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Method and device for eliminating same frequency full duplex system self-interference

A co-frequency full-duplex, self-interference technology, applied in the field of communication, can solve the problems of difficult to reconstruct the transmitted signal, the device cannot know exactly, and the practicability is poor.

Inactive Publication Date: 2017-01-04
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that it is difficult to reconstruct its own emission signal very accurately, such as figure 1 As shown, because the source of the self-interference signal includes not only the interference of the transmitted signal leaked to the receiving link through the RF front-end, but also the interference radiated into the space by the antenna and received by the device, and because the space information is beyond the control of the device, the device It is not possible to know with certainty that the above interference
Therefore, it is very poor to hope to reconstruct the transmitted signal to eliminate the interference to the reception.

Method used

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  • Method and device for eliminating same frequency full duplex system self-interference
  • Method and device for eliminating same frequency full duplex system self-interference
  • Method and device for eliminating same frequency full duplex system self-interference

Examples

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Embodiment 1

[0094] According to an aspect of the embodiments of the present invention, a method for eliminating self-interference in a same-frequency full-duplex system is provided, which is applied to the base station side. The method first establishes a link with a terminal with registration authority; then, establishes a link with the terminal with registration authority. A terminal with registration authority negotiates a dedicated uplink spreading code and a dedicated downlink spreading code; finally, uses the dedicated uplink spreading code and the dedicated downlink spreading code to perform same-frequency full-duplex communication with the terminal with registration authority .

[0095] The method for eliminating the self-interference of the same-frequency full-duplex system in the embodiment of the present invention uses different dedicated uplink spreading codes and dedicated downlink spreading codes to carry out same-frequency full-duplex communication, which can eliminate the s...

Embodiment 2

[0119] According to another aspect of the embodiments of the present invention, there is also provided a method for eliminating self-interference in the same-frequency full-duplex system, which is applied to the terminal side. The method first: establishes a link with a base station that allows the terminal to register; then, Negotiating a dedicated uplink spreading code and a dedicated downlink spreading code with the base station that allows the terminal to register; finally, using the dedicated uplink spreading code and the dedicated downlink spreading code to communicate with the base station that allows the terminal to register The base station performs same-frequency full-duplex communication.

[0120] like image 3 As shown, the method includes:

[0121] Step S31, establishing a link with a base station that allows the terminal to register.

[0122] Wherein, step S31 specifically includes:

[0123] Acquiring the system information broadcast by a base station of the s...

Embodiment 3

[0141] According to another aspect of the embodiments of the present invention, there is also provided a device for eliminating self-interference in a same-frequency full-duplex system, which is applied to a base station, such as Figure 4 As shown, the device 400 includes:

[0142] The first link module 401 is configured to establish a link with a terminal with registration authority;

[0143] The first negotiation module 403 is configured to negotiate with the terminal having the registration authority a dedicated uplink spreading code and a dedicated downlink spreading code, wherein the dedicated downlink spreading code is different from the dedicated uplink spreading code;

[0144] The first communication module 405 is configured to use the dedicated uplink spreading code and the dedicated downlink spreading code to perform same-frequency full-duplex communication with the terminal with registration authority.

[0145] Optionally, as in Figure 5 As shown, the first link...

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Abstract

The invention provides a method and device for eliminating same frequency full duplex system self-interference. The method comprises steps of establishing a link with a terminal having a registration authority, negotiating a special purpose upstream extended code and a special purpose downstream extended code with the terminal having the registration authority, wherein the special purpose downstream extended code is different from the upstream extended code; using the special purpose upstream extended code and the special purpose downstream extended code to perform same frequency full duplex communication with the terminal having the registration authority. The method of the invention adopts an interference randomized method to perform extension on a signal of an emission link, enables the in-band modulation interference of the emission link to be white-noised and eliminates the self-interference during the same frequency full duplex communication.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for eliminating self-interference in a same-frequency full-duplex system. Background technique [0002] In a wireless communication system, duplex refers to how the communication parties perform two-way information exchange, which can be divided into simplex, half-duplex and full-duplex. Simplex means that data can only be transmitted in one direction. Among the two parties in communication, one is fixed as the sender, and the other is fixed as the receiver. Information can only be transmitted in one direction, using a single transmission line. A half-duplex system allows two-way data transmission between two devices, but not simultaneously. Therefore, only one device is allowed to transmit data at the same time. If another device wants to transmit data, it needs to wait for the original device to transmit data to complete the transmission before pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7097H04W16/14H04W60/00
Inventor 邢金强马帅
Owner CHINA MOBILE COMM GRP CO LTD
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