Detection of a digitally modulated signal using binary line enha

Details Detection of a digitally modulated signal using binary line enha Detection of a digitally modulated signal using binary line enha

1993-11-17

1995-10-03

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

382202, H04L 2706, H03D 100, G06K 946

Patent

active

054558468

ABSTRACT:
Detection of a digitally modulated radio signal whose underlying data contain repetition structures is achieved by generating a binary spectrum from the frequency domain spectral amplitudes. The binary spectrum of the signal can be rastered at the signal's framing rate or other periodicity to create a two dimensional matrix with the set periodic bits falling along column of the matrix. Application of non-linear logical filtering operations removes speckle caused by aperiodic bits while maintaining the run of aligned periodic bits along the column of the matrix. To automate the line detection process, statistical values and measured line lengths in the binary matrix are used to adjust processing parameter values.

REFERENCES:
patent: 4003024 (1977-01-01), Riganati et al.
patent: 4625330 (1986-11-01), Higgins
Torrieri, Don J. Principles of Military Communication Systems, Artech House, Inc., 1981. Chapter 4.
Gardner, William A. Statistical Spectral Analysis A Nonprobabilistic Theory, Prentice Hall, 1988. Chapter 14.

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