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
Systems/methods of conducting a financial transaction using a smartphone
TL;DR: In this article, a mobile device such as a smartphone can be configured to communicate with a base station, using a first mode, and to connect with an access point using a second mode that comprises a level of security exceeding that of the first mode.
Journal ArticleDOI
Novel Pilot Position Detection for SC-FDE Systems With Frequency Domain Pilot Multiplexing Technique
TL;DR: A novel PPD scheme based on the maximum-likelihood criterion is proposed that significantly improves the PPD accuracy and outperforms the existing counterparts in terms of bit error rate.
Journal Article
Evaluating a new subcarrier mapping ICI-SC scheme using linear maximum likelihood alamouti combiner (LMLAC) decoding technique
TL;DR: The simulation results showed that the proposed subcarrier mapping scheme ICI-SC has the ability to reduce ICI effectively with a low decoding complexity and maximum diversity in terms of bandwidth efficiency and also in the bit error rate (BER) performance especially at high signal to noise ratio.
Proceedings ArticleDOI
Interference Reduction in Multicarrier CDMA Via Blind Minimum Variance Multiuser Detector
TL;DR: Results are presented indicating that for BPSK, 16QAM, and 64QAM modulation, the probability of error and capacity are nearly identical to the LMS MMSE approach provided that perfect channel side information (CSI) is available at the receiver.
Journal ArticleDOI
Energy Efficiency of Power-Adaptive Spatial Diversity Methods
TL;DR: The energy efficiency of power-adaptive multipleinput multiple-output (MIMO) diversity methods is studied and it is shown that larger diversity in the spatial or frequency domain improves the average PA efficiency in a system with channel inversion.
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.