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Signal perception method and device

A technology for sensing devices and signals, applied in multi-frequency code systems, transmission control/equalization, etc., can solve problems such as short-term interruption of communication, and achieve the effect of avoiding interruption and simplifying the processing process.

Inactive Publication Date: 2008-12-10
HUAWEI TECH CO LTD +1
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The existence of the silent period will lead to a brief interruption of communication, which will have a greater negative impact on communication services such as voice that require high real-time performance

Method used

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  • Signal perception method and device
  • Signal perception method and device

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Embodiment Construction

[0038] The embodiment of the present invention aims at the deficiencies of the in-band sensing method in the existing cognitive radio technology, and proposes an in-band sensing implementation scheme based on pilot signals without silent periods, so that continuous overhead-free in-band sensing can be realized. Internal user detection.

[0039] That is, at the signal sending end, a group of signals with complementary characteristics between adjacent symbol pairs is determined, and the group of signals with complementary characteristics between adjacent symbol pairs is sent, so that at the signal receiving end, based on the The signals of complementary features between adjacent symbol pairs are judged to identify whether there is an authorized user in a working state in the channel.

[0040] Specifically speaking, in the embodiment of the present invention, the radio user transmitter transmits a signal having complementary characteristics of adjacent symbol pairs, that is, the ...

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Abstract

Disclosed is a signal perception method and a device, comprising first measuring the energy of the received signal, wherein the adjacent symbol pair of the signal is complementary; then determining the authorization user when the channel is in the working state if the energy of the received signal exceeds the scheduled threshold value, else showing that no authorization user is present in the working state. Due to no corresponding silence period in the implementing process in the embodiment of the invention, the interruption of the communication operation can be avoided, meanwhile, no channelestimation is performed in advance, thereby effectively simplifying the processing procedure of the perception authorization user.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a signal sensing method and device. Background technique [0002] Cognitive radio technology realizes the dynamic reuse of frequency bands that have been fixedly allocated to licensed users and other idle frequency bands through the perception of the wireless environment. In a network composed of cognitive radio systems, the sensing operation of the environment can be completed by independent sensing devices in the network or by user nodes in the network. The sensing of wireless channels can be divided into out-of-band sensing and in-band sensing. Among them, the purpose of in-band sensing is mainly to realize the sensing of the wireless channel in the current working frequency band, so as to realize the detection of authorized users in the currently occupied channel, and avoid harmful interference with authorized users in the channel. [0003] At present...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04L27/26
Inventor 陈东李维英梁毅庞继勇刘劲楠冯淑兰
Owner HUAWEI TECH CO LTD
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