot sequence,  

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This paper proposes a diversity scheme for Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) based on Radio Frequency (RF) signal processing. Although a 22 MIMO-OFDM system can double the capacity without expanding the occupied frequency bandwidth, we cannot get additional diversity gain using the linear MIMO decomposition method. The proposed method improves the bit error rate (BER) performance by making efficient use of RF signal processing. Computer simulation results show that the proposed scheme gives additional diversity gain.