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A method and apparatus for increasing synchronous detection precision

A technology for synchronous detection and precision, applied in communication between multiple stations, code division multiplexing system, electrical components, etc.

Active Publication Date: 2005-03-16
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0014] The purpose of the present invention is to provide a method and device for improving the accuracy of synchronous detection in order to overcome the shortcomings of single sampling in the random access process of a synchronous CDMA communication system in order to solve the problems in the prior art. Due to the existing problem of synchronization detection accuracy, using the uplink synchronization (SYNC_UL) code in the uplink pilot time slot (UpPTS), a method and device for improving synchronization detection accuracy based on multiple sampling are given, thereby improving the synchronization detection accuracy. performance

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  • A method and apparatus for increasing synchronous detection precision
  • A method and apparatus for increasing synchronous detection precision
  • A method and apparatus for increasing synchronous detection precision

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Embodiment Construction

[0059] Below in conjunction with accompanying drawing, the implementation of technical scheme is described in further detail:

[0060] The device for improving synchronous detection accuracy described in the present invention is made up of the following several parts:

[0061] A. Signal receiving device (101)

[0062] B. Matched filter (102)

[0063] C. Local uplink synchronization (SYNC_UL) code generating device (103)

[0064] D. Signature recognition device (104)

[0065] E. Fast Physical Access Channel (FPACH) Scheduling Device (105)

[0066] The wireless signal received by the antenna is converted into a digital baseband signal after being amplified, filtered, down-converted, and analog-to-digital converted by the signal receiving device (101), wherein the sampling rate is selected in the analog-to-digital conversion; the local uplink synchronization (SYNC_UL) code The function of generating device (103) is to generate the N adopted by this sub-district. SYNC_UL SYNC...

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Abstract

The invention is a method and device for improving synchronous detecting precision, used in synchronous detection based on ascending time gap in CDMA system, and its method includes the steps: antenna data segment obtaining to determine the data segment where the synchronous code exists; matching filtration: for detecting if there is ascending synchronous access at protective intervals and ascending guide frequency time gap intervals, firstly making shift relation between NSYNC_UL ascending synchronous codes and with antenna received data at protective intervals and ascending guide frequency time gas intervals and obtaining related power sequence; signature identification: detecting and judging the total related frequency sequence and only in the situation of meeting preset detecting conditions can it determine there is ascending synchronous access; fast physical access channel arrangement: making priority processing according to many ascending synchronous signatures in each subframe. It gives a multiple sampling-based method and device fro improving synchronous detecting precision, improving the synchronous detecting precision.

Description

technical field [0001] The present invention relates to a method and device for random access in a wireless communication system, in particular to a method and device for synchronous detection based on uplink pilot time slots in a code division multiple access communication system. Background technique [0002] In the uplink of a synchronous CDMA (Code Division Multiple Access, code division multiple access) communication system, multiple user terminals UE (User Equipment) send signals to the base station (Node B), in order to prevent mutual interference between different user signals , it is necessary to perform synchronous detection and control on each user to ensure that they arrive at the base station at the same time. [0003] The wireless frame of the synchronous CDMA communication system includes several subframes, and in each subframe, in addition to multiple regular time slots, it also includes 3 special time slots, namely the downlink pilot time slot (DwPTS), the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J13/00
Inventor 秦洪峰曾召华
Owner DATANG MOBILE COMM EQUIP CO LTD
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