H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 13/00 (2006.01) H04B 1/707 (2006.01) H04B 7/26 (2006.01)
Patent
CA 2125831
The synchronization method consists in selecting, at a mobile station, at least one periodic pseudorandom sequence (PN) which corresponds to and is synchronized with the reference sequence transmitted by a base station on a pilot channel, and received by the mobile station over a propagation path, with this being done regardless of the frequency deviation between the transmitter and the receiver. Various possible sequences are tested by calculating the quantities E[s(t).s*(t-~)] and E[s(t).s*(t)], where E(.] designates the mean value calculated over a predetermined integration time, ~ designates a predetermined delay, and s(t) = r(t).c(t) designates the product of the received base band signal r(t) by the value (c(t)} of the tested sequence, and by calculating the ratio ¦E[s(t).s*(t-~)]¦ / E(s(t).s*(t)]. The sequence under test is selected if said ratio exceeds a predetermined threshold.
Lucas Philippe
Mege Philippe
Pineau Stephane
Eads Telecom
Goudreau Gage Dubuc
Matra Communication
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