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
Iterative Overlap TD-QRM-ML Block Signal Detection for Single-Carrier Transmission without CP Insertion
TL;DR: This paper proposes an iterative overlap TD-QRM-MLBD which requires no CP insertion and evaluates the throughput performance of iterative overlaps by computer simulation to compare it with the conventional TD- QRM- MLBD with CP insertion.
Uplink capacity of a single-carrier multi-user mimo multiplexing in a frequency-selective channel
TL;DR: It is shown that larger uplink capacity can be achieved in a frequency-selective fading channel rather than in afrequency-nonselective fading channels and that almost the same capacity is obtained by ZFD and MMSED.
Patent
Multiple input multiple output (mimo) transmitted signal vector estimation employing monte carlo sampling techniques
TL;DR: In this paper, the authors proposed a method of determining a transmitted vector (x) in a MIMO receiver includes the steps of receiving a received vector (y) representative of the transmitted vector, generating a first random number and forming, in a first iteration, a first symbol of a first candidate vector, the candidate vector representing a potential solution vector.
Proceedings ArticleDOI
Low Complexity Transmit Diversity Scheme for SCFDE Transmissions Over Time-Selective Channels
TL;DR: A low complexity transmit diversity scheme for single carrier-frequency domain equalization (SCFDE) is proposed, which is robust in high time-selective channels, (i.e. in high mobility environments), when the channel cannot be assumed constant over two consecutive processed symbols.
Proceedings ArticleDOI
Adaptive frequency-domain equalization for underwater acoustic communications
TL;DR: Frequency-domain equalization approach is proposed to deal with the intersymbol interference in underwater acoustic communications and an adaptive algorithm is considered using overlap-and-save method to track the time-varying underwater acoustic channel.
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.