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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Proceedings ArticleDOI
Performance of MRC and EGC M-QAM with imperfect channel estimation
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 is provided, which allows for the general, accurate, and easy- to-evaluate BER formulas for square and rectangular diversity M- QAM with channel estimation errors.
Proceedings ArticleDOI
Extended MLSE diversity receiver for the time- and frequency-selective channel
B. Hart,Desmond P. Taylor +1 more
TL;DR: This paper develops an MLSE diversity receiver for the time- and frequency-selective channel corrupted by additive Gaussian noise, when linear constellations are employed.
Proceedings ArticleDOI
A hybrid CME-LS channel estimation approach for broadband MIMO-OFDM systems
Zhen Lu,Anthony Kadi,Tim Aubrey +2 more
TL;DR: A channel estimation approach yielding both channel gains and the number of multi-paths is presented and results indicate that the new algorithm is superior in channel order estimation to the MDL algorithm in MMO-OFDM system over a noisy frequency selective fading channel.
Proceedings ArticleDOI
An effective perceptual weighting model for videophone coding
TL;DR: A perceptual weighting model is proposed for effective rate control so as to enhance the perceptual coding quality of videophone and uses luminance adaptation and texture masking as the stimulus-driven factors, while skin color serves as the cognition-driven factor in the videophone application.
Journal ArticleDOI
Doppler estimation based on frequency average and remodulation for underwater acoustic communication
TL;DR: This paper proposes more reliable Doppler estimation method based on frequency average and remodulation and conducts simulation and sea trial to evaluate the performance of the proposed method.
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.