NDLI: A new coherent demodulation technique for land-mobile satellite communications

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A new coherent demodulation technique for land-mobile satellite communications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Yoshida, Shousei Tomita, Hideho
Copyright Year	1990
Description	An advanced coherent demodulation technique is described for land mobile satellite (LMS) communications. The proposed technique features a combined narrow/wind band dual open loop carrier phase estimator, which is effectively able to compensate the fast carrier phase fluctuation by fading with sacrificing a phase slip rate. Also included is the realization of quick carrier and clock reacquisition after shadowing by taking open loop structure. Its bit error rate (BER) performance is superior to that of existing detection schemes, showing a BER of 1 x 10(exp -2) at 6.3 dB E sub b/N sub o over the Rician channel with 10 dB C/M and 200 Hz (1/16 modulation rate) fading pitch f sub d for QPSK. The proposed scheme consists of a fast response carrier recovery and a quick bit timing recovery with an interpolation. An experimental terminal model was developed to evaluate its performance at fading conditions. The results are quite satisfactory, giving prospects for future LMS applications.
File Size	387517
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920014930
Archival Resource Key	ark:/13960/t5p89622w
Language	English
Publisher Date	1990-01-01
Access Restriction	Open
Subject Keyword	Communications And Radar Signal Fading Frequency Modulation Statistical Analysis Bit Error Rate Estimating Error Correcting Codes Shadows Phase Shift Keying Interpolation Land Mobile Satellite Service Signal Detection Satellite Communication Demodulation Clocks Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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