公开(公告)号：EP0930744A1

公开(公告)日：1999-07-21

申请号：EP98100018.5

申请日：1998-01-02

申请人： NewTec CY N.V.

发明人： Breynaert, Dirk ,  Delaruelle, Daniel

IPC分类号： H04L5/02

CPC分类号： H04L5/023

摘要： The present invention includes a telecommunications system including a plurality of transmitters (20), each transmitter (20) transmitting a modulated signal on one carrier of a set of equally spaced carriers at any one time, said transmitters (20) being co-ordinated by frequency division multiplexing and synchronised to produce an orthogonal frequency division multiplex (OFDM) signal at a receiver (10).
The present invention also includes a method of operating a telecommunication system, comprising the steps of:

transmitting from each transmitter of a plurality of transmitters a modulated data stream on one carrier of a set of equally spaced carriers at any one time, co-ordinating and synchronising the transmissions of the plurality of transmitters so as to produce an orthogonal frequency multiplexed (OFDM) signal at a receiver.

A transmitter (20) is also described for transmitting a modulated data stream on one carrier of a set of equally spaced carriers at any one time, the spacing of said carriers being at the baud rate or a multiple thereof comprising:

a modulator (31) for modulation of a data stream,
a means (31) for sequentially hopping between at least two of said carriers.

The present invention also includes satellite receiver for receiving an orthogonal frequency multiplexed (OFDM) signal including a set of equally spaced carriers, each carrying a modulated data stream, the satellite receiver including a demodulator for demodulating the OFDM signal.
The modulation of the data stream in accordance with the present invention is preferably substantially constant envelope.

摘要翻译： 本发明包括一个包括多个发射机（20）的电信系统，每个发射机（20）在任何一个时刻在一组等距载波的一个载波上传送调制信号，所述发射机（20）由 频分复用并被同步以在接收机（10）处产生正交频分复用（OFDM）信号。 本发明还包括一种操作电信系统的方法，包括以下步骤：在多个发射机的每个发射机上，在一个等距间隔的载波集合的一个载波上发射调制的数据流，协调和 同步多个发射机的传输，以便在接收机处产生正交频分复用（OFDM）信号。 还描述了发射机（20），用于在任何一个时间在一组等距载波的一个载波上发射调制数据流，所述载波的间隔处于波特率或其倍数，包括：调制器（31） 用于数据流的调制，用于在至少两个所述载波之间顺序跳频的装置（31）。 本发明还包括用于接收正交频分复用（OFDM）信号的卫星接收机，所述正交频分复用（OFDM）信号包括一组等间隔的载波，每个载波携带调制的数据流，所述卫星接收机包括用于解调OFDM信号的解调器。 根据本发明的数据流的调制优选地是基本恒定的包络。