Dynamic multi-path detecting method and device in code division multiple access communication system

A communication system and code division multiple access technology, applied in the field of multipath detection, can solve problems such as multipath cannot be allocated in time, system performance deteriorates, and system resources are consumed, achieving good practicability, small amount of calculation, and improved The effect on overall performance

Inactive Publication Date: 2007-08-22
互芯集成电路(北京)有限公司
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Problems solved by technology

Once a false alarm occurs, it will have a great impact on the performance of the entire system: on the one hand, after the wrong multipath is allocated to the finger of the RAKE receiver, it will cause the finger to do a lot of useless work and consume a lot of system in vain resources; on the other hand, due to the wrong multipath occupying the corresponding finger, the correct multipath cannot be allocated in time. At this time, the SNR of the combined signal will drop sharply, which will deteriorate the system performance.

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  • Dynamic multi-path detecting method and device in code division multiple access communication system
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  • Dynamic multi-path detecting method and device in code division multiple access communication system

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Embodiment Construction

[0051] The core idea of ​​the present invention is: for the multipath position information output through multipath detection, further determine whether the channel changes by comparing whether the multipath detection results in adjacent frames are the same; After multipath verification and adjacent multipath processing are performed on the multipath position output by the multipath detection, it is output as the multipath position output by the multipath detection to complete subsequent processing.

[0052] Dynamic multipath detection method of the present invention as shown in Figure 2, comprises the following steps:

[0053] Steps 201-202: Perform dynamic multipath differential detection on the multipath position obtained through multipath detection, compare the multipath position information in two adjacent frames, and judge whether the multipath position information has changed, and if so, output the multipath All the multipath positions detected by the difference are use...

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Abstract

A dynamic multi-path detecting method in CDMA communication system includes carrying out multi-path differential detection and judging whether multi-path position information in adjacent frame is changed or not and outputting all multi-path positions being differential-detected if it is or otherwise using said multi-path positions as final multi-path detection result, making multi-path verification on each output multi-path position and using multi-path position being adjacent-multi-path treated as final multi-path detection result. The multi-path searcher is also disclosed.

Description

technical field [0001] The invention relates to multipath detection technology, in particular to a dynamic multipath detection method in a code division multiple access (CDMA) communication system and a multipath searcher. Background technique [0002] CDMA technology has the advantages of large capacity, multi-user, soft capacity, and suppression of system in-band noise. Compared with traditional frequency division multiple access (FDMA) and time division multiple access (TDMA) technologies, CDMA technology has obvious advantages. Because of this, the third generation (3G) mobile communication system based on CDMA technology has become the mainstream wireless mobile communication commercial system that is vigorously promoted at present. [0003] In a wireless communication system using code division multiple access, when wireless signals propagate in the air, on the one hand, they are affected by obstacles, ionosphere, etc., blocking, refraction, reflection and scattering; ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04J13/00
CPCH04B1/7115H04B1/7117
Inventor 黎超李继扬徐朝伦
Owner 互芯集成电路(北京)有限公司
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