Interference elimination method and device

A technology of interference elimination and interference data, which is applied in the field of communication, can solve the problems of frequency offset sensitivity and small carrier, and achieve the effect of low complexity and improved interference removal performance

Active Publication Date: 2016-06-22
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide an interference elimination method and device, which solve the problem of sensitivity to carrier frequency offset in traditional time domain-ba

Method used

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  • Interference elimination method and device

Examples

Experimental program
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Effect test

Example Embodiment

[0034] Example one

[0035] Figure 1B It is a schematic flowchart of an interference cancellation method provided by Embodiment 1 of the present invention. This embodiment is applicable to a communication network architecture composed of a data sending end and a data receiving end, where the data sending end can send data to the data receiving end through a transmission channel. The method provided in this embodiment may be executed by an interference cancellation device provided on the data receiving end, and the device is implemented by software and / or hardware. In the communication network architecture, the data sending end needs to use DPSK (Differential Phase Shift Keying, differential phase shift keying) or MDPSK technology to modulate the sending data, and the data receiving end can use the interference cancellation device provided in this embodiment to modulate the transmission process. The interference caused is eliminated to demodulate the data sent by the data sendin...

Example Embodiment

[0056] Example two

[0057] figure 2 It is a schematic flowchart of an interference cancellation method provided in the second embodiment of the present invention. This embodiment further optimizes operation 120 and operation 130 on the basis of the first embodiment described above. See figure 2 , The interference cancellation method provided in this embodiment specifically includes the following operations:

[0058] Operation 210: Obtain the time-domain sample sequence input this time, and perform time-frequency conversion on the time-domain sample sequence to obtain a frequency-domain sample sequence.

[0059] Operation 220: Copy the frequency domain sample sequence into two paths, which are respectively a first frequency domain sample sequence and a second frequency domain sample sequence.

[0060] Operation 230: Process the first frequency-domain sample sequence to obtain a third frequency-domain sample sequence, so that the third frequency-domain sample sequence meets the cond...

Example Embodiment

[0069] Example three

[0070] image 3 It is a schematic flowchart of an interference cancellation method provided in Embodiment 3 of the present invention. In this embodiment, on the basis of the first and second embodiments described above, an operation of pre-determining filter coefficients is added. See image 3 , The interference cancellation method provided in this embodiment specifically includes the following operations:

[0071] Operation 310: Set the initial value of each filter coefficient in the filter.

[0072] Operation 320: Obtain the time domain sample sequence corresponding to the preset training symbol obtained by the data receiving end in the training phase as the time domain sample sequence input this time.

[0073] In this embodiment, the initial value of each filter coefficient in the filter can be set to 0 or set randomly. The data sending end sends modulated signals corresponding to multiple training symbols in turn, and the data receiving end receives each m...

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Abstract

An embodiment of the invention discloses an interference elimination method and an interference elimination device. The interference elimination method comprises the steps of: acquiring a time domain sample sequence input at this time, and subjecting the time domain sample sequence to time-frequency transformation to obtain a frequency domain sample sequence; carrying out interference estimation according to the frequency domain sample sequence and a preset filter to obtain frequency domain interference data; and performing interference elimination on the frequency domain sample sequence according to the frequency domain interference data. According to the interference elimination method and the interference elimination device, the time domain sample sequence is converted into the frequency domain sample sequence, thus interference in the frequency domain sample sequence is eliminated from the aspect of frequency domain, thereby the interference removing performance of a receiving end can be improved, and the receiving end can demodulate data transmitted by a transmitting end accurately.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an interference elimination technology method and device. Background technique [0002] At present, in the communication system, the shaping filter at the transmitting end, the transmission channel, and the matched filter at the receiving end usually cause interference to the transmitted signal. For this reason, the receiving end needs to filter out the interference when demodulating the modulated signal of the sending end. As the transmitting end increases the modulation order of the baseband signal, its interference will become more and more obvious. [0003] The demodulation technology of the communication system is generally divided into coherent demodulation and non-coherent demodulation. Coherent demodulation usually requires the receiver to recover the carrier frequency and carrier phase first, and then use channel estimation technology and equalization te...

Claims

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Application Information

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IPC IPC(8): H04L25/03
Inventor 宋挥师
Owner LEADCORE TECH
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