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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Journal ArticleDOI
Study on Common Phase Offset Tracking Scheme for Single Carrier System with Frequency Domain Equalization
TL;DR: In this article, a common phase offset (CPO) tracking in frequency domain is proposed to track CPO, constant amplitude zero autocorrelation code sequence as training sequence is adopted.
Book ChapterDOI
Long Term Development of Air Interfaces: Is It CDMA or OFDM?
TL;DR: Looking into the future to predict the ICT and define the long term research objectives to make it come true is a necessary and also exciting exercise, but it must be based on a clear understanding of the current development path, relieved from myths and misconceptions.
Proceedings Article
Performance comparisons of localized and distributed transmissions using iterative decision-directed channel estimation in DFT-precoded OFDMA
TL;DR: This paper proposes distributed transmission with affinity to resource block (RB) based resource assignment in order to gain the frequency diversity effect for DFT-precoded OFDMA in a frequency-selective fading channel and applies iterative decision-directed channel estimation to the RB based distributed transmission to decrease the channel estimation error.
Journal ArticleDOI
Performance Evaluation of Joint MLD with Channel Coding Information for Control Signals Using Cyclic Shift CDMA and Block Spread CDMA
TL;DR: Joint maximum likelihood detection using channel coding information for orthogonal code division multiple access (CDMA) to decrease the required average received signal-tonoise power ratio (SNR) satisfying the target block error rate (BLER), and investigates the effect of joint MLD from the conventional coherent detection associated with channel coding.
A Robust Channel Estimation for SCFDMA System
TL;DR: In this article, a robust technique for a single carrier frequency division multiple access system (CDMA) channel estimation in flat-fading non-Gaussian channels is proposed, and a new M-estimator is proposed for the robustification of the proposed detector.
References
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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.