CDMA same-frequency same-code wireless full-duplex communication channel self-interference elimination method

A technology of self-interference cancellation and same frequency and same code, which is applied in the field of communication to achieve the effect of increasing the number of users and saving channel resources

Active Publication Date: 2017-11-17
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the biggest difficulty in CDMA same-frequency, same-code wireless communication is that before decoding the received signal, the receiving end needs to eliminate the self-interference to its own signal reception formed by the transmitted signal through the transmission channel.

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  • CDMA same-frequency same-code wireless full-duplex communication channel self-interference elimination method
  • CDMA same-frequency same-code wireless full-duplex communication channel self-interference elimination method
  • CDMA same-frequency same-code wireless full-duplex communication channel self-interference elimination method

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Embodiment Construction

[0043] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0044] At the same time, full-duplex communication at the same frequency can greatly increase the communication capacity. On the basis of the same frequency at the same time, there has been a situation where both the sender and the receiver use the same code word sequence for spread spectrum communication (that is, the same frequency and the same code communication), such as figure 1 Shown is a flow chart of...

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Abstract

The invention provides a CDMA same-frequency same-code wireless full-duplex communication channel self-interference elimination method, comprising a model establishment step of establishing a channel self-interference model based on interference characteristics of sending signals for receiving signals through a self-interference channel; a model estimation model of estimating a self-interference model according to test signals in the receiving signals and the sending signals; and a self-interference elimination step of eliminating the self-interference of data signals in the receiving signals according to the estimated self-interference model and the sending signals. According to the method, the CDMA same-frequency same-code wireless full-duplex communication channel self-interference can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a self-interference elimination method for a CDMA same-frequency and same-code wireless full-duplex communication channel. Background technique [0002] At the same time, the same-frequency full-duplex communication is a research hotspot in the field of communication at present, and this technology can greatly increase the communication capacity. At present, in CDMA wireless communication, the communication parties can use the same frequency for two-way communication at the same time, but need to use different code word sequences to spread the signal, so that the number and allocation of code words are greatly restricted. [0003] Using the wireless communication method of the same frequency and the same code, the communication parties can not only work at the same frequency, but also use the same code word sequence for spread spectrum communication, so half of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/14H04W24/06H04B1/525H04B1/10
Inventor 曹军威明阳阳
Owner TSINGHUA UNIV
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