Method and apparatus for providing signal synchronization in a s

Details Method and apparatus for providing signal synchronization in a s Method and apparatus for providing signal synchronization in a s

1991-01-31

1992-05-05

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, 375106, 375115, 375116, H04L 2730

Patent

active

051114780

ABSTRACT:
A method and apparatus is provided for synchronizing a spread spectrum communication site. The communication site receives a spread message signal from over a radio communication channel. Subsequently, the communication site synchronizes the received spread message signal with an estimate of the received spread message signal. The estimated received signal is a function of a predetermined message signal and a predetermined spreading code. The received and the estimated received spread message signals are synchronized by using a sliding correlator to incrementally increase the phase shift between the received and the estimated received spread message signal until the received and the estimated received spread message signals are synchronized. The communication site limits the increase of the phase shift between the received and the estimated received spread message signal to a predetermined maximum phase shift magnitude which is derived from known operating environment parameters of the spread spectrum communication site.

REFERENCES:
patent: 4092601 (1978-05-01), Lee et al.
patent: 4649549 (1987-03-01), Halpern et al.
Dixon, Robert C., Spread Spectrum Systems 2nd Ed., John Wiley & Sons, New York, N.Y., 1984, chapters 1, 2 and 6.

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