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Random access channel multi-path searching device and method of CDMA system

A random access channel and code division multiple access technology, which is applied in the field of random access channel multipath search devices, can solve the problems of poor multipath search stability and many false paths, and achieve the goal of improving system performance and detection probability Effect

Inactive Publication Date: 2008-03-05
ZTE CORP +1
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a device and method for multipath search of a random access channel in a code division multiple access system to realize multipath search of a random access channel in a wideband code division multiple access When the access channel is performing multipath demodulation, the multipath search stability is poor and there are many false paths

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  • Random access channel multi-path searching device and method of CDMA system
  • Random access channel multi-path searching device and method of CDMA system
  • Random access channel multi-path searching device and method of CDMA system

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Embodiment Construction

[0040] The implementation of the technical solution of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0041] The main purpose of the present invention is to realize the multipath search of the random access channel in the wideband code division multiple access system, reduce false paths, and improve the stability of the random access channel multipath search. In order to achieve the purpose of the present invention, the basic flow structure of "preamble detection + early or late tracking + DPCCH virtual path detection" is adopted in this embodiment.

[0042] As shown in FIG. 1, it is a schematic diagram of implementing multipath search at the receiving end of a random access channel in this embodiment. Referring to Figure 1, the idea of ​​this embodiment is specifically as follows:

[0043] The preamble detects several multipaths, and after performing correlated and non-correlated integrations on these mul...

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Abstract

This invention discloses a multi-path search device and a method for random accessed channels in WCDMA access system, which first of all carries out precursor test and correlated and non-correlated integral and takes multiple paths P exceeding the first threshold value as the pre-selected paths, then to plug 1 / 4 code into the front and back of each of the multi-path in equal distance to get 3p multiple paths and then compares the non-correlated accumulated value of the control part DPCCH of random accessed channel information with a set second threshold to eliminate fake paths reported by the precursor test ( multi-path smaller than the second threshold) and keep the multi-path exceeding the second threshold value then to select an information demodulation multi-path.

Description

Technical field [0001] The present invention relates to a channel access technology of a code division multiple access system in the field of wireless communication technology, in particular to a device for random access channel multipath search in a wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access) system and method. Background technique [0002] In the WCDMA system, when a UE (User Equipment) needs to perform operations such as registration, location update, and calling, a random access process will be initiated. The random access channel consists of two parts: preamble and message. [0003] The preamble consists of a signature and scrambling code. There are 16 signature sequences with a length of 16 bits. The signature sequence is repeated 256 times, and then the preamble is formed by scrambling. The preamble is 4096 chips (chips) long. [0004] The message is usually at its nearest leading τ p-n Transmit after time, the agreement 3GPP TS 2...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04J13/00H04W74/08
Inventor 梁立宏向涛徐海燕
Owner ZTE CORP
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