Signal, interference and noise power measurement
First Claim
1. A method of measuring signal properties, comprising the steps of:
- receiving a signal comprising a primary signal, an interference signal and noise, the primary signal including a carrier frequency and symbols;
demodulating the primary signal to remove the carrier frequency;
decoding the primary signal to obtain the symbols;
estimating a power level of the primary signal based upon the demodulated and decoded primary signal;
generating an ideal primary signal from the carrier power and frequency and the symbols;
subtracting the ideal primary signal from the received signal to produce the noise and interference signal; and
estimating the noise and interference power from the noise and interference signal.
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Accused Products
Abstract
Systems and methods are presented for measuring power levels of primary and interfering signals as well as noise, particularly for satellite transmitted signals. A typical method comprises the steps of receiving a signal comprising a primary signal, an interference signal and noise, demodulating the primary signal to remove a carrier frequency, decoding the primary signal to obtain symbols, estimating a power level of the primary signal based upon the demodulated and decoded primary signal. Additionally, an ideal primary signal can be generated from the carrier power and frequency and the symbols and subtracted from the received signal to produce the noise and interference signal. The noise and interference power is then estimated from the noise and interference signal.
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Citations
24 Claims
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1. A method of measuring signal properties, comprising the steps of:
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receiving a signal comprising a primary signal, an interference signal and noise, the primary signal including a carrier frequency and symbols;
demodulating the primary signal to remove the carrier frequency;
decoding the primary signal to obtain the symbols;
estimating a power level of the primary signal based upon the demodulated and decoded primary signal;
generating an ideal primary signal from the carrier power and frequency and the symbols;
subtracting the ideal primary signal from the received signal to produce the noise and interference signal; and
estimating the noise and interference power from the noise and interference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for measuring signal properties, comprising:
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a demodulator, receiving a signal including a primary signal, an interference signal and noise, for demodulating the primary signal to remove a carrier frequency from the primary signal;
a decoder for decoding the primary signal to obtain symbols from the primary signal;
a processor for estimating a power of the primary signal from the demodulated and decoded primary signal;
a signal generator for generating an ideal primary signal from the carrier power and frequency and the symbols;
a subtractor for subtracting the ideal primary signal from the received signal to yield the noise and interference signal; and
a processor for determining the noise and interference power from the noise and interference signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification