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US 9,071,480 B2Granted
Unified interference power estimation
AssigneeBroadcom Corporation
InventorsHou-Shin Chen, Fu-Hsuan Chiu
Life of this patent
Estimating the term…
Abstract
A communication device, such as a smart phone, includes logic to determine a noise power estimate. In an example, a frequency domain calculation may be used to determine noise components within the noise power estimate. Further, a product of a channel estimate and equalizer effect may be used in the determination of the levels noise components, such as, inter-symbol interference power and neighbor cell interference power.
Claims20
A method, comprising;
- at processing circuitry in a communication device:
- determining a noise power estimate comprising multiple different noise components;
- determining an inter-symbol interference power estimate based on a product of an estimated channel and an equalizer effect, the inter-symbol interference power estimate associated with a resolution of multiple samples per symbol sent by a first device via a physical channel;
- and
- removing the inter-symbol interference power estimate from the noise power estimate.
2 more elements
A system, comprising:
- channel estimator circuitry configured to:
- determine a noise power estimate comprising multiple different noise components;
- and
- determine an estimated channel for a physical channel associated with the noise power;
- equalizer circuitry configured to invert the estimated channel configured to obtain an equalizer effect;
- and
- processing circuitry in data communication with the channel estimator circuitry and the equalizer circuitry, the processing circuitry configured to:
- determine an inter-symbol interference power estimate based on a product of the estimated channel and the equalizer effect, the inter-symbol interference power estimate being associated with a resolution of multiple symbols sent by a first device via the physical channel;
- and
- remove the inter-symbol interference power estimate from the noise power estimate.
7 more elements
A device, comprising:
- a receiver configured to receive an input signal;
- decoder circuitry configured to decode a portion of a known symbol sequence from within the input signal;
- channel estimator circuitry configured to determine an estimated channel and noise power estimate based on the portion of the known symbol sequence;
- frequency domain equalizer (FDEQ), circuitry configured to invert the estimated channel to obtain a FDEQ effect;
- a power sensor configured to determine a power output of the FDEQ;
- and
- processing circuitry configured to:
- determine a first ratio of signal power to inter-symbol interference based on a frequency domain product of the estimated channel and the FDEQ effect;
- determine a second ratio of signal power to neighbor cell interference based on the frequency domain product of the estimated channel and the FDEQ effect;
- determine an inter-symbol interference power estimate based on the first ratio and a difference of the power output of the FDEQ and the noise power estimate;
- determine an estimate of a neighbor cell interference power estimate based on the second ratio and the difference;
- and
- remove the inter-symbol interference power estimate and the estimate of the neighbor cell interference power estimate from the of the noise power estimate to obtain a corrected noise power.
10 more elements
Dependencies are inferred from the claim text.