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Channel estimation smoothing method and device

A channel estimation and smoothing technology, applied in channel estimation, digital transmission system, baseband system components, etc., can solve problems such as poor accuracy of smoothing and filtering, and achieve the effect of improving computing efficiency

Active Publication Date: 2022-03-18
ALTO BEAM (CHINA) INC
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Problems solved by technology

[0004] In view of this, the purpose of this application is to provide a channel estimation smoothing method and device to solve the problem of poor smoothing accuracy when smoothing and filtering the channel estimation results

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  • Channel estimation smoothing method and device
  • Channel estimation smoothing method and device

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, every other embodiment obtained by those skilled in the art withou...

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Abstract

The invention provides a channel estimation smoothing method and device, and the method comprises the steps: carrying out the fast Fourier transform of a to-be-smoothed channel estimation result, and determining a time domain impulse response sequence; based on the time domain impulse response sequence, determining a plurality of candidate accumulated powers corresponding to selection windows with different selection lengths in the first range and noise powers corresponding to the second range; determining a channel length based on the plurality of candidate accumulated powers and the noise power; determining a signal-to-noise ratio by using the channel length and a target accumulated power selected from the plurality of candidate accumulated powers; and selecting a target smoothing filter coefficient corresponding to the signal-to-noise ratio and the channel length from the plurality of candidate smoothing filter coefficients, and filtering the to-be-smoothed channel estimation result by using the target smoothing filter coefficient. By adopting the channel estimation smoothing method and the channel estimation smoothing device, the problem of poor smoothing filtering accuracy when smoothing filtering is carried out on the channel estimation result is solved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular, to a channel estimation smoothing method and device. Background technique [0002] At present, in an Orthogonal Frequency Division Multiplexing (OFDM) system, the transmitter modulates the information bit sequence into Phase Shift Keying (Phase Shift Keying, PSK) symbols, or modulates into Quadrature Amplitude Modulation (Quadrature Amplitude Modulation, QAM) symbols, and perform Inverse Fast Fourier Transform (Inverse Fast Fourier Transform, IFFT) on the corresponding symbols to transform them into time-domain signals, and then transmit them through the wireless channel, and the receiver receives When the transmitter transmits the signal, the received wireless signal is usually distorted due to the influence of channel characteristics. In order to recover the bit information sent by the transmitter, the receiver must estimate and compensate for the in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03
CPCH04L25/0212H04L25/024H04L25/03006
Inventor 瞿海惠
Owner ALTO BEAM (CHINA) INC
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