Journal ArticleDOI
Frequency domain equalization for single-carrier broadband wireless systems
TLDR
This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions and discusses similarities and differences of SC and OFDM systems and coexistence possibilities, and presents examples of SC-FDE performance capabilities.Abstract:
Broadband wireless access systems deployed in residential and business environments are likely to face hostile radio propagation environments, with multipath delay spread extending over tens or hundreds of bit intervals. Orthogonal frequency-division multiplex (OFDM) is a recognized multicarrier solution to combat the effects of such multipath conditions. This article surveys frequency domain equalization (FDE) applied to single-carrier (SC) modulation solutions. SC radio modems with frequency domain equalization have similar performance, efficiency, and low signal processing complexity advantages as OFDM, and in addition are less sensitive than OFDM to RF impairments such as power amplifier nonlinearities. We discuss similarities and differences of SC and OFDM systems and coexistence possibilities, and present examples of SC-FDE performance capabilities.read more
Citations
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Proceedings ArticleDOI
A novel frequency domain equalization method for single-carrier wireless transmissions over doubly-selective fading channels
B.K. Ng,David Falconer +1 more
TL;DR: A novel iterative frequency domain equalization method which relies on a sliding-window-based MMSE widely-linear filter with inter-carrier interference cancellation, and iterated time-domain soft-decisions that outperforms the high-complexity linear block MMSE equalizer and other iterative approaches of similar complexity.
Patent
Frequency domain channel estimation in a single carrier frequency division multiple access system
TL;DR: In this article, a channel estimator for a receiver node receiving signals from a plurality of user terminals is presented, where each user terminal is allotted a respective set of transmission subcarriers and respective test signal sequences for transmission over the channel to be estimated.
Journal ArticleDOI
Widely linear MMSE precoding and equalization techniques for SC-FDE systems
TL;DR: Simulation results show that together with the error performance gain, these SC-FDE systems have lower sensibility to the feedback filter length in systems using decision-feedback equalizers, and in Tomlinson-Harashima precoded systems, the performance gain is observed even with channel estimation/channel state information errors.
Journal ArticleDOI
Efficient design of block adaptive equalization and diversity combining for space-time block-coded single-carrier systems
Jong-Seob Baek,Jong-Soo Seo +1 more
TL;DR: A weighted space-time block-coding (STBC)-like matrix-wise block adaptive frequency-domain equalization (WSB-FDE) is proposed for the cyclic-prefixed STBC single-carrier systems equipped with a diversity combining.
Proceedings ArticleDOI
Blind Channel Identification for MIMO Single Carrier Zero Padding Block Transmission Systems
Yi-Sheng Chen,Ching-An Lin +1 more
TL;DR: The design of the precoding sequence which minimizes the noise effect in covariance matrix estimation is proposed and the effect of the optimal precode sequence on channel equalization is discussed.
References
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Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing
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Journal ArticleDOI
BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise
TL;DR: In this contribution the transmission of M-PSK and M-QAM modulated orthogonal frequency division multiplexed (OFDM) signals over an additive white Gaussian noise (AWGN) channel is considered and the degradation of the bit error rate is evaluated.
Journal ArticleDOI
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TL;DR: This correspondence describes the construction of complex codes of the form exp i \alpha_k whose discrete circular autocorrelations are zero for all nonzero lags.