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
Single Carrier Block Transmission Without Guard Interval
Kazunori Hayashi,Hideaki Sakai +1 more
TL;DR: Computer simulation results show that the proposed scheme can outperform a linear MMSE equalizer with lower computational complexity.
Proceedings ArticleDOI
Successive Interference Cancellation for SC/FDE-MIMO Systems
TL;DR: This paper discusses spatial multiplexing in conjunction with optimal matched filtering and MMSE-equalization for SC/FDE (single carrier transmission with frequency domain equalization), a single carrier technology closely related to OFDM due to its frequency domain signal processing characteristics.
Proceedings ArticleDOI
Performance of Decision-Directed Channel Estimation Using Low-Rate Turbo Codes for DFT-Precoded OFDMA
TL;DR: The proposed decision-directed channel estimation (DDCE) works synergistically with the low-rate turbo code, since the extrinsic LLR at the Max-Log-MAP decoder becomes more reliable due to the increasing coding gain.
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Full-rate cooperative communications with spatial diversity for half-duplex uplink relay channels
TL;DR: Simulation results show that the proposed technique achieves spatial diversity without sacrificing spectral efficiency and outperforms conventional full-rate cooperative communication techniques.
Journal ArticleDOI
Low complexity frequency-domain despreading for cyclic-prefix CDMA systems
Pin-Hsun Lin,Tzi-Dar Chiueh +1 more
TL;DR: A frequency-domain despreading method for the cyclic-prefix code-division multiple-access (CP-CDMA) system is introduced using the orthogonality transformation property of the discrete Fourier transform, which shows that the proposed architecture can save a large amount of computation.
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
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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.