Journal ArticleDOI
Frequency domain equalization for single-carrier broadband wireless systems
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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 Two-Dimensional Channel Estimation Algorithm for SC-FDE Systems
TL;DR: A novel time-frequency domain two-dimensional MMSE channel estimation (2D-MMSE) algorithm based on separation property of mobile wireless channels is proposed in this paper to provide the current channel state knowledge and improve the spectral efficiency in Single Carrier Frequency Domain Equalization (SC-FDE) systems over frequency-selective channels.
Proceedings ArticleDOI
Iterative Decision-Feedback Hybrid Equalization in SC-FDM
TL;DR: In this paper , an iterative equalization algorithm is proposed based on various equalization criteria in different iterative steps and shown to improve error performance in equalized symbol decision over Rician multipath channels.
A frequency-domain receiver for asynchronous systems employing CP-assisted DS-CDMA schemes
Rui Dinis,Paulo Silva +1 more
TL;DR: The proposed receiver is suitable for broadband wireless systems, with performances that can be close to the single-user MFB (Matched Filter Bound), even for fully loaded systems and/or in the presence of strong interfering signals.
Proceedings ArticleDOI
Robust frequency-domain channel estimation and detection for ultra-wideband signals under non-Gaussian noise
TL;DR: The receiver is shown to outperform the linear receiver architecture that is designed to be optimum under additive white Gaussian noise substantially under non-Gaussian noise without any significant additional cost in complexity.
Proceedings ArticleDOI
Layered Space-Frequency Equalization with Time Domain Noise Prediction for a Single-Carrier Multiple-Input Multiple-Output System
TL;DR: An alterable feedback taps LSFE-NP scheme is outlined for the coded SC MIMO system, which can feed as many reliable decisions as possible back to the equalizer to achieve better performance.
References
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Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing
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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.