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Transform Domain Processing for Digital Communication Systems Using Surface Acoustic Wave Devices
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF ELECTRICAL COMPUTER AND SYSTEMS ENGINEERING
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The use of surface acoustic wave SAW devices in communication systems has recently been receiving a reasonable amount of attention. This is because SAW devices can be used to perform accurate real-time revolutions of broadband waveforms, thus enabling them to function efficiently as matched filters, Fourier transformers, etc. In particular, they appear to have a tremendous potential in spread spectrum systems. In the past, these devices have been shown to be capable of narrowband interference removal by Fourier transforming the received signal, passing the resulting waveform through either a notch-filter or a hard limiter, and then inverse transforming the latter signal. In this paper, a variety of extensions of previous results will be demonstrated. One of the key limitations of processing signals in the Fourier transform domain with SAW devices is the fact that only finite segments in time of the input waveform can be transformed by the device. It will be shown that by separating the data into two parallel bit streams, this p - trn.
APPROVED FOR PUBLIC RELEASE