Signal acquisition method and signal acquisition arrangement for spread spectrum signals

摘要

A method and arrangement are disclosed for acquiring a spread spectrum signal produced by means of transmitter-end spreading of a bit sequence using a spread code signal, which provide for the reception of the spread spectrum signal; provision of a receiver-end spread code signal which corresponds to the transmitter-end spread code signal; performance of polyphase correlations for respective different code phases which give rise to polyphase correlation results which are each associated with different code phases; filtration using at least two of the code phases; determination of an extreme value in the filtered polyphase correlation results, and determination of the code phase which is associated with the extreme value.

主权项

1. A signal processing method for the receiver-end acquisition of a transmitted spread spectrum signal that is produced by transmitter-end spreading of a bit string using a spread code signal, the method comprising:
receiving the spread spectrum signal disturbed by a disturbance signal during the transmission, providing a receiver-end spread code signal which corresponds to the transmitter-end spread code signal, performing polyphase correlations for multiple different code phases which engender polyphase correlation results which are associated with respective different code phases, wherein the output of the polyphase correlations defines (a) a signal profile including a correlation peak associated with the spread spectrum signal and (b) at least one signal profile associated with the disturbance signal, filtering the polyphase correlation results using at least two of the code phases to selectively reduce the magnitude of the at least one signal profile associated with the disturbance signal, while retaining a peak corresponding to the correlation peak associated with the spread spectrum signal, determining from the filtered polyphase correlation results an extreme value corresponding to the peak retained by the filtering process, and determining the code phase associated with the extreme value.