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A Frequency Offset Estimation Method for Signals

A frequency offset estimation and signal technology, applied in the field of signal processing, can solve the problem of reducing the estimation accuracy of data pair, and achieve the effect of good frequency offset estimation effect, wide applicability, and high estimation accuracy.

Active Publication Date: 2021-10-15
北京中科晶上科技股份有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing frequency offset estimation techniques only have good performance in the environment of high SNR and long pilot sequence, and are less effective in the case of low SNR and small amount of data assistance. The large noise and the serious shortage of data pairs (two data selected from the pilot sequence as a set of data pairs) lead to a large decrease in the estimation accuracy of the frequency offset estimation algorithm based on data-aided (DA)
It can be seen that the existing frequency offset estimation technology still has limitations

Method used

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  • A Frequency Offset Estimation Method for Signals
  • A Frequency Offset Estimation Method for Signals
  • A Frequency Offset Estimation Method for Signals

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] figure 1 It shows the complete communication process from the communication sender to the receiver. refer to figure 1 First, the sending module of the transmitter converts the information to be transmitted into a baseband signal in an appropriate form for wireless transmission through modulation and pulse shaping. The baseband signal is multiplied by the carrier signal in the frequency domain to transmit at a relatively high carrier frequency, and the transmitted signal is transmitted to the base station corresponding to the receiver through the communication channel of the base station and sent to the receiver . It can be understood that the channel of wireless communication will have a certain impact on the transmitted signal. Due to the influence of noise in the environment, interference from other signals, and reflection of the ...

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Abstract

The present invention provides a method for estimating the frequency offset of a signal, comprising: 1) extracting a pilot sequence from the information sequence of the signal; 2) selecting two different data from the pilot sequence to be matched as a data pair, and a total of Select m data pairs, m is a positive integer greater than or equal to 1, and 3) calculate the frequency offset of the signal according to the relationship between the two data in the data pair.

Description

technical field [0001] The invention relates to signal processing, in particular to frequency offset estimation of signals in wireless communication. Background technique [0002] In a wireless communication system, due to the relative motion between the transmitter and the receiver, the radio waves with frequency changes are received at the receiver due to the influence of the Doppler effect. Moreover, in the process of wireless communication, there is often a phenomenon that the frequency of the actual received signal deviates from the standard frequency due to the fact that the local oscillation signal of the receiver and the transmitter has different sources, or is affected by the use environment. Combining the above factors, it is difficult to correctly demodulate the signal received by the receiver, and even communication interruption may occur in severe cases. [0003] This phenomenon is especially obvious when dealing with burst signals. This is because burst signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L27/26
Inventor 刘垚圻崔加帅姚彦斌苏泳涛石晶林莫志锋杨喜宁曹欢尹楚君
Owner 北京中科晶上科技股份有限公司