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
Frame synchronization for PSAM on Rayleigh fading channels
TL;DR: Investigating optimum and sub-optimum frame synchronization techniques for the case of an M-QAM data symbol set and a PSK pilot sequence to find the pilot symbols.
Dissertation
Ultra Wideband OFDM Systems: Channel Estimation and Improved dtection Accounting for Estimation Inaccuracies
TL;DR: An improved maximum likelihood (ML) detection metric taking into account the presence of channel estimation errors is formulated and a modified iterative detector based on maximum a posteriori (MAP) which mitigates the effect of channel uncertainty on the detector performance is proposed.
Journal Article
Optimal Pilot Placement for Semi-Blind Channel Tracking of Packetized Transmission over Time-Varying Channels ∗
TL;DR: The problem of optimal placement of pilot symbols is considered for single carrier packet-based transmission over time varying channels and it is shown that, at high SNR, either performance metric is minimized by distributing the pilot clusters throughout the packet periodically.
Journal ArticleDOI
On Performance of Multicast Delivery with Fixed WiMAX Telemedicine Networks Using Single- Carrier Modulation
Bernard Fong,Guan Yue Hong +1 more
TL;DR: The performance of QAM schemes used in a fixed WiMAX system that supports multicast distribution of .real-time traffic for healthcare services is analyzed by evaluation of system performance on a 10 GHz carrier.
Proceedings ArticleDOI
Frequency-domain channel estimation using FFT/IFFT for DS-CDMA mobile radio
Shinsuke Takaoka,Fumiyuki Adachi +1 more
TL;DR: This paper studies a code-multiplexed pilot-assisted frequency-domain channel estimation using FFT/IFFT, which has a good tracking capability against fast fading and can reduce the effect of noise and interpath interference.
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.