Signal locking indicating judging method and apparatus thereof
A signal locking and determining device technology, applied in the selection device, the shaping network in the transmitter/receiver, electrical components, etc., can solve the problems of signal fluctuation, hindering wireless reception, wrong locking indication determination, etc., to improve the accuracy , The signal energy and noise energy are stable, and the effect of resisting fading
Inactive Publication Date: 2004-04-21
HUAWEI TECH CO LTD
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[0003] When the signal is in deep fading, the so-called fading means that during the transmission process of the signal, the wireless reception is hindered by the transmission channel, so that the signal has a large fluctuation phenomenon. When the signal energy is not much different from the noise threshold, there will be a wrong determination of the locking indication, which will affect the normal communication of the mobile communication system.
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[0037] The signal receiving part of the mobile communication system is composed of many receiving branches, and each branch is provided with a locking indication judging unit. The device for improving the accuracy of signal locking indication judgment in the present invention provides a new locking method. Indicates the determination unit, its application environment is as figure 2 As shown, its structural principle is as follows image 3 shown, including:
[0038] Signal energy calculation module: receive the baseband signal, calculate and determine the signal energy and then output to the comparator; the signal energy calculation module further includes:
[0039] Signal despreading module: receive the baseband signal, perform despreading processing, and then output to the signal square sum module;
[0040] Signal square sum module: receive the I and Q two-way data sent by the signal despreading module, perform square sum processing and output to the filter;
[0041] The ...
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This invention concerns a method and device for signal lock-in indication judging. The method is: make separated filtering for receiving signals energy that have calculated out and noise signal energy; then according to treated signal energy and noise energy , make received signal lock-in indication judging. Above statement device consists of: signal energy calculating module, noise signal energy calculating module, noise threshold calculating module and comparator; between the signal energy calculating module and comparator, noise signal energy calculating module and noise threshold calculating module, have set first-order HR filters. Therefore, this invention can reduce effectively errors of signal lock-in judging at deep attenuation, improve effectively accuracy of signal lock-in indication judging.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for determining a signal locking indication. Background technique [0002] In a mobile communication system, the signal receiving part needs to perform a lock indication determination on the received signal. The currently used method for judging the lock indication is to calculate the received signal energy and the noise energy respectively. The specific calculation method is as follows: figure 1 As shown, after despreading the received signal, the conjugate multiplication of the received signal and the locally generated pseudo-random signal is performed, and then the sum of squares is processed to obtain the signal energy. At the same time, the received signal is despreaded, and then The sum of squares is processed to obtain the noise signal energy, and the noise threshold value is obtained by multiplying the noise signal energy by the...
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IPC IPC(8): H04B1/707H04B1/10H04B1/16H04L25/03
Inventor 邵娟
Owner HUAWEI TECH CO LTD