Method for detecting the code-phase coincidence in an SSMA receiver
First Claim
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1. A method for detecting the coincidence between the phase position of the code of an SSMA signal which is received with a heterodyne receiver and code which produced in the receiver through an evaluation of the signal power increase in an intermediate frequency position when correct phase position occurs, comprising the steps of:
- receiving from a broader intermediate frequency signal at a desired frequency a signal portion with a band width of about twice the value of the base band information band width,receiving at least one signal portion which is outside the desired frequency range and of the same band width from a broader intermediate frequency signal, andcomparing the power of these two signal portions to determine the correct phase position.
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Abstract
A method for detecting the coincidence between the phase position of a code of an SSMA signal which has been received with a heterodyne receiver and the code which is produced in the receiver through means for evaluating the signal power increase in an intermediate frequency position when the correct phase position occurs.
32 Citations
11 Claims
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1. A method for detecting the coincidence between the phase position of the code of an SSMA signal which is received with a heterodyne receiver and code which produced in the receiver through an evaluation of the signal power increase in an intermediate frequency position when correct phase position occurs, comprising the steps of:
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receiving from a broader intermediate frequency signal at a desired frequency a signal portion with a band width of about twice the value of the base band information band width, receiving at least one signal portion which is outside the desired frequency range and of the same band width from a broader intermediate frequency signal, and comparing the power of these two signal portions to determine the correct phase position. - View Dependent Claims (2)
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3. Apparatus for detecting the coincidence between the phase position of a code of an SSMA signal which is received with a heterodyne receiver and a code which is produced in the receiver through an evaluation of the signal power increase in an intermediate frequency position when the correct phase position occurs, comprising:
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means for receiving from the intermediate frequency signal at a desired frequency a first signal portion transmitted as information with a band width of about the value of the double bit rate of the base band, means for receiving from the intermediate frequency signal at least one second signal portion of the same band width outside of the desired frequency, and means for comparing the power of said two signals to determine the phase relationship of the codes. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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Specification