| Summary: | 碩士 === 淡江大學 === 資訊工程研究所 === 81 === We apply Digital Signal Processing (DSP) techniques to the
design of Amplitude Shift Keying receivers for binary
detections . Both coherent and noncoherent detections are
considered . In addition , matched filters are used to enhance
signal-to-noise ratios ( and thus system performance ) . In
designing our digital systems , the technique of Impulse-
Invariant Transformation has been used for the digital
matched filter . We haved used MATLAB software for system
simulation . The input signal plus noise are programed
into the system . due to our PC capacity limitation , the
input signal used in simulation are restricted to weak
sinusoids in the mV range . The input noise is assumed to be
wideband Guassian generated from RAND function of MATLAB
using 8K Hz sampling frequency accounting for a 4K Hz
bandwidth . The system performance resulted from the
simulation for our digital system is then compared with
the theoretical results for analog counterparts , and
the results are consistent with good accuracy .
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