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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Journal ArticleDOI
SER Analysis of QAM with Space Diversity in Rayleigh Fading Channels
TL;DR: In this paper, the symbol error probability for quadrature amplitude modulation (QAM) with L-fold space diversity in Rayleigh fading channels was derived by averaging the symbol errors of M-ary QAM in additive white Gaussian noise (AWGN) channel over a chi-square distribution with 2L degrees of freedom.
Journal ArticleDOI
Iterative Channel Estimation Based on B-splines for Fast Flat Fading Channels
TL;DR: Novel low-complexity iterative channel estimators based on B-splines with as few as seven weighting coefficients capable of achieving MSE and BER performance comparable to those of the Wiener filter and the spheroidal basis expansion are proposed.
Journal ArticleDOI
BER and Optimal Power Allocation for Amplify-and-Forward Relaying Using Pilot-Aided Maximum Likelihood Estimation
TL;DR: Bit error rate (BER) and outage probability for amplify-and-forward (AF) relaying systems with two different channel estimation methods, disintegrated channel estimation and cascaded channel estimation, using pilot-aided maximum likelihood method in slowly fading Rayleigh channels are derived.
Journal ArticleDOI
Pilot-assisted 16-level QAM for wireless video
TL;DR: A twin- class pilot-assisted fade-estimation technique that can gracefully reduce the power loss caused by the transmission of pilot overhead is developed and the performance of the partitioning scheme for transmission of video signals using the twin-class 16-QAM transmission system is evaluated under multipath fading conditions.
Patent
Methods and apparatus for multiple-antenna communication of wireless signals with embedded pilot signals
TL;DR: In this paper, a third order or higher order polynomial parameterization of pilot subcarriers in conjunction with a convex optimization algorithm is used to produce pilot signals having near-optimal channel estimate mean square error (MSE) performance.
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.