Title:
【発明の名称】デイジタル無線送信システムにおけるメッセージ送信のための方法と装置
Document Type and Number:
Japanese Patent JPH0722277
Kind Code:
B2
Abstract:
A method and apparatus for use in a digital radio transmission system comprising stationary radio stations arranged in a cellular network and to which are assigned a plurality of mobile radio stations. Transmission of digital messages from a stationary radio station to the mobile radio stations assigned to it is effected by wide-band code division multiplex modulation, and transmission of digital messages from such mobile radio stations to the stationary radio station is effected by narrow-band frequency multiplex modulation. This reduces bandwidth requirements and improves the signal-to-noise ratio for each direction of transmission.
Inventors:
Christoph Grouell
Ludwig Kitztel
Werner Schmidt
Ulrich Vuelence
Ludwig Kitztel
Werner Schmidt
Ulrich Vuelence
Application Number:
JP28451485A
Publication Date:
March 08, 1995
Filing Date:
December 19, 1985
Export Citation:
Assignee:
NVA Phillipps Guriyuran Penfu Abreken
International Classes:
H04B7/26; H04J13/00; H04W88/08; H04J4/00; (IPC1-7): H04J13/00; H04B7/26
Domestic Patent References:
| JP59500592A | ||||
| JP58186236A |
Attorney, Agent or Firm:
Toshio Yano
Next Patent: スペクトラム拡散通信方式