Accession Number : ADA130013

Title :   Group Complementary Codes With Optimized Aperiodic Correlation.

Descriptive Note : Technical rept.,


Personal Author(s) : Holiday,E M ; Weathers,G W

PDF Url : ADA130013

Report Date : Apr 1983

Pagination or Media Count : 30

Abstract : This document describes the structure and properties of an innovative new waveform design for pulse compression processing in target sensor systems. The waveform design, which is called group complementary codes, provides sets of binary word groups which have the combined properties of optimized aperiodic autocorrelation and optimized cross correlation between word sets. The optimized aperiodic autocorrelation property allows the implementation of pulse compression processing in sensor systems to achieve zero value temporal or range sidelobes within the principal interpulse period without resorting to weighting techniques for sidelobe reduction. Weighting techniques for sidelobe reduction in a pulse compression system result in a broadened mainlobe and mismatch loss. These undesirable properties can be avoided through the utilization of group complementary codes. The orthogonal nature of group complementary codes, apparent from their absence of cross correlation between sets, implies that sensors using these code sets may be deployed in close proximity, using the same carrier frequency without direct path mutual interference when synchronized. Indirect path interference is minimized even when transmissions are not synchronized. (Author)

Descriptors :   *Coding, *Signal processing, *Mathematical analysis, *Pulse compression, Autocorrelation, Cross correlation, Waveforms, Sidelobes, Reduction, Range(Distance), High power, Target detection, Matched filters, Signal to noise ratio, Functions(Mathematics), Networks, Matrices(Mathematics), Diagrams, Gates(Circuits), Correlation techniques, Orthogonality, Vector analysis, Transformations(Mathematics), Interference

Subject Categories : Statistics and Probability
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE