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A novel OFDM switching algorithm for symmetric and asymmetric MIMO architectures
Author(s) -
Mlayeh Yosra,
Rouissi Fatma,
Tlili Fethi,
Ghazel Adel
Publication year - 2020
Publication title -
concurrency and computation: practice and experience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 67
eISSN - 1532-0634
pISSN - 1532-0626
DOI - 10.1002/cpe.5831
Subject(s) - orthogonal frequency division multiplexing , rayleigh fading , mimo , bit error rate , transmitter , algorithm , computer science , antenna (radio) , mimo ofdm , multiplexing , channel (broadcasting) , metric (unit) , fading , mathematics , telecommunications , topology (electrical circuits) , electronic engineering , engineering , combinatorics , operations management
Summary In this article, we propose a new criterion for a switching algorithm to be used in MIMO‐OFDM systems. The switching algorithm, which selects between spatial multiplexing and MIMO diversity using the Demmel condition number as selection metrics, is first analyzed. Then, we show the limitation of this criterion, when increasing the receive antenna number. As a solution, we propose multiantenna processing and SNR switching criterion as a novel selection metric. The channel between the transmitter and the receiver is assumed a Rayleigh‐fading channel. Simulations results show that the proposed switching algorithm improves the performances in terms of bit error rate (BER) for symmetric and asymmetric MIMO systems. The gain is about 3 dB at BER = 10 −4 in (4×4) architecture and 2 dB at BER = 10 −4 in (3×2) architecture.