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
Field Experiments on Closed-Loop SU-MIMO Transmission Considering Effect of Antenna Configurations in LTE-Advanced Uplink
TL;DR: Experimental results show that when 2-by-2 Rank-2 SU-MIMO, i.e., spatial multiplexing, is applied, a cross-polarized antenna configuration exhibits better throughput performance compared to that using co- polarized antennas and the location probability for achieving throughput greater than 200 Mbps is clearly increased.
Proceedings ArticleDOI
Multi‐user detection in OFDM systems using CDMA and multiple antennas
Christoph Degen,Lars Brühl +1 more
TL;DR: In this paper, the authors examined multiuser detection in OFDM systems and compared them with single-carrier transmission using equalization in the frequency domain (SC/FDE).
Proceedings ArticleDOI
An adaptive antenna array for single carrier modulation system with cyclic prefix
TL;DR: In this paper, an adaptive antenna array is applied to the SC-CP system, and the optimum weights control method is proposed, and to verify the performance of the proposed method, some weights control methods, originally proposed for the orthogonal frequency division multiplexing (OFDM) adaptive array, are applied and their performances are studied and compared with the proposed system.
Proceedings ArticleDOI
Decision Feedback Channel Estimation Scheme Using Terminal Speed for Single-Carrier Frequency-Domain Equalization
Hirotaka Mihara,Fumiaki Maehara +1 more
TL;DR: An adaptive decision feedback channel estimation (DFCE) scheme using the knowledge of terminal speed in single-carrier frequency-domain equalization (SC-FDE) to theoretically derive the effect of time selective fading by using the terminal speed and to detect the actual channel condition.
Proceedings ArticleDOI
The Effect of Cyclic Intersymbol Interference of Frequency-Domain Decision-Feedback Equalizer
Rih-Lung Chung,Jeng-Kuang Hwang +1 more
TL;DR: This paper investigates an inherent but adverse phenomenon called cyclic intersymbol interference (cyclic ISI) occurred in frequency-domain decision-feedback equalizer (FD-DFE) due to the cyclic-prefix insertion and modulo operation of the time-domain feedback filter.
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.