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
New direction of broadband wireless technology
Fumiyuki Adachi,Eisuke Kudoh +1 more
TL;DR: This paper will discuss about some important 4G wireless techniques, including wireless multi-hop technique, which is a possible solution to transmit power reduction for broadband data transmissions.
Journal ArticleDOI
Optimal training sequences for channel estimation in cyclic-prefix-based single-carrier systems with transmit diversity
TL;DR: This work investigates a new class of training sequences that are optimal for least squares (LS) channel estimation in systems employing transmit diversity and single-carrier (SC) modulation with a cyclic prefix (CP) extension that are orthogonal in the frequency domain.
Journal ArticleDOI
Experimental demonstration of improved fiber nonlinearity tolerance for unique-word DFT-spread OFDM systems
TL;DR: It is shown that DFT-S OFDM can achieve an improvement of 1 dB in Q factor and 1dB in launch power over conventional OFDM.
Journal ArticleDOI
SC-FDMA with iterative multiuser detection: improvements on power/spectral efficiency
TL;DR: GFDMA allows multiple users to share a common set of subcarriers and separates the signals of users by employing distinct interleavers and frequency-domain multiuser detection, and offers advantages over SC-FDMA with respect to power/spectral efficiency.
Proceedings ArticleDOI
Peak Power Characteristics of Single Carrier FDMA MIMO Precoding System
TL;DR: This paper describes how to apply TxBF to an SC-FDMA system and shows its effect on PAPR, and considers the effects of precoder averaging across subcarriers and quantization, typically used to reduce feedback overhead, on the P APR.
References
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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.