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Single-frequency measurements using undersampling methods

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Author
Chia, Eng S.
Date
1998-03
Advisor
Pace, Phillip E.
Second Reader
Schleher, D. Curtis
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Abstract
The objective of this study is to verify the Symmetrical Number System (SNS) undersampling receiver architecture using software and to investigate implementation issues using digital signal processing (DSP) hardware. In the software design, a MATLAB program is written to determine a single sinusoidal input frequency using this receiver architecture. Each channel of the SNS undersampling receiver consists of a low speed ADC, a discrete Fourier transform followed by a constant threshold device to detect the signal's frequency bin. The detected frequency bins are then recombined in a SNS-to-decimal algorithm to recover the frequency of the signal. Error rate performance in a Gaussian noise environment at the input stage is evaluated. In the hardware design, a sinusoidal waveform is digitized, discrete Fourier transformed and converted from the SNS format to a decimal value using a single channel digital signal processor. Implementation difficulties and design issues are discussed
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
https://hdl.handle.net/10945/8971
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  • 1. Thesis and Dissertation Collection, all items

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