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Peak value searching method and device used for code division multiple access

A technology of peak search and code division multiple access, which is applied in the field of CDMA mobile communication, can solve problems such as inability to extract signals and lost paths, and achieve the effect of increasing the frequency of peak search reporting, improving peak accuracy, and achieving simple and easy results

Inactive Publication Date: 2011-06-22
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is to provide a peak search method and device for code division multiple access to solve the problem in the prior art that when the signal power is less than the noise power, the path may be lost and the correct signal cannot be extracted

Method used

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  • Peak value searching method and device used for code division multiple access
  • Peak value searching method and device used for code division multiple access
  • Peak value searching method and device used for code division multiple access

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Embodiment Construction

[0037] In order to solve the disadvantages of the traditional technical solution, the present invention further elaborates a kind of peak search method and device for code division multiple access according to the present invention through the following examples. Limitations of Invention.

[0038] The peak search method and device for code division multiple access according to the present invention filter the delay extension results on the basis of the delay extension average, greatly improve the signal-to-interference ratio of the delay extension, and filter the filtered Time delay extension for peak search, providing more accurate and fast data for multipath search, thereby significantly reducing false alarms and false negatives, even when the signal power is less than the noise power, the correct signal can be extracted, and can be Refresh the finger peaks periodically for each frame.

[0039] Such as figure 2 Shown is the structural diagram of the device described in th...

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Abstract

A peak value search device used on CDMA consists of time delay extension-acceleration module, peak value search module and time delay extension-filter module for solving problem of path possible loss in existed technique when signal power is less than noise power. The method applying said device to carry out peak value search of CDMA is also disclosed.

Description

technical field [0001] The invention relates to the field of CDMA (code division multiple access) mobile communication, in particular to a peak search method and device for code division multiple access. Background technique [0002] In existing mobile communication technologies, signals sent from base stations propagate to users along different propagation paths. Since the lengths of these propagation paths are different, the time for these signals to reach users is also different, and there is a time delay between them. Generally speaking, the chip rate of the CDMA system is very high, and the scrambling code has good autocorrelation, so it has a strong multipath resolution, can make full use of the inherent frequency diversity of the multipath channel, and improve the bit error performance of the system . [0003] The multipath search function of the CDMA receiver is to form the time delay extension by despreading the received signal, and determine the air path according...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04B7/26H04B1/7083H04B1/7075
Inventor 吴哲朱国宇
Owner SANECHIPS TECH CO LTD