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    • 6. 发明申请
    • METHOD AND APPARATUS FOR CYCLIC SHIFTED SUB-CARRIER MAPPING
    • 用于循环移位子载波映射的方法和装置
    • WO2007081182A1
    • 2007-07-19
    • PCT/KR2007/000238
    • 2007-01-15
    • SAMSUNG ELECTRONICS CO., LTD.BEIJING SAMSUNG TELECOM R & D CENTERBU, BingLEE, Ju-HoLI, XiaoqiangZHANG, Yujian
    • BU, BingLEE, Ju-HoLI, XiaoqiangZHANG, Yujian
    • H04L27/26
    • H04L27/2608H04L1/1819
    • The method for cyclic shifted sub-carrier mapping in a transmitting end comprising steps of: mapping several input data bits to a symbol from a modulation symbol set and output the resulting modulated symbol; when retransmitting data packets, obtaining the mapping relationship between modulation symbols and sub-carriers used in the current transmission by cyclic shifting the mapping relationship between modulation symbols and sub-carriers in the last transmission; modulating and sending the modulated symbols on various sub-carriers. The present invention is uses the method on cyclic shifted sub-carrier mapping to make the same bits transmitted on different sub-carriers when transmitting in different transmissions of the same HARQ process, thus acquiring frequency diversity gain, reducing HARQ transmission failure rate due to some bits transmitted all the time in sub-carrier that experiences deep fading.
    • 在发送端的循环移位子载波映射的方法包括以下步骤:将多个输入数据位映射到来自调制符号集合的符号,并输出所得到的调制符号; 当重传数据包时,通过循环移位最后传输中的调制符号和子载波之间的映射关系,获得当前传输中使用的调制符号和子载波之间的映射关系; 调制和发送调制符号在各种子载波上。 本发明使用循环移位子载波映射的方法,使得在相同HARQ进程的不同传输中发送时在不同子载波上发送的相同比特,从而获得频率分集增益,从而减少由于一些HARQ传输失败率 所有时间都在经历深度衰落的子载波中传输。