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Multipath search method and apparatus, signal reception processing method and Rake receiver

A technology of multi-path search and search unit, which is applied in the field of communication, can solve the problems of high complexity and achieve the effect of overcoming the influence of the accuracy of path information

Active Publication Date: 2012-06-27
XFUSION DIGITAL TECH CO LTD
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Problems solved by technology

The inventors of the present invention found in the process of research and practice of the prior art that although the fast judgment can make the obtained path information better track the actual path change to a certain extent, the complexity is obviously high

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  • Multipath search method and apparatus, signal reception processing method and Rake receiver
  • Multipath search method and apparatus, signal reception processing method and Rake receiver
  • Multipath search method and apparatus, signal reception processing method and Rake receiver

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Embodiment Construction

[0021] An embodiment of the present invention provides a multipath search method, which supplements and expands the determined path information according to the offset. The embodiment of the present invention also provides a corresponding WCDMA signal receiving and processing method, a multipath search device and a RAKE receiver. Each will be described in detail below.

[0022] refer to figure 2 , the multipath search method of the embodiment of the present invention mainly includes steps:

[0023] A1. Obtain one or more path positions determined by path position judgment based on the path delay spectrum.

[0024] Various existing multipath search algorithms may be used in the path position determination process, such as linear search method, unit jump search method, half-way search method, bit flip search method, etc., which are not limited in this embodiment.

[0025] A2. Perform forward and / or backward offsets on at least one determined radial position according to the ...

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Abstract

The invention discloses a multipath searching method, as well as a receiving and processing method, a multipath searching device and a RAKE receiver for corresponding WCDMA signal, which is characterized in that the obtained path information from judgment is replenished and extended depending on the offset, and the drift of the path position is estimated and predicted by the extended additional path position. The drifting position is efficiently defined in the extended range to eliminate such as influence that the accuracy of the path information is affected by the peak value drift due to theexisting fat path; the judged result of path searching is processed to extend. The invention has the advantages of no need for increasing the judge frequency, maintained low complexity of searching, and useful increase for the demodulation performance of receiving end.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multipath search method, a corresponding wideband code division multiple access signal receiving and processing method, a multipath search device and a rake receiver. Background technique [0002] In wireless communication, the propagation phenomenon that a wireless signal travels from a transmitting antenna to a receiving antenna through multiple paths is called multipath. Since each path often has different time delay and fading, the time dispersion effect caused by multipath will cause interference at the receiving end. In the traditional receiving method, the multipath effect is usually treated as a kind of harmful interference, and should be eliminated and avoided as much as possible. However, under certain conditions, multipath effects can also be used to enhance the received signal. When the signal delay of different paths exceeds the delay of one chip (chip), t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7115H04B1/7113
Inventor 赵悦莹
Owner XFUSION DIGITAL TECH CO LTD
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