Unlock instant, AI-driven research and patent intelligence for your innovation.

CDMA (code division multiple access) communication system

A CDMA communication and mobile station technology, applied in the field of base station devices, can solve the problems of increased transmission power or power consumption, and the inability to achieve high-speed data rates, etc.

Inactive Publication Date: 2012-03-28
FUJITSU LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] In this way, in the existing adaptive modulation technology, if the data rate is to be increased, the transmission power or power consumption will increase.
Or, if it is desired to maintain a certain quality under the specified transmission power, it is often impossible to increase the data rate.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • CDMA (code division multiple access) communication system
  • CDMA (code division multiple access) communication system
  • CDMA (code division multiple access) communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0049] image 3 It is a diagram showing a mobile communication system according to an embodiment of the present invention. exist image 3 Among them, the base station 30 has a function of transmitting and receiving radio signals with a mobile station (MS: Mobile Station) 40 within a communication area. On the other hand, each mobile device 40 has a function of transmitting and receiving radio signals with the base station 30 . Furthermore, the mobile device 40 transmits and receives data via the base station 30 when communicating with another terminal device.

[0050] The above-mentioned communication system is a CDMA communication system. Here, in a CDMA communication system, a symbol (diffusion code) is generally assigned to each channel or each user, and each channel or each user is mutually identified by the diffusion code. However, in the system of the embodim...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a CDMA (code division multiple access) communication system. In CDMA communication system, a determining part (101) of a communication device can inform information multiplexed by codes to a user data separation component (103) and diffusion components (105-1-105-n) when ensuring a plurality of diffusion codes; the user data separation component (103) separates user data and transmits the user data to the diffusion components (105-1-105-n); the diffusion components (105-1-105-n) diffuse the user data by using the mutually different diffusion codes; and a code multiplexing component (106) multiplexes and sends the user data diffused by the diffusion components (105-1-105-n).

Description

[0001] This application is a divisional application for the application number "02828362.7", the application date is February 28, 2002, and the invention name is "communication device for CDMA" (the application number is "201010194176.7", the invention name is "wireless Base station, transmission control method, and wireless transmission device") is a second divisional application. technical field [0002] The present invention relates to a communication device used in a mobile communication system using CDMA, and more particularly to a base station device used in a mobile communication system using CDMA. Background technique [0003] In recent years, CDMA (Code Division Multiple Access: Code Division Multiple Access) technology is being studied as a next-generation mobile communication system for realizing wireless multimedia communication, especially a digital cellular network using DS-CDMA (Direct Spread-CDMA) technology. wireless communication system. [0004] In a CDMA...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04J13/16H04L1/00
Inventor 中村正
Owner FUJITSU LTD