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Spectrum spreading communication system using single spreading code

A technology of spectrum expansion and communication system, which is applied in the direction of multiplex communication, code division multiplex system, communication between multiple stations, etc., and can solve the problem that the mobile station cannot be easily determined

Inactive Publication Date: 2003-07-02
NEC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Furthermore, even if an initial synchronization correlation unit (a searcher) acquires burst signals from mobile stations, mobile stations in each path cannot easily determine
Therefore, there is a problem that it is impossible to optimally realize RAKE combining, which is a technique to significantly improve the quality of communication, especially spectrum spread communication system

Method used

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  • Spectrum spreading communication system using single spreading code
  • Spectrum spreading communication system using single spreading code
  • Spectrum spreading communication system using single spreading code

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Embodiment Construction

[0046] Next, the spectrum spread communication system of the present invention will be described with reference to these drawings.

[0047] figure 2 is a block diagram showing the structure of a mobile communication network in the spectrum spread communication system of the present invention. exist figure 2 In this case, the mobile communication network is connected to a public telephone line network as an existing wired communication network through a mobile communication system control unit and a switching device 100. The communication is performed by the mobile communication system control part and the switching device 100 in the mobile communication network and between the mobile communication network and the public telephone line network. Note that the mobile communication system control section and switching apparatus 100 is an apparatus including a switching apparatus for mobile communication and a control unit for controlling radio base stations 300 of a plurality ...

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Abstract

A spectrum spreading communication system including a radio base station includes a receiving section, a correlation detecting section, a rake synthesizing section and a control section. The receiving section receives a radio signal to produce a digital burst signal. Transmission data of the radio signal respectively including different pilot patterns and data, are subjected to spectrum spreading using a single spreading code, and are transmitted on a same frequency band. The correlation detecting section performs a tracking operation to the burst signal for each of paths to produce a tracking resultant data. The paths are specified based on a path data.

Description

technical field [0001] The present invention relates to a spectrum spread communication system, and more particularly to a spectrum spread communication system suitable for transmitting random burst signals simultaneously using the same spreading code from a plurality of mobile stations to a radio base station on the same frequency band. Background technique [0002] An existing mobile communication system employing this type of spread spectrum communication system is disclosed in Japanese Patent Application (KOKAI Publication No. Hei 5-227124). figure 1 is a block diagram illustrating a receiving system used in a CDMA communication system as a prior art. [0003] The CDMA communication system is composed of a radio base station 300 and a plurality of mobile stations 200 . A spreading code is allocated to communication between the radio base station 300 and each mobile station 200 so that two-way communication can be realized. The wireless base station 300 combines pilot s...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B1/7103H04B1/7113H04B1/7115H04B1/7117H04B7/26H04L7/00
CPCH04B1/7115H04B1/7113H04B2001/70706H04B1/7117H04B1/7103H04B2201/70701H04B1/709
Inventor 近藤毅幸
Owner NEC CORP
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