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BER Performance of Pre-Coded Space-Time Conjugate Two-Path OFDM Systems

BER Performance of Pre-Coded Space-Time Conjugate Two-Path OFDM Systems

Hen-Geul Yeh, Jun Zhou
Copyright: © 2022 |Volume: 14 |Issue: 1 |Pages: 13
ISSN: 1941-8663|EISSN: 1941-8671|EISBN13: 9781683180937|DOI: 10.4018/IJITN.299364
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MLA

Yeh, Hen-Geul, and Jun Zhou. "BER Performance of Pre-Coded Space-Time Conjugate Two-Path OFDM Systems." IJITN vol.14, no.1 2022: pp.1-13. http://doi.org/10.4018/IJITN.299364

APA

Yeh, H. & Zhou, J. (2022). BER Performance of Pre-Coded Space-Time Conjugate Two-Path OFDM Systems. International Journal of Interdisciplinary Telecommunications and Networking (IJITN), 14(1), 1-13. http://doi.org/10.4018/IJITN.299364

Chicago

Yeh, Hen-Geul, and Jun Zhou. "BER Performance of Pre-Coded Space-Time Conjugate Two-Path OFDM Systems," International Journal of Interdisciplinary Telecommunications and Networking (IJITN) 14, no.1: 1-13. http://doi.org/10.4018/IJITN.299364

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Abstract

It’s critical to design a robust wireless communication system that achieves an improved bit error rate (BER) in mobile channels. In this paper, a 2x2 space-time (ST) orthogonal frequency division multiplexing (OFDM) system is proposed with conjugate cancellation (CC) two-path transmission scheme. The 2x2 STCC-OFDM system features in the excellent inter-carrier interference (ICI) mitigation in the mobile channels with a better BER than that of a conventional 2x2 ST-OFDM system. Five orthogonal transforms are employed as the precoder to enhance the BER further, such as Zadoff-Chu transform (ZCT), slant transform (ST), discrete Hartley transform (DHT), Haar transform (HT), and Walsh–Hadamard transform (WHT). ZCT row wise precoder provide the lowest peak-to-average power ratio and good BER performance. Simulations demonstrate that the proposed STCC-OFDM systems are robust to various channel environments Although the STCC-OFDM systems improve BER with the cost of reducing bandwidth efficiency when compared to a ST-OFDM, they can be compensated by a higher QAM constellation size.

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