文档介绍：Implementation of Synchronization Algorithms,
Carrier Phase Recovery and Symbol Timing
Recovery, on a Digital Signal Processor
M. Benssalah and M. Djeddou
Communications Systems Laboratory, Military Polytechnic School, Algiers, Algeria
Email : bensmusta@
Email : @
Abstract— In this paper, an implementation of synchronization II. DATA MODEL
algorithms in munication systems such as carrier
For a linearly modulated sequence of symbols dn,the
phase recovery and symbol timing recovery is presented. For this
implementation, we use the development kit TMS320C6711 DSK transmitted signal can be expressed as :
with a rapid prototype method. The implemented algorithms are n=+∞
j2πfct
founded on estimators and detectors derived from the maximum s(t)=(e dnge(t − nT )) (1)
likelihood (ML) approach. Feedback and Feedforward structures n=−∞
are considered. These algorithms operate in Non-Data-Aided
(NDA) mode or Decision Directed (DD) mode. For the problem where T is period duration, ge(t) is a square-root raised-cosine
of symbol timing recovery synchronization, we used the Gardner, (SRRC) pulse and fc is the carrier frequency.
&
Early Late Gate and Mueller Muller algorithms. The obtained The baseband equivalent representation of the received
implementation results are very promising.
signal after, the matched filter q(−t), can be w