By Topic

A comparison study of low bit rate DE-QPSK, TCM 8-ary PSK and 16-ary DE-QAM fully digital demodulators operating over a land mobile satellite link

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Fines, P. ; Dept. of Electron. & Electr. Eng., King''s Coll., London Univ., UK ; Aghvami, A.H.

A complete structure of a fully digital low bit rate m-ary PSK and m-ary QAM demodulator, is given. Its architecture is optimised for applications in a land mobile satellite environment, where flat Rician fading, large Doppler shifts and low E b/N o are the main channel impairments. A power efficient 9.6 Kb/s differentially encoded (DE) QPSK and trellis coded modulated (TCM) 8-ary PSK as well as a bandwidth efficient 64 Kb/s DE 16-ary QAM fully digital demodulators are considered as application examples. All of them have similar architecture with the only difference being their decision units and the absence of fine automatic gain control for the PSK schemes. The authors consider the digital implementation using digital signal processors (DSP) of virtually all demodulator operations. Their acquisition, steady state and tracking performances are evaluated by computer simulation over an AWGN and a Rician fading channel.<>

Published in:

Communications, Speech and Vision, IEE Proceedings I  (Volume:139 ,  Issue: 3 )