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Synchronous detection equipment

A technology of synchronous detection and equipment, applied in the direction of synchronization device, communication between multiple stations, transmission system, etc., can solve the problems of multi-time, time-consuming sliding correlator, etc.

Inactive Publication Date: 2005-03-16
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the time required to find the correlation output for one spreading code timing, compared with the spreading code chip interval time of the matched filter, when the number of chips increased for finding the correlation is M, the sliding correlator It takes M slices of time
Therefore, sliding correlators are suboptimal for finding and comparing correlated outputs with temporally wide range timings as it takes too much time

Method used

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Embodiment Construction

[0029] The following will be combined with reference Pic 4-1 0 describes the first embodiment of the present invention.

[0030] This embodiment is applied to a synchronization detection device for receiving data wirelessly transmitted from a base station. The CDMA system, which spreads and transmits data through a prescribed spreading code, is applied to a wireless transmission system for wireless transmission between a base station and a receiving terminal device. A synchronization detecting device in a receiving terminal device detects the timing of such spreading codes. In the case of the present embodiment, the spreading codes of the spread data transmitted to each of the different base stations and the spreading codes of the data which have been output from the transmitting stations (base stations) are known to the synchronization detecting device of the present invention. To some extent, a separate process is used to estimate the phase range of the spreading code (in...

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Abstract

In order to detect a plurality of correlations in a spread code cycle when receiving CDMA type signals spread with a prescribed spread code and performing correlation detections using matched filters, a synchronicity detection device detects the timing of a prescribed spread code included in a reception signal. The device includes a correlation coefficient generation means (130) which divides and generates a replica code of a spread code of a prescribed length while the phase advances at each interval of a prescribed width. Matched filters (103,104) perform detection of correlation values of reception signals and replica codes are generated by the correlation coefficient generation means at each interval of a prescribed width.

Description

technical field [0001] The present invention relates to a kind of synchronous detection equipment in the communication terminal equipment, and particularly relates to a kind of synchronous detection equipment which is applied to the cellular wireless communication system of CDMA (Code Division Multiple Access) technology, and is most suitable for the system. Background technique [0002] CDMA technology is a multiplexing technology using spreading codes. Its application in cellular wireless systems has been studied as a wireless access technology for next-generation mobile communications, and has been realized in some systems. In a cellular wireless communication system, the area where communication services are provided is divided into cells according to the desired scale, and a base station as a fixed station is set in each cell, and a communication terminal system as a mobile station is connected to a system that is considered to have the best communication capability. co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7073H04B1/707H04B1/7093H04L7/00
CPCH04B1/70756H04B1/70753H04B1/7075H04B1/7093
Inventor 寺岛一彦内藤将彦
Owner SONY CORP