Journal ArticleDOI
Frequency domain equalization for single-carrier broadband wireless systems
Reads0
Chats0
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
More filters
Patent
Full duplex backhaul radio with transmit beamforming and SC-FDE modulation
TL;DR: In this article, an intelligent backhaul radio is proposed that is compact, light and low power for street level mounting, operates at 100 Mb/s or higher at ranges of 300 m or longer in obstructed LOS conditions with low latencies of 5 ms or less, supports PTP and PMP topologies, uses radio spectrum resources efficiently and does not require precise physical antenna alignment.
Patent
Orthogonal multiple access and non-orthogonal multiple access
TL;DR: In this paper, an enhanced discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) was proposed to increase processing gain and reduce peak-to-average power ratio (PAPR).
Proceedings ArticleDOI
Performance of star 16QAM using iterative decision-directed channel estimation for DFT-precoded OFDMA
TL;DR: Computer simulation results show that for the star 16QAM scheme, the average block error rate (BLER) using the iterative DDCE is very close to that with ideal channel estimation for a low channel coding rate such as an R = 1/3 turbo code.
Proceedings ArticleDOI
Decision feedback equalization in the context of enhanced high rate mobile communications systems - based on the concept of SC/FDE
H. Witschnig,R. Weigel +1 more
TL;DR: It is pointed out that it is inevitable to characterize decision feedback equalizer structures (DFE) in the context of channel characteristics, error propagation and implementation effort before talking of performance gain compared to linearequalizer structures.
Proceedings ArticleDOI
Downlink Site Diversity with Frequency-Domain Equalization for a DS-CDMA Cellular System
TL;DR: The downlink site diversity with FDE is presented for a DS-CDMA cellular system and the MMSE weight for site diversity combining is derived and it is shown that the link capacity is better than that with coherent rake combining.
References
More filters
Book
Adaptive Filter Theory
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
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.