Method and arrangement for noise variance and SIR estimation
First Claim
1. A method for noise variance estimation of a detected signal, the method comprising:
- receiving a wireless signal and producing, from an input of the received wireless signal to a detector, a detected signal, wherein the detected signal is an output from the detector;
producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and
producing, from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal.
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Accused Products
Abstract
A method and arrangement for noise variance and SIR estimation in a UTRAN Node B or User Equipment estimates the SIR (SIR(l) . . . SIR(K)) at the output of a detector by using an estimate ({circumflex over (σ)}2) of the detector input noise variance to provide an estimate ({circumflex over (σ)}z2) of the detector output noise variance. The detector input noise variance is derived from a midamble portion in the received signal. By deriving the transfer function of the detector an estimate of the detector output noise variance is estimated. The estimated output noise variance then allows an improved estimate of the SIR (SIR(l) . . . SIR(K)) at the detected output.
125 Citations
32 Claims
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1. A method for noise variance estimation of a detected signal, the method comprising:
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receiving a wireless signal and producing, from an input of the received wireless signal to a detector, a detected signal, wherein the detected signal is an output from the detector; producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and producing, from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A user equipment capable of noise variance estimation of a detected signal, the user equipment comprising:
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a detector for receiving a wireless signal and outputting from an input of the received wireless signal, a detected signal; first noise variance logic for producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and second noise variance logic for producing, from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A base station capable of noise variance estimation of a detected signal, the base station comprising:
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a detector for receiving a wireless signal and outputting, from an input of the received wireless signal, a detected signal; first noise variance logic for producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and second noise variance logic for producing, from the detected signal and the first noise variance signal a second noise variance signal representative of noise variance estimation of the detector in the received signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A user equipment comprising:
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a memory; a processor coupled to the memory; and program code executable on the processor, the program code operable for; receiving a wireless signal and producing, from an input of the received wireless signal to a detector, a detected signal, wherein the detected signal is an output from the detector; producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and producing, from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal.
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26. A base station comprising:
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a memory; a processor coupled to the memory; and program code executable on the processor, the program code operable for; receiving a wireless signal and producing from an input of the received wireless signal to a detector, a detected signal, wherein the detected signal is an output from the detector; producing from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and producing from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal.
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27. A computer-readable medium encoded with executable instructions for noise variance estimation of a detected signal, the instructions comprising instructions for:
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receiving a wireless signal and producing from an input of the received wireless signal to a detector, a detected signal, wherein the detected signal is an output from the detector; producing from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and producing from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal. - View Dependent Claims (28, 29, 30)
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31. A communication system configured to provide for noise variance estimation of a detected signal, the communication system comprising:
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a detector for receiving a wireless signal and outputting from an input of the received wireless signal, a detected signal; first noise variance logic for producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and second noise variance logic for producing, from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal.
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32. An integrated circuit for receiving a signal and detecting therein a detected signal, the integrated circuit comprising:
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first noise variance logic or producing, from the received wireless signal, a first noise variance signal representative of noise variance in the received wireless signal; and second noise variance logic for producing, from the detected signal and the first noise variance signal, a second noise variance signal representative of noise variance estimation of the detector in the received signal.
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Specification