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Multipath management method for multipath search

A multi-path management and multi-path search technology, applied in the field of mobile communication, can solve problems such as unsatisfactory receiver performance and search window adjustment fluctuation, and achieve the effect of ensuring performance and reducing adjustment fluctuation.

Inactive Publication Date: 2008-01-02
SANECHIPS TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is "in the prior art, when calculating the position of the search window, only the effective path information is used for judgment, which may easily cause large fluctuations in the adjustment of the search window, thereby making the receiver performance unsatisfactory". Propose a New Multipath Management Method

Method used

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Embodiment Construction

[0042] The specific embodiment of the method of the present invention is described in detail below in conjunction with accompanying drawing:

[0043] The present invention mainly comprises following operating steps (as shown in Figure 2):

[0044] 201. Calculate the first threshold value Thsd for judging the effective path First , the specific operation of calculating the first threshold value is:

[0045] Using formula E mean =(E 0 +......+E M-1 ) / M to calculate and report the energy E 0 ,E 1 ,...,E M-1 the mean value of

[0046] Using formula E var =(|E 0 -E mean |+...+|E M-1 -E mean |) / M Calculate and report energy variance;

[0047] Find the maximum value E of the reported energy max ;

[0048] Using the formula Thsd Max =E max -1 to calculate the maximum threshold Thsd Max ;

[0049] Using the formula Thsd 0 =E mean +E var ×Factor 0 (Factor 0 >1, the specific value is obtained by simulation according to system performance requirements) calculation ...

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Abstract

The invention discloses a multi-path management method used in multi-path search, comprising that calculating a first threshold value, selecting a effective path according to the first threshold value, calculating a second threshold value, according to the second threshold value, selecting a standby path, calculating the energy matrix gravity center of a search window, using the center to judge if the search window needs adjustment, sending the effective path to a reek receiver to process multi-path demodulation, distributing the calculated search window position adjusting information to a search module to refresh search parameters. The invention manages the multi-path threshold value for calculating search window position and for reek demodulation respectively, while the one for calculating the search window position is lower than the other one. When one effective path disappears, and the standby paths are more than the effective paths, the gravity center of the search window will not change much, and the adjustment fluctuation of the search window can be reduced to confirm the property of receiver.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to the realization of multipath search in wideband code division multiple access. Background technique [0002] In the modern mobile communication technology, wideband code division multiple access technology is more and more widely used. For the base station (NodeB), the performance of multipath search often affects the overall performance of the receiver. In multipath search, multipath management is an important link that affects its performance. In actual communication, the channel environment is constantly changing. Therefore, the energy and delay characteristics of multipath are also constantly changing. In addition, due to the influence of noise, the multipath found often contains a large number of noise paths. How to effectively The primary task of multipath management is to track the delay characteristics of multipath and effectively identify the true path and remove the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B7/005
CPCY02D30/70
Inventor 赵善红刘新阳
Owner SANECHIPS TECH CO LTD
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