Pseudorandom Noise Code Acquisition in Direct Sequence Spread Spectrum Systems
First Claim
Patent Images
1. An initial code acquisition method for receiving spread spectrum signals, the method comprising:
- de-spreading the received signals, based on code phase synchronization, to produce a de-spread signal; and
performing a modulation detection based on a change of time-domain characteristic of the de-spread signal.
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Abstract
A method for receiving spread spectrum signals and for initial code acquisition from the received signals comprises de-spreading the received signals, based on code phase synchronization, to produce a de-spread signal; and performing a modulation detection based on a change of time-domain characteristic of the de-spread signal.
16 Citations
26 Claims
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1. An initial code acquisition method for receiving spread spectrum signals, the method comprising:
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de-spreading the received signals, based on code phase synchronization, to produce a de-spread signal; and performing a modulation detection based on a change of time-domain characteristic of the de-spread signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 26)
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13. An initial code acquisition system for receiving spread spectrum signals, the system comprising:
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de-spreading circuitry for de-spreading the received signals, based on code phase synchronization, to produce a de-spread signal; and a modulation detector for performing a modulation detection based on a change of time-domain characteristic of the de-spread signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification