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3. 发明公开

EP2175598A1 Multiresolution transmission system 失效
标题翻译： Mehrträgerübertragungssystem
公开(公告)号：EP2175598A1
公开(公告)日：2010-04-14
申请号：EP09178793.7
申请日：1993-09-24
申请人： Panasonic Corporation
发明人： Mitsuaki, Oshima
IPC分类号： H04L27/02 , H04L27/18 , H04L27/26 , H04L27/34 , H04L27/38 , H04N7/24
CPC分类号： H04L1/0059 , H03M13/256 , H03M13/356 , H04L1/004 , H04L1/0041 , H04L1/0045 , H04L1/0054 , H04L1/0057 , H04L1/006 , H04L5/0007 , H04L5/0044 , H04L27/02 , H04L27/04 , H04L27/183 , H04L27/2602 , H04L27/2604 , H04L27/3488 , H04L27/3854 , H04L2027/0036 , H04L2027/0053 , H04L2027/0067 , H04N5/4401 , H04N5/455 , H04N7/015 , H04N7/24 , H04N11/004 , H04N19/00 , H04N19/30 , H04N19/37 , H04N19/63 , H04N21/234327 , H04N21/2365 , H04N21/2383 , H04N21/4347 , H04N21/4382 , H04N21/440227 , H04N21/64792
摘要： At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of subchannels, wherein the subchannels are differentiated by changing the length of a guard time slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.
摘要翻译：在发射机侧，根据用于在信号空间图中产生相关信号点的输入信号调制载波。输入信号被分成两个，第一和第二数据流。信号点被划分为分配了第一数据流的数据的信号点组。此外，第二数据流的数据被分配给每个信号点组的信号点。通过将信号点移动到至少在极坐标系中表示的空间图中的其他位置来开发第一和第二数据流之间的传输错误率的差异。在接收机侧，可以从接收到的信号重建第一和/或第二数据流。在电视广播业务中，电视信号由发射机分成低频和高频分量，分别被指定为第一和第二数据流。在接收到TV信号时，接收机可以仅根据其能力再现低频带分量或低频和高频分量。此外，基于OFDM系统的通信系统被用于多个子信道的数据传输，其中通过改变符号传输时隙的保护时隙或载波间隔的长度来对子信道进行微分，或者改变载波的传输电力。

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