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
The effect of constellation density on trellis coded modulation in fading channels
TL;DR: It is demonstrated that dense constellations can actually improve performance and that uncoded QPSK is much poorer than either TCM 16-QAM or TCM 8-PSK.
Proceedings ArticleDOI
Reduced-complexity synchronization for high-order coded modulations
Marco Martalo,Gianluigi Ferrari,M. Asim,Jonathan Gambini,Christian Mazzucco,Giacomo Cannalire,Sergio Bianchi,Riccardo Raheli +7 more
TL;DR: An efficient Maximum A-posteriori Probability (MAP) iterative synchronization algorithm, where detection and decoding are performed separately from phase estimation, is proposed, which entails a negligible energy efficiency loss with respect to optimized joint decoding and phase estimation approaches.
Book ChapterDOI
Block-by-Block Channel and Sequence Estimation for ISI/Fading Channels
TL;DR: This work looks at the well studied problems of sequence estimation in unknown or fading channels, and introduces yet another set of algorithms that have reasonable complexity and perform well even in fast changing environments.
Proceedings ArticleDOI
Phase noise compensation for dually-polarized systems with independent transmission streams
Marco Martalo,Gianluigi Ferrari,M. Asim,Jonathan Gambini,Christian Mazzucco,Giacomo Cannalire,Sergio Bianchi,Riccardo Raheli +7 more
TL;DR: An innovative Minimum Mean Square Error (MMSE)-based iterative synchronization algorithm is devised for a dually-polarized wireless link, affected by phase noise and Cross-Polarization Interference, with independent transmission streams over the two polarizations.
Synchronization and Channel Estimation in OFDM Systems
TL;DR: “ 하나가 OFDM (Orthogonal frequency division multiplexing)”, 기법이며, 여러 국제 표준단체에서, 효율적으로 대처할 수
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.