H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/30, 354/67
H04B 7/26 (2006.01) H04L 7/04 (2006.01) H04L 7/08 (2006.01)
Patent
CA 2003936
Abstract Method of Determination of Signal Reception Time by means of Correlation Technique A method of determining the reception time of a signal containing a predetermined code, e.g. a Barker code. The code may be present at the start of a telegram to be received by a mobile radio from a base station. The signal is correlated with a corresponding code stored in memory. The correlation is carried out at different offsets in time. This gives a correlation curve (figure 2). The apex represents peak correlation. The timing of optimum correlation is determined by extrapolating the sides to the apex. The invention also provides a zero crossing detector for timing zero crossing events whereby sufficiently accurate timing of receipt of the code is possible to enable meaningful correlation.
Gowling Lafleur Henderson Llp
Storno A/s
LandOfFree
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