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 nakagami fading phase difference distribution and its impact on BER performance
TL;DR: The proposed phase difference between two correlated complex Nakagami random variables (RVs) is proposed and its statistical properties are investigated and it is shown to accurately approximate that of the Ricean.
Journal ArticleDOI
Soft decision-directed MAP estimate of fast Rayleigh flat fading channels
Ming Yan,Bhaskar D. Rao +1 more
TL;DR: An iterative receiver with soft-decision feedback is derived by using the expectation-maximization algorithm for maximum a posteriori estimate of fast Rayleigh flat fading channels and results indicate that in a fast fading environment, the derived receiver can perform better than an iterative Receiver with hard-dec decision feedback.
Journal ArticleDOI
High phase noise tolerant pilot-tone-aided DP-QPSK optical communication systems.
TL;DR: A novel, high phase-noise tolerant, optical dual polarization (DP) quadrature phase-shift keying (QPSK) communication system based on pilot-tone-aided phase noise cancellation (PNC) algorithm and a novel digital signal processing (DSP) algorithm for adaptive pilot tone detection is experimentally demonstrated.
Journal ArticleDOI
A Higher Data-Rate T-DMB System Based on a Hierarchical A-DPSK Modulation
TL;DR: An amplitude differential phase shift keying (A-DPSK) modulation is proposed which is robust to fast fading by estimating only amplitude coefficients of the channel transfer function with the use of amplitude pilots and a noise-reduction scheme of averaging estimated channel coefficients is introduced.
Proceedings ArticleDOI
Impact of imperfect channel state information upon the outage capacity of Rayleigh fading channels
TL;DR: By deriving an expression for the estimation error variance of pilot symbol assisted modulation (PSAM), it is able to establish direct relations among estimation parameters, channel characteristics and its impact on the outage capacity of a Rayleigh flat fading channel.
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.