Spread spectrum signalling schemes

Details Spread spectrum signalling schemes Spread spectrum signalling schemes

1995-11-10

1999-04-06

Bocure, Tesfaldet

Pulse or digital communications

Repeaters

Testing

375340, H04K 100

Patent

active

058927930

ABSTRACT:
A communications system including a primary station and at least one or more secondary stations. The secondary station transmits signals as spread spectrum signals and a receiver in the primary station receives and decodes the spread signals. Frequency offsets in the received spread spectrum signals are dealt with by digitizing the received signals to produce raw data samples which are despread, frequency analyzed and the spectrums derived are scanned for peaks exceeding a predetermined threshold and the outputs indicate the presence or absence of codes.

REFERENCES:
patent: 4882579 (1989-11-01), Siwiak
patent: 5430759 (1995-07-01), Yokev et al.
"Advanced Paging Operators Code Paging Code Specification", Philips Telecom--Private Mobile Radio 1993, Issue 2.0, Jun. 1, 1995, pp. 1-27.
"The Book of The CCIR Radiopaging Code No. 1", Radiopaging Code Standards Group, pp. 38-40.
Berbard Sklar "Digital communications Fundamentals and Applications," Prentice Hall, 1988, pp. 555-570.

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