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公开(公告)号：US08532068B2
公开(公告)日：2013-09-10
申请号：US13490744
申请日：2012-06-07
申请人： Raiz Esmailzadeh , Takashi Yano , Nobukazu Doi
发明人： Raiz Esmailzadeh , Takashi Yano , Nobukazu Doi
IPC分类号： H04B7/216
CPC分类号： H04B7/2628 , H04B1/707
摘要： Particular orthogonal codes are transmitted from the mobile stations to the base station as alert signals indicating the presence of data to be transmitted. The base station checks whether particular orthogonal codes are contained in the alert signals, and when the particular orthogonal codes are detected in the alert signals, information representing the detected orthogonal codes and the schedules for transmitting the data from the mobile terminals to the base station are transmitted from the base station to the mobile terminals as an alert response to the alert signals. When the information representing the orthogonal codes used for the alert signals are contained in the alert response transmitted from the base station to the mobile terminals, the data waiting to be transmitted is transmitted from the mobile terminals to the base station according the data transmission schedules in the alert response.
摘要翻译： 将特定的正交码从移动台发送到基站，作为指示要发送的数据的存在的警报信号。 基站检查警报信号中是否包含特定正交码，并且当在警报信号中检测到特定的正交码时，表示检测到的正交码的信息和用于从移动终端向基站发送数据的时间表是 从基站发送到移动终端作为对警报信号的警报响应。 当表示用于警报信号的正交码的信息被包含在从基站发送到移动终端的警报响应中时，等待发送的数据根据数据传输时间表从移动终端发送到基站 警报响应。
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公开(公告)号：US06185244B2
公开(公告)日：2001-02-06
申请号：US09129151
申请日：1998-08-05
IPC分类号： H04L2730
CPC分类号： H04B1/7083 , H04J13/107 , H04L7/043
摘要： A special coding scheme is disclosed for more effectively acquiring a long code and frame timing during a cell search in a CDMA communications system. A code set of length M Q-ary code words including symbols from a set of Q short codes is defined with certain properties. The primary property to be satisfied is that no cyclic shift of a code word yields a valid code word. The other properties to be satisfied are that there is a one-to-one mapping between a long code message and a valid code word, and a decoder should be able to find both the random shift (thereby implicitly finding the frame timing) and the transmitted code word (i.e., its associated long code indication message) in the presence of interference and noise, with some degree of accuracy and reasonable complexity.
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