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
Multicarrier coherent communications for the underwater acoustic channel
E. Bejjani,J.-C. Belfiore +1 more
TL;DR: A multicarrier transmission scheme for severely spread channels-but not overspread, using the technique of orthogonal data and pilot symbols and therefore the use of QAM signal constellations is proposed.
Journal ArticleDOI
Does Fast Adaptive Modulation Always Outperform Slow Adaptive Modulation
Laura Toni,Andrea Conti +1 more
TL;DR: The analysis shows that, despite the lower complexity and feedback rate, slow adaptive modulation (SAM) can achieve higher spectral efficiency than fast adaptive modulation(FAM) in the presence of energy constraint, diversity, and non-ideal channel estimation.
Patent
Estimating frequency-offsets and multi-antenna channels in MIMO OFDM systems
Georgios B. Giannakis,Xiaoli Ma +1 more
TL;DR: In this article, a wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols, and a modulator outputs a wireless signal in accordance with the blocks.
Journal ArticleDOI
MIMO channel estimation in correlated fading environments
Yen-Chih Chen,Yu T. Su +1 more
TL;DR: This paper presents two analytic correlated multiple-input multiple-output (MIMO) block fading channel models and their time-variant extensions that encompass the popular Kronecker model and the more general Weichselberger model as special cases.
Journal ArticleDOI
Improved bayesian MIMO channel tracking for wireless communications: incorporating a dynamical model
K. Huber,Simon Haykin +1 more
TL;DR: This paper investigates the improved decoder performance offered by incorporating dynamic linear modelling techniques when applied to particle filters for use in tracking the MIMO wireless channel by modelling the channel fading rate as a Markov random walk.
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.