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
Cochannel interference and pilot symbol assisted modulation
James K. Cavers,J. Varaldi,P. Ho +2 more
TL;DR: In this article, the authors presented the first analytical investigation of the performance of pilot symbol assisted modulation (PSAM) in fading, interference and noise, in addition to the exact solution, it provides an approximation that is indistinguishable from the exact result but reduces the computation time from days to seconds.
Proceedings ArticleDOI
Optimal Turbo-Blast Detection of MIMO-OFDM Systems with Imperfect Channel Estimation
TL;DR: Numerical results, presented for the case of Rayleigh block fading, demonstrate that the proposed detector can achieve significant performance improvement compared to the classically-used mismatched detector and this improvement is obtained with almost no increase in the receiver complexity.
Proceedings ArticleDOI
Near Optimal Channel Estimation for OFDM in Fast Fading Channels
TL;DR: A low-complexity iterative receiver combining joint iterative channel estimation with symbol detection is proposed for coded orthogonal frequency division multiplexing (OFDM) systems in fast fading channels with Doppler frequencies up to 15% of the OFDM symbol rate.
Proceedings ArticleDOI
A Method for Joint Peak-to-Average Power Ratio Reduction and Synchronization in OFDM
TL;DR: In harsh peak-limited channels it is shown that JSPS-SLM can achieve large bit error rate (BER) performance gains and joint synchronization pilot sequence (JSPS) selected mapping (SLM), which is a joint PAR reduction and synchronization scheme.
Patent
Variable-interval pilot symbol aided modulation and demodulation
TL;DR: In this paper, the residual uncertainty in the carrier frequency decreases after an initial carrier frequency estimate is made during an initial signal interval, which allows a commensurate reduction in channel process sampling rate during the remainder of the message; i.e., the frequency uncertainty of the pilot symbols can be decreased.
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.