Performance of OFDM AF relay system with subcarrier mapping 
in the presence of carrier frequency offsets

doi:10.1016/S1005-8885(15)60666-5

中国邮电高校学报(英文) ›› 2015, Vol. 22 ›› Issue (4): 42-50.doi: 10.1016/S1005-8885(15)60666-5

Performance of OFDM AF relay system with subcarrier mapping in the presence of carrier frequency offsets

LI Ju-hu,Huang Jing, Nie Juan

1. School of Information, Beijing Forestry University, Beijing 100083, China 2. College of Computer and Information Engineering, Beijing University of Agriculture, Beijing 102206, China

收稿日期:2015-01-15 修回日期:2015-03-29 出版日期:2015-08-28 发布日期:2015-08-28
通讯作者: LI Ju-hu E-mail:lijuhu@bjfu.edu.cn

Performance of OFDM AF relay system with subcarrier mapping in the presence of carrier frequency offsets

LI Ju-hu,Huang Jing, Nie Juan

1. School of Information, Beijing Forestry University, Beijing 100083, China 2. College of Computer and Information Engineering, Beijing University of Agriculture, Beijing 102206, China

Received:2015-01-15 Revised:2015-03-29 Online:2015-08-28 Published:2015-08-28
Contact: LI Ju-hu E-mail:lijuhu@bjfu.edu.cn

摘要/Abstract

摘要： This article deals with the performance analysis of orthogonal frequency division multiplexing (OFDM) amplify-and-forward (AF) relay system with subcarrier mapping (SCM) in the presence of carrier frequency offset (CFO). Although SCM in an OFDM system has been investigated extensively, nevertheless, the bit error rate (BER) of the system with CFO is not yet available in the literature. This paper presents the BER analysis of a dual hop OFDM AF relay system with ordered subcarrier paring schemes, i.e., best-to-worst (BTW) SCM and best-to-best (BTB) SCM. Accurate close-form expressions are derived for end-to-end BER while considering a dual-hop fixed gain AF relaying system with CFO in Rayleigh fading channel. To provide more insights, their closed-form asymptotic expressions are then obtained. It is shown that the presence of CFO causes the BER of system maintain a fixed level even while signal-to noise ratio (SNR) is in high regime. The simulation results verify that the derived average BER expressions are accurate in Rayleigh fading channel.

关键词: amplify-and-forward, OFDM, subcarrier mapping, carrier frequency offset

Abstract: This article deals with the performance analysis of orthogonal frequency division multiplexing (OFDM) amplify-and-forward (AF) relay system with subcarrier mapping (SCM) in the presence of carrier frequency offset (CFO). Although SCM in an OFDM system has been investigated extensively, nevertheless, the bit error rate (BER) of the system with CFO is not yet available in the literature. This paper presents the BER analysis of a dual hop OFDM AF relay system with ordered subcarrier paring schemes, i.e., best-to-worst (BTW) SCM and best-to-best (BTB) SCM. Accurate close-form expressions are derived for end-to-end BER while considering a dual-hop fixed gain AF relaying system with CFO in Rayleigh fading channel. To provide more insights, their closed-form asymptotic expressions are then obtained. It is shown that the presence of CFO causes the BER of system maintain a fixed level even while signal-to noise ratio (SNR) is in high regime. The simulation results verify that the derived average BER expressions are accurate in Rayleigh fading channel.

Key words: amplify-and-forward, OFDM, subcarrier mapping, carrier frequency offset

LI Ju-hu,Huang Jing, Nie Juan. Performance of OFDM AF relay system with subcarrier mapping in the presence of carrier frequency offsets [J]. Acta Metallurgica Sinica(English letters), 2015, 22(4): 42-50.

参考文献

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Performance of OFDM AF relay system with subcarrier mapping in the presence of carrier frequency offsets

Performance of OFDM AF relay system with subcarrier mapping in the presence of carrier frequency offsets

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