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
On Designing Time-Multiplexed Pilots for Doubly-Selective Channel Estimation using Discrete Prolate Spheroidal Basis Expansion Models
Liying Song,Jitendra K. Tugnait +1 more
TL;DR: Channel estimation for single-input single-output frequency- and time-selective channels is considered using time- multiplexed training and the issue of training power allocation is addressed.
Journal ArticleDOI
High efficiency narrowband wireless modems for its applications
J. Grimm,Michael P. Fitz,James V. Krogmeier,Tai-Ann Chen,Tim Magnusen,J.A. Gansman,Wen-Yi Kuo +6 more
TL;DR: A review of data communications concepts essential in the design of wireless modems for the ITS 220 MHz spectral allocations is presented and an architecture for such modems which offers spectral efficiency much higher than that available in current products is proposed.
Proceedings ArticleDOI
Analysis of Adaptive Pilot Symbol Assisted Modulation with Optimized Pilot Symbol Spacing for Rayleigh Fading Channel
TL;DR: Study has been carried out for optimized pilot symbol spacing in PSAM to maximize the spectral efficiency and a considerable improvement in terms of Mean Square Error, Bit Error rate and Average Spectral Efficiency has been achieved.
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.