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Self-interference elimination method based on power detection and loop delay calculation

A technology of self-interference cancellation and loop delay, applied in power management, network planning, digital transmission system, etc., can solve the problems of increased complexity of hardware implementation

Active Publication Date: 2013-12-18
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, because of the theory or technology used in channel estimation and digital filters, the complexity of hardware implementation increases

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  • Self-interference elimination method based on power detection and loop delay calculation
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  • Self-interference elimination method based on power detection and loop delay calculation

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Embodiment Construction

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] See figure 1 , Introduce the interference elimination method based on power detection and loop delay calculation of the present invention:

[0022] As we all know, the data signal transmitted by the wireless communication device from its digital signal processing circuit is sent through its transmitter circuit and transmitting antenna; when the data signal is received by the receiving antenna of the machine, it becomes a self-interference signal. The interference elimination method of the present invention is to eliminate the self-interference signal, and the method includes the following two operation steps:

[0023] Step 1. Measure the channel parameters of the self-interference loop: transmit a set of training sequence signals, and use a well...

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Abstract

A self-interference elimination method based on power detection and loop delay calculation includes the following steps of firstly, measuring parameters of a self-interference loop channel, namely, transmitting a set of training sequence signals, calculating the time delay produced after self-interference signals are transmitted through the loop through the public loop delay algorithm, and calculating the changes of the receiving power and the transmitting power of the self-interference signal in a digital signal processing circuit; secondly, eliminating self-interference produced in the communication process, namely, generating a set of corresponding compensation signals which conduct quantization and delay along with transmitted digital signals according to the measured parameters of the self-interference loop channel in the first step when communication and data sending start, and then enabling compensation signals to subtract the self-interference signals to eliminate the self-interference signals in the communication process when the received self-interference signals arrive at the digital signal processing circuit.

Description

Technical field [0001] The present invention relates to a digital signal processing technology of a communication system. Specifically, it relates to a self-interference elimination method based on power detection and loop delay calculation, and belongs to the technical field of wireless communication technology. Background technique [0002] In the current wireless communication system, two modes are distinguished by duplex mode: Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Among them, simultaneous co-frequency full-duplex communication is a new technology that has only been studied in recent years. . Its transmission and reception use the same frequency band, and the receiving and sending operations are performed at the same time, which can double the spectrum utilization rate with very scarce resources, so it is widely studied. [0003] The so-called simultaneous same frequency requires that the communication device is both a transmitting device and a receivi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W52/12H04W52/16H04L1/00
Inventor 高锦春任宇鑫于翠屏白逍刘元安黎淑兰苏明吴永乐
Owner BEIJING UNIV OF POSTS & TELECOMM
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