| Summary: | 碩士 === 國立交通大學 === 電子工程學系 === 85 === In this thesis, three major tasts in the digital receiver of
the IS-54specifications for the North American Digital Cellular
(NADC) mobile phonesystem are investigated: 1) implement error
control conding; 2) support callprocessing; and 3) act as the
bridge of other modules in the baseband system. In implement
error control coding, an {\em area-efficient} BCH decoder,
interleaver and majority voting are presented. We also present
anarea-efficient Viterbi decoder. The modified bi-directional
zero-tailViterbi algorithm and the bi-directional tail-biting
Viterbi algorithmare proposed to decoding the convolutional
codings in IS-54 system.Comparing with the unidirectional
Viterbi decoding, our Viterbiimplementation can apply for
unidirectional (2, 1, 5) truncation, zero-tail(2, 1, 5) and
tail-biting (4, 1, 5) by only to modified the branch-
matricgenerator and the control sequence. Support call
processing, we implement the analog control channel (FOCC,RECC)
and the associated control channel in digital traffic channel
(SACCH,FACCH) for call processing. Act as the bridge of other
module, We implement the interface betweenequalizer, RF, speech
coder and call processing --- ISA for the IS-54mobile system.
For test our implementation in the signal processing and coding
for control and traffic channel in IS-54 mobile phone, we use
the FPGA toverify the area-efficient BCH decoder, Viterbi
decoder, the interface withother modules, the whole analog
control channel and part of digital trafficchannel.
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