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
Asymptotic Optimality of Equal Power Allocation for Linear Estimation of WSS Random Processes
TL;DR: This letter establishes the asymptotic optimality of equal power allocation for measurements of a continuous wide-sense stationary (WSS) random process with a square-integrable autocorrelation function when linear estimation is used on equally-spaced measurements.
Proceedings ArticleDOI
Performance evaluation of uplink transmission using space time block coding and beamforming
D. Arora,P. Agathoklis +1 more
TL;DR: Simulation results suggest that in high noise and fading environment the diversity achieved by using large number of antennas combats BER more efficiently than beamforming, while in low fading environment beamforming plays an important role in reducing BER by minimizing the effect of interference from other cochannel users.
A Novel Method of Channel Estimation for WCDMA
TL;DR: In this article, a method of interpolation on a second-order curve using the instantaneous channel estimation of two successive slots based on least-squeeze-based method is presented.
Journal ArticleDOI
Data Detection with Imperfect CSI using Averaged Likelihood Function
TL;DR: The use of the averaged likelihood function to take into account the reliability of the channel estimate is considered, and the resulting detection approach, called the maximum averaged likelihood (MAL), can be seen as an extension of the generalized likelihood ratio test (GLRT) detection.
Proceedings ArticleDOI
On the Performance of Closed-Loop Transmit Diversity with Noisy Channel Estimates
TL;DR: Close-form expressions of the bit error probability of closed-loop transmit diversity schemes with two transmit antennas and noisy channel estimates in time-varying Rayleigh fading channels are derived and it is indicated that, with the same channel estimation accuracy, PA-CLTD generally performs slightly better than PO- CLTD.
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.