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Frequency bias estimation equipment, method and communication device

A technology of frequency offset estimation and equipment, applied to multi-frequency code systems, shaping networks in transmitters/receivers, electrical components, etc., can solve problems such as high complexity, performance degradation, and large computational complexity, and achieve complex The effects of low accuracy, improved robustness, and high accuracy of frequency offset estimation

Inactive Publication Date: 2010-01-20
MARVELL TECH SHANGHAI
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  • Abstract
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  • Claims
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Problems solved by technology

The principle of the Kay method is simple, but the performance drops significantly when the signal-to-noise ratio is low
The L&R method has high accuracy at low SNR, but the computational complexity is very large
FFT method to achieve higher precision, the complexity is very high

Method used

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  • Frequency bias estimation equipment, method and communication device
  • Frequency bias estimation equipment, method and communication device
  • Frequency bias estimation equipment, method and communication device

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Embodiment Construction

[0020] Features and exemplary embodiments of various aspects of the invention will be described in detail below. The following description covers numerous specific details in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a clearer understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm presented below, but covers any modification, replacement and improvement of related elements, components and algorithms without departing from the spirit of the present invention.

[0021] In order to facilitate the understanding of the following content, here is a brief introduction to the principle of automatic frequency correction (AFC, also commonly re...

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Abstract

The invention discloses frequency bias estimation equipment, a method and a communication device. The frequency bias estimation equipment includes a path selection module, a pre-processing module, a zero filling module, a spectrum analysis module and an interpolation module. The path selection module is used for executing channel estimation to the input signal in order to selection a plurality of paths. The pre-processing module is used for multiplying a combination signal with complex conjugate of the input signal, wherein the combination signal is obtained by rake combining the channel estimation of the selected path with input signal execution class. The zero filling module is used for filling zero on the tail of the pre-processing signal. The spectrum analysis module is used for performing spectrum analysis to the zero filled signal in order to search a plurality of peaks. The interpolation module is used for estimating frequency bias between the sending part and the receiving part by interpolation with the plurality of peaks.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more specifically, to a frequency offset estimation device, method and communication device in wireless communication. Background technique [0002] In a wireless communication system, the information interaction between the sender and receiver is realized through the data transmission of the space channel. On the sending side, the transmitter modulates the user signal to be sent onto a radio frequency (RF) carrier of a certain channel to generate a radio frequency signal, and then transmits it to the wireless space through the antenna. On the receiving side, the receiver receives the RF signal from the radio space and uses a local oscillator signal to recover the desired user signal. During the signal receiving process, the frequency of the local oscillator signal of the receiver determines the received channel, and only when the frequency of the local oscillator signal matches...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04L25/02H04L25/03H04L27/26
Inventor 姚天翔刘石陈晓春李茜
Owner MARVELL TECH SHANGHAI
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