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
CFO mitigation for uplink SFBC SC-FDMA
Naveed Iqbal,Azzedine Zerguine +1 more
TL;DR: A three-tap adaptive frequency-domain decision feedback equalizer (AFD-DFE) that exploits the banded and sparse structure of the equivalent channel matrix to mitigate inter-carrier interference due to large carrier frequency offset (CFO).
Journal ArticleDOI
A Comparative Study on Time Domain Sequential Equalizer with MLD and MLSE Equalizer on MIMO Frequency Selective Channels
TL;DR: Two receiver structures for spatially multiplexed transmission on MIMO frequency selective fading channels are investigated and the bit error rates of two time domain receivers are examined through computer simulations and their BER characteristics are compared.
Journal ArticleDOI
Iterative frequency-domain channel estimation and equalization for ultra-wideband systems with short cyclic prefix
Salim Bahceci,Mutlu Koca +1 more
TL;DR: A novel iterative receiver employing soft IBI estimation and cancellation within both its FD channel estimator and FD equalizer components is proposed and it is shown by simulation results that the proposed FD receiver attains performances close to that of the full CP case in both line-of-sight (LOS) and non-line- of- Sight (NLOS) UWB channels after only a few iterations.
Proceedings ArticleDOI
Interference Cancellation for Single Carrier Frequency Domain Equalizer without Cyclic Prefix
TL;DR: A method to mitigate the interferences for single carrier frequency domain equalizer (SC-FDE) without cyclic prefix (CP) outperforms that of conventional CP reconstruction method, and it is verified by computer simulations.
Proceedings ArticleDOI
Blind and Semiblind Channel Estimation for Single-Carrier Block Transmission Systems Using Few Received Blocks
Wen-Jun Zeng,Xi-Lin Li,En Cheng +2 more
TL;DR: The blind and semiblind channel estimation and equalization are investigated for zero-padding single-carrier block transmission (ZP-SCBT) systems using second-order statistics to demonstrate that the performance of the proposed approach is superior to the subspace-based blind methods.
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
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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.