Interference source identification
First Claim
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1. A receiver for receiving a desired transmitted signal, from among a plurality of transmitted signals, each of the transmitted signals comprising a data signal and a superimposed identification signal, each identification signal having a predetermined amplitude, the receiver comprising:
- means for comparing the amplitude of the identification signal of the desired transmitted signal to an amplitude of an identification signal of at least one other transmitted signal from the plurality transmitted signals; and
means for causing an alarm condition when said means for comparing indicates that said amplitude of said identification signal from said at least one other transmitted signal is greater than a predetermined fraction of said amplitude of said identification signal of said desired transmitted signal.
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Abstract
A method and apparatus for immediately identifying the presence and the source of interference in a communications system. A separate identification code is superimposed on each signal transmitted from a separate transmitter. At any receiver, if an undesired signal causes interference, it can be idenified via its associated identification code. In one embodiment, spread spectrum chip sequences are used as the identification codes.
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Citations
16 Claims
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1. A receiver for receiving a desired transmitted signal, from among a plurality of transmitted signals, each of the transmitted signals comprising a data signal and a superimposed identification signal, each identification signal having a predetermined amplitude, the receiver comprising:
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means for comparing the amplitude of the identification signal of the desired transmitted signal to an amplitude of an identification signal of at least one other transmitted signal from the plurality transmitted signals; and means for causing an alarm condition when said means for comparing indicates that said amplitude of said identification signal from said at least one other transmitted signal is greater than a predetermined fraction of said amplitude of said identification signal of said desired transmitted signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a receiver for receiving a desired transmitted signal, from among a plurality of transmitted signals, the transmitted signals comprising a data signal and a superimposed identification signal, each identification signal having a predetermined amplitude, a method of identifying interference in a transmitted signal comprising the steps of:
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comparing the amplitude of the identification signal of the desired transmitted signal to the amplitude of the identification signal of at least one other transmitted signal from the plurality of transmitted signals; outputting an alarm signal when said step of comparing indicates that said amplitude of said identification signal from said at least one other transmitted signal is greater than a predetermined fraction of said amplitude of said identification signal of said desired transmitted signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification