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Code division multiplex transmission manner, transmitter and receiver

A technology of code division multiplexing and transmission mode, which is applied in the field of synchronous regeneration technology of multiple transmission data sequences, and can solve problems such as multi-time

Inactive Publication Date: 2007-06-20
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, such conversion takes more time

Method used

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  • Code division multiplex transmission manner, transmitter and receiver
  • Code division multiplex transmission manner, transmitter and receiver
  • Code division multiplex transmission manner, transmitter and receiver

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Embodiment Construction

[0039] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] 1A and 1B show the format structure of a synchronization signal used in the code division multiplexing method of the present invention. This synchronization signal, for example, as shown in FIG. 1A, is a 125 μsec long signal (hereinafter referred to as "pilot symbol (PS)") modulated by a spreading code for synchronization at intervals of 250 μsec and a synchronization signal identical to the pilot signal. This is the result of time-division multiplexing the two signals by combining the 125μsec long frequency spread modulated signal (D) generated by spreading data such as various parameters with the spreading code. As shown in FIG. 1B, for example, this synchronizing signal is composed of 51 pairs of pilot symbols and frequency spread modulation signals as a unit to form a frame, and 6 frames as a unit to form a super frame.

[0041] Each frequenc...

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Abstract

The code division multiplex transmission system according to the present invention produces data for transmission by, time-division multiplexing the signals for synchronizing spread code prepared for an easy synchronization of spread code on the receiving side and the information related to the structure or synchronization of each of a plurality of transmission data streams, generating spread frequency modulated signals of the above time-division multiplexed signals by a spread frequency modulation using a spread code known to the receiving side, and code-division multiplexing the resulting spread frequency modulated signals over the spread frequency modulated signals of the plurality of transmission data streams. As a result, the receiving terminal can obtain information such as parameters information of all the transmission data streams, as long as the receiving terminal receives the synchronization signal. Therefore the receiving terminal can receive any transmission data stream easily and quickly.

Description

[0001] This application is a divisional application of an application with a filing date of November 24, 2000, an application number of 00128328.6, and an invention title of "Code Division Multiplexing Transmission Mode, Sending Equipment, and Receiving Equipment". technical field [0002] The present invention relates to a code division multiplexing (CDM) transmission mode and a receiving device used in this mode, in particular to a synchronous reproduction technique of multiple multiplexed transmission data sequences. Background technique [0003] As we all know, in code division multiplexing transmission, each sequence of multiple transmission data sequences is frequency spread modulated with different spreading codes, and the multiple modulated signals are superimposed on the same frequency for transmission. In such code division multiplexing transmission, as a method of facilitating the synchronization processing of the spreading code at the receiving terminal, a signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04J3/06H04B1/707H04L1/00H03M13/27H04B1/7073H04J11/00H04L7/04
CPCH04B1/7075H04L7/046H04L1/0075H04L1/0025H04L1/0078H04L1/0071H04J13/00H04L1/0059H04B1/7115H04J3/0605H04B1/7073
Inventor 菊池英男芹泽睦横井时彦渡边荣一平川秀治
Owner KK TOSHIBA