NDLI: Two-stage frequency-domain oversampling receivers for cyclic prefix orthogonal frequency-division multiplexing systems

Content Provider	IET Digital Library
Author	Yan, Yanxin Gong, Yi Ma, Maode
Abstract	Orthogonal frequency-division multiplexing (OFDM) is a widely adopted technique in most wireless applications. It has been shown that zero padded OFDM (ZP-OFDM) with frequency-domain oversampling (FDO) can exhibit better performance than cyclic prefix OFDM (CP-OFDM) if the whole OFDM symbol is oversampled in the frequency domain. In this study, the authors propose a novel FDO-based scheme for CP-OFDM, which consists of two stages. First, the conventional CP-OFDM receiver is adopted to estimate the transmitted data and channel information. Second, the received symbol is reconstructed to reduce inter-symbol interference and oversampled in the frequency domain. The proposed scheme combines FDO and symbol reconstruction together, which enables the minimum mean square error (MMSE) and zero forcing (ZF) equalisers to exploit the channel information in high-dimensional non-orthogonal subcarrier domain and thus significantly suppress the interference on multipath channels. Simulation results show that the proposed FDO-MMSE CP-OFDM receiver can achieve much better bit error rate performance than the traditional CP-OFDM receiver and is comparable to the ZP-OFDM receiver with FDO.
Starting Page	1246
Ending Page	1254
Page Count	9
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 10, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0811
Journal	IET Communications
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bit Error Rate Performance Channel Estimation Channel Information Estimation Communication Channel Equalisation And Identification Cyclic Prefix Orthogonal Frequency-division Multiplexing System Electromagnetic Compatibility Equaliser Error Statistics FDO-based Scheme FDO-MMSE CP-OFDM Receiver Interference Interference Suppression Interpolation And Function Approximation Intersymbol Interference Intersymbol Interference Reduction Least Mean Squares Method Minimum Mean Square Error Equaliser MMSE Equaliser Modulation And Coding Method Multipath Channel Nonorthogonal Subcarrier Domain Numerical Analysis OFDM Modulation Radio Frequency Interference Radio Link And Equipment Radio Receiver Statistics Transmitted Data Estimation Two-stage Frequency-domain Oversampling Receiver Zero Forcing Equaliser Zero Padded OFDM ZF Equaliser ZP-OFDM
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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