公开(公告)号：EP1324624A1

公开(公告)日：2003-07-02

申请号：EP01983410.0

申请日：2001-07-30

申请人： Huawei Technologies Co., Ltd.

发明人： WANG, Jing Huawei Service Centre Building ,  YU, Lin Huawei Service Centre Building ,  ZHANG, Qiang Huawei Service Centre Building ,  QIAN, Lai Huawei Service Centre Building

IPC分类号： H04Q7/20

CPC分类号： H04L27/2092 ,  H04L25/03859 ,  H04L27/2075

摘要： 8PSK modulation methods and apparatuses are provided. In a first embodiment, product factors of symbol vectors and a coefficient of a shape filter are stored in a table and compressed by 8 times based on a law of a trigonometric function, wherein a method of table looking-up is used to replace a multiplication operation. In a second embodiment, all states of 8PSK modulation are stored in a table after shape filtering, and then the data of the states stored in the table are compressed based on a corresponding relationship of a law of a trigonometric function and an electrical level diversity, and then a table looking-up operation is performed. In a third embodiment, new modulated vectors are stored in a modulated phase table after simple 8PSK modulation and phase rotation, the modulated phase table is compressed by 4 times, and new modulated vectors are obtained by a table looking-up operation and data processing. Then, shape filtering is performed by utilizing a RAM coefficient filter. The 8PSK modulation methods and apparatuses are compatible with GSM systems and are capable of providing sufficient capability of data services and sufficiently extending a life cycle of prior GSM systems. It allows a service agent not only to save investment, but also to provide competitive services.

摘要翻译： 提供了8PSK调制方法和装置。 在第一实施例中，符号向量的乘积因子和形状滤波器的系数被存储在表中，并且基于三角函数的定律被压缩8倍，其中使用表查找的方法来代替乘法 操作。 在第二实施例中，在形状滤波之后将8PSK调制的所有状态存储在表中，然后基于三角函数定律和电位分集的对应关系来压缩存储在表中的状态的数据， 然后执行表查找操作。 在第三实施例中，在简单的8PSK调制和相位旋转之后，将新的调制矢量存储在调制相位表中，将调制相位表压缩4倍，并通过表查找操作和数据处理获得新的调制矢量。 然后，利用RAM系数滤波器进行形状滤波。 8PSK调制方法和装置与GSM系统兼容，并且能够提供足够的数据服务能力并充分延长先前GSM系统的生命周期。 它允许服务代理商不仅节省投资，而且还提供有竞争力的服务。