Digital Correlation of Spread - Spectrum Signals Via Frequency Domain Processing.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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Background information on the theory behind processing spread-spectrum synchronization data in the frequency domain is presented. The derivation shows tha the time domain pseudo-noise sequence offset is represented in the frequency domain by frequency modulation on a known carrier wave. Following the background development is a detailed description of the analog hardware used to implement the frequency domain processing techniques. A proposed method of digitally extracting the synchronization data by Fourier transforming the analog output signal is presented. The digital processor designed and built to sample, average, and calculate a Fast Fourier Transform of the analog data is described in detail. Results obtained from both the analog and digital hardware are discussed, comparing the actual results to those predicted for various inputs. The results validate the processing concepts, and indicate areas for further research. Author
- Statistics and Probability
- Computer Hardware
- Non-Radio Communications