Accession Number : ADA020061

Title :   Detectability of a Single Sideband Spread Spectrum Radio Signal.

Descriptive Note : Rept. for 1 Jan-3 Dec 75,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Pettus,Richard A.

Report Date : DEC 1975

Pagination or Media Count : 71

Abstract : A frequent requirement of spread spectrum communications is that the transmitted signal not be easily detected by an uncooperative receiver. If, however, single sideband amplitude modulation by a digital signal is used to achieve spectrum spreading, it is shown that peaks occur in the transmitted waveform. These peaks may be detected with a threshold receiver. The peak level dependence on bandwidth of the transmitted signal is presented. The effect of bandwidth and gaussian noise on probability of detection are considered in a statistical analysis using numerical methods. The analysis demonstrates the susceptibility of the waveform peaks to detection for a variety of bandwidths and noise levels. Results are presented in both graphical and tabular form. (Author)

Descriptors :   *Single sideband communications, *Radio interception, *Radio receivers, *Spread spectrum, Amplitude modulation, Digital systems, Radio reception, Bandwidth, Gaussian noise, Threshold effects, Statistical analysis, Numerical analysis, Information theory, Gain, Signal processing, Theses

Subject Categories : Cybernetics
      Countermeasures
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE