Interference rejection in wireless receivers
AssigneeIntel Corporation
InventorsXintian Lin, Qinghua Li, Camille Chen
Life of this patent
Estimating the term…
Abstract
The effects of interference are mitigated in a wireless system through updating noise variance estimates. Noise variance estimates may be updated after the reception of a preamble in an OFDM receiver.
Claims23
A method comprising updating a noise variance estimate during the reception of a data portion of a packet in an orthogonal frequency division multiplexing (OFDM) receiver.
A method comprising:
- receiving a signal having a preamble in an orthogonal frequency division multiplexing (OFDM) system;
- estimating a noise variance for at least one frequency sub-carrier in the OFDM system;
- receiving a signal having data in the OFDM system;
- and
- re-estimating the noise variance from the signal having data.
An article comprising a machine-readable medium adapted to hold instructions that when accessed result in a machine continuously estimating a noise variance for each tone in a received OFDM signal.
An electronic system comprising:
- a wireless personal area network (WPAN) interface;
- a wireless local area network (WLAN) interface that utilizes orthogonal frequency division multiplexing (OFDM);
- and
- a memory storage element to hold instructions that when accessed result in updating a noise variance for a received WLAN signal, wherein the noise variance describes the received WLAN signal for a time period other than a time during which a preamble is received.
Dependencies are inferred from the claim text.