Channel and noise estimation in wireless communication
AssigneeTP-Link Systems Inc.
InventorsQiaoyang Ye, Jian Gu
Life of this patent
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Abstract
In some embodiments, an receiver in wireless communication may determine whether channel smoothing should be used in channel and noise estimation. The receiver may obtain pre-smoothing estimated noise using one or more training symbols, and obtain post-smoothing estimated noise based on the post-smoothing channel estimation. The receiver may compare the pre-smoothing estimated noise and the post-smoothing estimated noise, and based on the comparison, select the pre-smoothing channel and noise or the post-smoothing channel and noise. The receiver may be an orthogonal frequency-division multiplexing (OFDM) receiver.
Claims20
An apparatus for communication in a wireless channel, the apparatus comprising:
- a multiplexer configured to, in response to a selection signal, select estimated channels and estimated noise respectively from first estimated channels and first estimated noise or respectively from second estimated channels and second estimated noise, wherein the second estimated channels and the second estimated noise are based on the first estimated channels;
- and
- a decoder configured to decode wireless signals from the wireless channel using the selected estimated channels and the selected estimated noise.
A method for communicating in a wireless channel, the method comprising:
- in response to a selection signal, selecting estimated channels and estimated noise respectively from first estimated channels and first estimated noise or respectively from second estimated channels and second estimated noise, wherein the second estimated channels and the second estimated noise are based on the first estimated channels;
- and
- decoding wireless signals from the wireless channel using the selected estimated channels and the selected estimated noise.
A receiver in a wireless network, in which signals are encoded on multiple subcarriers each associated with a respective carrier frequency, the receiver comprising:
- an radio frequency (RF) unit configured to receive an RF signal from an over-the-air medium on the multiple subcarriers;
- an analog-to-digital (AD) converter configured to convert the received RF signal to a digital wireless frame;
- and
- a multiplexer configured to, in response to a selection signal, select estimated channels and estimated noise respectively from first estimated channels and first estimated noise or respectively from second estimated channels and second estimated noise, wherein the second estimated channels and the second estimated noise are based on the first estimated channels;
- and
- a decoder configured to decode the digital wireless frame using the selected estimated channels and the selected estimated noise.
Dependencies are inferred from the claim text.