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 single-carrier modulation system based on the fractional fourier domain equalization in aeronautical channels
TL;DR: This paper proposes a signal carrier modulation systems with equalization based on the fractional Fourier transform (SC-FRFDE), in which the feed-back link is not necessary and the system can significantly improve the performance of SC-FDE system.
Space-Frequency Equalization in Broadband Single Carrier Systems
TL;DR: This research investigates and develops low-complexity frequency domain receiver architectures capable of suppressing both CCI and ISI and employing practical channel estimation, and develops an iterative QR-decomposition based parameter estimation algorithm which yields performance improvement over the non-iterative parameter estimation algorithms.
Journal ArticleDOI
Parallel multistage decision feedback equalizer for single-carrier layered space-time systems in frequency-selective channels
TL;DR: Simulation results show that the PMDFE outperforms MIMO-OFDM and previously existing equalizers for single-carrier layered space-time systems.
Proceedings ArticleDOI
Is the cyclic prefix necessary
Naresh Sharma,Ashok Armen Tikku +1 more
TL;DR: It is shown that one can do away with the cyclic prefix (CP) for SC-FDE and OFDM at the cost of a moderate increase in complexity of a DFT-based receiver.
Proceedings ArticleDOI
Which one is more sensitive to carrier frequency offsets - OFDMA or SC-FDMA?
TL;DR: It is shown that the performance of grouped allocation and interleaved allocation becomes similar in the presence of CFOs as opposed to the perfect synchronization scenario, and the performance degradation due to CFO is relatively small for SC-FDMA with zero forcing equalization.
References
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TL;DR: In this paper, the authors propose a recursive least square adaptive filter (RLF) based on the Kalman filter, which is used as the unifying base for RLS Filters.
Journal ArticleDOI
Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing
TL;DR: The analysis and simulation of a technique for combating the effects of multipath propagation and cochannel interference on a narrow-band digital mobile channel using the discrete Fourier transform to orthogonally frequency multiplex many narrow subchannels, each signaling at a very low rate, into one high-rate channel is discussed.
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
Polyphase codes with good periodic correlation properties (Corresp.)
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.