By Topic

Clock synchronous multicarrier demodulator for multi-frequency TDMA communications satellites

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
$33 $13
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)
F. Ananasso ; Dept. of Electron. Eng., Roma Univ., Italy ; G. Pennoni

Some design and implementation aspects of an eight-channel 2.048-Mb/s multicarrier demodulator for multifrequency TDMA (time division multiple access) systems, requiring assured network synchronization and the likely absence of preambles in data bursts, are reported. The 32 voice channels in a 2-Mb/s primary group are assigned an equal number of time slots in the frame; timing (symbol) synchronization permits each slot to be occupied by different users from frame to frame if needed by the overall network efficiency. The study phase started with the requirement of a fully digital demodulator, substantially exploiting multistage and block approaches for the demultiplexer. The latter approach was selected for detailed design and implementation, utilizing a bank of polyphase filters followed by an eight-point fast Fourier transform. Carrier recovery-not trivial because of the absence of preambles-can be implemented by either exploiting the inherent frame-to-frame coherence in a PLL (phase locked loop)-based scheme or a nonlinear phase estimation algorithm originally proposed by Viterbi

Published in:

Communications, 1990. ICC '90, Including Supercomm Technical Sessions. SUPERCOMM/ICC '90. Conference Record., IEEE International Conference on

Date of Conference:

16-19 Apr 1990