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
A space-time coding modem for high-data-rate wireless communications
TL;DR: The theory and practice of a new advanced modem technology suitable for high-data-rate wireless communications and its performance over a frequency-flat Rayleigh fading channel are presented and it is concluded that STCM can provide significant SNR improvement over simple delay diversity.
Journal ArticleDOI
Optimal training for block transmissions over doubly selective wireless fading channels
TL;DR: This work designs low-complexity optimal PSAM for block transmissions over doubly selective channels using a basis expansion channel model and maximizes a tight lower bound on the average channel capacity that is shown to be equivalent to the minimization of the minimum mean-square channel estimation error.
Journal ArticleDOI
Intercarrier interference in MIMO OFDM
TL;DR: This paper develops a model for multicarrier transmission over time-varying channels and focuses particularly on multiple-input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM), and proposes a time-domain approach to channel estimation.
Journal ArticleDOI
On energy provisioning and relay node placement for wireless sensor networks
TL;DR: A heuristic algorithm, called Smart Pairing and INtelligent Disc Search (SPINDS), is developed that effectively transform a complex MINLP problem into a linear programming (LP) problem without losing critical points in its search space.
Book
Turbo Coding, Turbo Equalisation and Space-Time Coding for Transmission over Fading Channels
TL;DR: This paper presents a Comparative Study of Turbo Equalisers: The Super Trellis Structure of Convolutional Turbo Codes and the Coded Modulation Theory and 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.