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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Proceedings ArticleDOI
Generalized Performance Analysis of Adaptive PSAM-Based Transmit-Beamforming for Wireless MIMO systems
Amine Maaref,Sonia Aissa +1 more
TL;DR: The impact of imperfect channel state information (CSI) on the performance of transmit-beamforming (TB) over multiple-input multiple-output (MIMO) Rayleigh fading channels when using constant-power rate-adaptive pilot-symbol-assisted modulation (PSAM), is investigated.
Proceedings ArticleDOI
Effect of channel estimation errors on M-QAM with GSC diversity in fading channels
TL;DR: A novel formulation of the bit error rate (BER) of M-QAM with ICE in terms of the signal-constellation-dependent effective signal-to-noise ratio (SNR) is provided, which allows for the accurate BER results of square and rectangular M- QAM with GSC and channel estimation errors.
Patent
Compensating for fading in analog AM radio signals
TL;DR: In this paper, a fading compensation scheme for time-compressed analog AM signals is presented. But the scheme is not suitable for the case of fading in the transmission channel. But it is possible to estimate the amount of fading that occurred in the transmitted signal by observing the amplitude of the received pilot symbols at discrete points in time, and interpolating to determine the total transmitted signal.
Proceedings Article
Pilot Symbol Design for Channel Estimation in OFDM with Null Subcarriers
TL;DR: The problem of training symbol placement and power for the channel estimation of OFDM over block-fading channel in the presence of null subcarriers is considered and a pilot design is found that results in near-optimal channel estimation.
Proceedings ArticleDOI
BER evaluation of symbol-aided coherent demodulation for Rician and Rayleigh fading channels
Mohamed M. Khairy,E. Geraniotis +1 more
TL;DR: It is established that SAD performance is close to that of perfectly coherent demodulation and significantly better than differentially coherent demmodulation for a wide range of system and channel parameters.
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.