Journal ArticleDOI
An analysis of pilot symbol assisted modulation for Rayleigh fading channels (mobile radio)
TLDR
In this paper, the bit error rate in binary-phase-shift-keying (BPSK) and in quadrature phase-shift keying (QPSK), for a tight upper bound on the symbol error rate for 16-QAM was presented.Abstract:
The author presents pilot-symbol-assisted modulation (PSAM) on a solid analytical basis, a feature missing from previous work. Closed-form expressions are presented for the bit error rate (BER) in binary-phase-shift-keying (BPSK) and in quadrature-phase-shift-keying (QPSK), for a tight upper bound on the symbol error rate in 16 quadrature-amplitude-modulation (16-QAM), and for the optimized receiver coefficients. The error rates obtained are lower than for differential detection for any combination of signal-to-noise ratio (SNR) and Doppler spread, and the performance is within 1 dB of a perfect reference system under slow-fading conditions and within 3 dB when the Doppler spread is 5% of the symbol rate. >read more
Citations
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Book
3G, HSPA and FDD versus TDD Networking: Smart Antennas and Adaptive Modulation
Lajos Hanzo,J.S. Blogh,Song Ni +2 more
TL;DR: In this article, the authors compare the network capacity gains that may be achieved with the advent of adaptive antenna arrays and HSDPA-style adaptive modulation techniques in the context of FDD and TDD CDMA cellular networks.
Proceedings ArticleDOI
Variable rate adaptive trellis coded QAM for high bandwidth efficiency applications in Rayleigh fading channels
TL;DR: A high bandwidth efficiency variable rate adaptive channel coding scheme, ATCQAM, is proposed, which matches the variable modulation level with a variable rate channel coder, the physical bandwidth is maintained constant.
Proceedings ArticleDOI
Low-complexity ICI suppression for OFDM over time- and frequency-selective Rayleigh fading channels
Xiaodong Cai,G.B. Giannakis +1 more
TL;DR: A matched filter bound is derived for OFDM transmissions over doubly-selective Rayleigh fading channels, which benchmarks the best possible performance if ICI is completely cancelled without noise enhancement and low-complexity MMSE and DFE receivers are developed for ICI suppression.
Journal ArticleDOI
Effect of Channel Estimation Errors on $M$ -QAM With MRC and EGC in Nakagami Fading Channels
Yao Ma,Jinghua Jin +1 more
TL;DR: A novel formulation of the bit-error rate (BER) of M-QAM with ICE in terms of the signal constellation-dependent effective signal-to-noise ratios (SNRs) or amplitudes, which allows to derive the general, accurate, and easy- to-evaluate BER formulas for square and rectangular diversity M- QAM with channel estimation errors.
Patent
Cancelling non-linear power amplifier induced distortion from a received signal by moving incorrectly estimated constellation points
John Eric Kleider,Anthony Smith +1 more
TL;DR: In this paper, a method and system for reducing power amplifier induced distortion is provided for the estimation and cancellation of non-linear power amplifiers induced distortion in the received signal, where the difference between the current estimated power amplifier distortion and the previous estimated power amplification distortion is less than a convergence threshold.
References
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Digital communications
TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.
Book
Mobile Communications Engineering
TL;DR: In this article, the authors describe the characteristics of mobile radio signals and apply statistical communication theory to propagation and received signal characteristics, and provide a discussion of system performance and how to evaluate a new system.
Journal ArticleDOI
TCMP-a modulation and coding strategy for Rician fading channels
M.L. Moher,J.H. Lodge +1 more
TL;DR: TCMP is a novel modulation strategy for Rician fading channels that multiplexes a time domain pilot sequence with trellis-coded data to permit coherent detection and is shown to provide remarkably robust performance in the presence of fading.
Proceedings ArticleDOI
Rayleigh fading compensation method for 16QAM in digital land mobile radio channels
S. Sampei,T. Sunaga +1 more
TL;DR: In this paper, a Rayleigh fading compensation method for 16-QAM was proposed, where second-order interpolation was used for the fading compensation, and the degradation due to the proposed fading compensation was about 2 dB.