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Method and device for eliminating interference in signals in short distance wireless network

A short-range wireless and signal cancellation technology, applied in transmission systems, electrical components, etc., can solve the problems of increasing receiver complexity, occupying large hardware resources, and high implementation complexity, achieving good frequency estimation accuracy, reducing requirements, low-complexity effects

Inactive Publication Date: 2012-09-05
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that: the narrowband interference elimination method based on the time domain needs to use iterative calculations, so the implementation complexity is very high; the narrowband interference elimination method based on the transform domain needs to use the transformation , so it needs to occupy a lot of hardware resources, which greatly increases the complexity of the receiver
This is undoubtedly not applicable to short-range wireless network receivers whose main goals are low complexity, low power consumption and low cost

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  • Method and device for eliminating interference in signals in short distance wireless network
  • Method and device for eliminating interference in signals in short distance wireless network
  • Method and device for eliminating interference in signals in short distance wireless network

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Embodiment 1

[0086] In this embodiment, the short-distance wireless network is selected based on the IEEE 802.15.4b international standard wireless personal area network (Wireless Personal Area Network, WPAN), and the narrowband interference is selected based on the radio frequency identification of the ISO / IEC 18000-6 (Type B) standard (Radio Frequency Identification, RFID) signal.

[0087] This embodiment will illustrate how to apply the narrowband signal frequency estimation method provided by the present invention and the receiver device against narrowband interference in the short-distance wireless network in conjunction with the accompanying drawings, so that the IEEE 802.15.4b receiver receives IEEE 802.15.4b signals and RFID signals The baseband mixed signal, and effectively remove the narrowband interference of the RFID signal, and realize the correct demodulation of the IEEE 802.15.4b signal.

[0088] Might as well set the IEEE 802.15.4b signal information rate as 250kbps, and th...

Embodiment 2

[0121] It should be noted that the position of the module in the receiver structure for eliminating interference in the signal in the short-distance wireless network provided by the embodiment of the present invention is not limited to the position given in the first embodiment. For example, in this embodiment, the frequency estimation module and The non-zero-frequency interference removal module can be placed before the signal frame detection module, and the settings of other system parameters are the same as those in Embodiment 1, such as Figure 4 shown.

[0122] Figure 12 In the case that the central frequency is 250KHz RFID narrowband signal, the IEEE 802.15.4b receiver designed by the embodiment of the present invention is used to demodulate the 15.4 signal, and the frame error rate (PER) of the system varies with the signal-to-noise ratio (SNR) . It can be seen that, compared with the traditional IEEE 802.15.4b receiver, the receiver provided by the embodiment of the...

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Abstract

The embodiment of the invention discloses a method and a device for eliminating narrowband interference in signals in a short distance wireless network, which relates to the technical fields of communication and computers. The method and the device have higher compatibility on the narrowband interference with zero frequency and non-zero frequency and can obviously improve the interference resistant tolerance and demodulation properties of a system. The method for eliminating the narrowband interference in the signals in the short distance wireless network comprises the following steps: eliminating a narrowband interference signal with zero central frequency in a received baseband signal to obtain the baseband signal of the zero frequency interference of which is eliminated; estimating thecentral frequency of the narrowband interference signal in the received baseband signal so as to obtain an estimated central frequency value; and eliminating the interference signal with non-zero estimated central frequency so as to obtain a signal the interference of which is eliminated.

Description

technical field [0001] The invention relates to the technical fields of communication and computer, in particular to a method and device for eliminating interference in signals in a short-distance wireless network. Background technique [0002] The low-speed, low-cost, and low-power short-distance wireless transmission system for short-distance information transmission is one of the research hotspots in the field of wireless communication in recent years. The goal of low cost and low power consumption puts forward high requirements for the design of the receiver solution. It requires that the receiver should be as simple in structure and low in cost as possible, that is, on the premise of keeping the system performance unchanged, the cost of implementation should be reduced as much as possible. of complexity. [0003] The short-distance wireless transmission system adopts the direct sequence spread spectrum technology which is simple to implement but can greatly improve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/71
CPCH04B1/1036
Inventor 刘培张兴炜韩瑜赵玉萍
Owner HUAWEI TECH CO LTD