Power adaptive channel estimation for a multi-path receiving
AssigneeMediatek Inc.
InventorsChe-Li Lin, Shun-An Yang
Life of this patent
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Abstract
A multi-path receiving system is provided. The multi-path receiving system includes a multi-path analyzer, a channel estimator and an equalizer. The multi-path analyzer analyzes a channel impulse response (CIR) of the multi-path channel from the received stream. The channel estimator calculates a channel estimation result from the received stream. The channel estimator comprises a frequency domain interpolation filter performing channel estimation. The frequency domain interpolation filter consumes an amount of power according to the CIR result output from the multi-path analyzer. The equalizer equalizes the received stream based on the channel estimation result.
Claims18
A multi-path receiving system having adaptive channel estimation for receiving a stream passing through a multi-path channel, comprising:
- a multi-path analyzer analyzing a channel impulse response (CIR) of the multi-path channel from the received stream;
- a channel estimator calculating a channel estimation result from the received stream, wherein the channel estimator comprises a frequency domain interpolation filter performing channel estimation, wherein the frequency domain interpolation filter consumes an amount of power according to the CIR result output from the multi-path analyzer;
- and
- an equalizer equalizing the received stream based on the channel estimation result.
An adaptive channel estimation method, receiving a stream passing through a multi-path channel, comprising:
- analyzing a channel impulse response of the multi-path channel from the received stream;
- calculating a channel estimation result from the received stream by a frequency domain interpolation filter, wherein the frequency domain interpolation filter consumes an amount of power according to the channel impulse response;
- and
- equalizing the received stream based on the channel estimation result.
An OFDM demodulator for demodulating a stream passing through a multi-path channel, comprising:
- an FFT module converting the stream into a plurality of pilot sub-carriers and data sub-carriers;
- a channel estimator, generating a frequency response of the multi-path channel and consuming power according to a channel impulse response;
- an IFFT module, coupled to the channel estimator, generating the channel impulse response from the frequency response;
- an equalizer equalizing the received stream according to the channel impulse response.
Dependencies are inferred from the claim text.