| Summary: | 碩士 === 國立清華大學 === 電機工程研究所 === 82 === A signal transmitted through a multipath fading channel will
be distroied by the nonideal effects of the channels. It is
difficult for the receiver to detect the received signals
correctly. In this thesis, we will introduce a
reconstructive over- sampling receiver structure consist of a
preproce- ssor, a estimator, a postprocessor and a detector. In
this reconstructive receiver structure, the pr- eprocessor will
extract the sufficient statistics of the channels and the
estimator will use these sufficient ststistics to estimate the
fading gains of the channel. The postprocessor will reconstruct
or compensate the received signal by the estimated channel
gains and the detector can detect the sig- nal infomations by
the reconstructive signals. In this receiver structure we try
to implement the o- versampling techinques in the
preprocessor. After applying oversampling on the preprocessor,
The re- ceiver will extract more sufficient statistics fr- om
the fading chennls. If the oversampling rate is fast enough
the resolution of the delay paths of the multipath fading
channel caused by multipath effect will increase. In the other
word, it is an- other wind-band technique implementation. In
this thesis, we will introduce some early works about the
receivers for multipath fading channels in ch- apter 1. In
chapter 2, we will introduce the char- acteristics of the
multipath fading channels. In chapter 3, the influences for
implementing oversa- mpling techniques in the receiver will be
discuss- ed. In chapter 4, we will design a practical over-
sampling receiver structure. We will derive a bit error
probability upper bound by doing the perfor- mance analysis of
that practical receiver. in cha- pter 5 and design a program
simulator of the prac- tical receiver and show some
simulation results. We give a conclusion about this
oversampling rece- iver in chapter 7.
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