Process for synchronizing a receiver switching circuit to a received signal containing a pn-code-spread data signal
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United States of America Patent
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Jul 25, 1995
Grant Date -
N/A
app pub date -
Sep 13, 1993
filing date -
Sep 29, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A synchronizing circuit comprises a controllable timer (9) and a PN-code generator (10) controllable thereby with at least three outputs (11.1, 11.2, 11.3), for the production of at least three PN-code signals phase-shifted with respect to one another. The PN-code signals phase-shifted with respect to one another are correlated, in parallel correlation paths, with the received signal. Upon the presence of a time drift, the phase position of the trailing PN-code signal, for example, is changed so that this signal is now leading. Thereby, the control range is shifted. At the same time, reassignment is effected between the correlation path and the demodulating output in such a way that in all cases the correlation path that is in the middle with respect to time and that has the maximum correlation power is utilized for demodulation.
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