ISSN : 1796-2021
Volume : 3    Issue : 4    Date : September 2008

An Iterative Algorithm for Joint Symbol Timing Recovery and Equalization of Short Bursts
Pietro Savazzi, Paolo Gamba, and Lorenzo Favalli
Page(s): 34-40
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In this work a joint clock recovery (CR) and equalization scheme for short burst transmissions is
presented. The joint optimization performance may be pursued by means of both data aided and
decision directed solutions. The novel algorithm is based on an iterative scheme, exploiting a
timing error function sampled at symbol rate. The symbol timing adjustment is implemented by an
interpolation filter, built according to the Farrow structure. Equalization is obtained by baud spaced
zero forcing (ZF) and minimum mean square error (MMSE) linear filtering. Performance is evaluated
by simulating a QPSK transceiver and simulations results are compared with the ideal solutions, for
both symbol timing recovery and channel equalization, under frequency selective multipath fading
channel conditions.

Index Terms
clock recovery, expectation maximization, MMSE, ZF, digital interpolation