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AN UPLINK TIMING SYNCHRONIZATION METHOD IN OFDMA SYSTEM
AN UPLINK TIMING SYNCHRONIZATION METHOD IN OFDMA SYSTEM
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机译：OFDMA系统中的一种上行定时同步方法
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摘要
The present invention is an orthogonal frequency division multiple access (OFDMA) system using the BWA (BWA) systems in, GPS (Global Positioning System) relates to the time synchronization method of an uplink by using a receiver. Uplink time synchronization method according to the invention, a) comprising a plurality of terminal receiving the broadcast information the first time information is received from the GPS cylinder every frame from the base station, respectively; b) a plurality of terminals and extracting the first time information from the broadcast information transmitted from each base station, comprising: obtaining a second time information from the GPS receiver; c) comprising a plurality of terminals and calculating the difference in each of the first and second time information; And d) a plurality of terminals comprises the step itself fit for a time synchronization on the basis of each of the calculated time information. According to the present invention, without giving a message that the base station and the terminal in an OFDMA system, terminals can use the GPS receiver by itself meet the fast time synchronization of the uplink, to enable the location of the mobile terminal when the terminal moves at a high speed When you move quickly to reduce the error in the uplink time synchronization that can occur.
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