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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Patent
Channel estimation device, and cdma receiver and cdma transmitter/receiver having the device
TL;DR: In this article, the positions of the pilot symbols in the synthesized symbol sequence are found and the average values of pilot symbols included in the pilot block are appropriately weighted and summed up to obtain the channel estimation values of the data symbols.
Journal ArticleDOI
A postdistortion receiver for mobile communications
TL;DR: A unique adaptation method is demonstrated to compensate for slow variations in the power amplifier's characteristics without an interruption for a training period, and the spectral efficiency is approximately increased by 20% with the postdistortion implementation.
Journal ArticleDOI
On the Elementwise Convergence of Continuous Functions of Hermitian Banded Toeplitz Matrices
TL;DR: The present correspondence derives new theoretical results regarding the convergence of a single entry of a continuous function of a Toeplitz matrix.
Journal ArticleDOI
Coded DS-CDMA systems with iterative channel estimation and no pilot symbols
TL;DR: An expectation-maximization channel-estimation algorithm for the fading amplitude, phase, and the interference power spectral density (PSD) due to the combined interference and thermal noise is proposed for DS-CDMA systems with irregular repeat-accumulate codes.
Proceedings ArticleDOI
Cutoff rate analysis of the Gauss-Markov fading channel with adaptive energy allocation
TL;DR: The cutoff rate is use to analyze reliable rates over the first-order Gauss-Markov fading channel when an optimized pilot-symbol assisted modulation (PSAM) scheme is used to provide partial CSI to the receiver.
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.