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    • 24. 发明申请
    • SPREAD SPECTRUM COMMUNICATION SYSTEM AND DECENTRALIZED CONTROL WIRELESS NETWORK FOR IMPLEMENTING CDMA THROUGH APPLICATION OF A SINGLE SPREAD SPECTRUM CODE HAVING DIFFERENT PHASE SEQUENCES
    • 传播频谱通信系统和分散控制无线网络,通过应用具有不同相序的单个传播频谱码来实现CDMA
    • WO2007012289A1
    • 2007-02-01
    • PCT/CN2006/001898
    • 2006-07-28
    • BEIJING TRANSPACIFIC TECHNOLOGY DEVELOPMENT LTD.SHANGHAI UNIVERSITYCHEN, XihaoCHEN, Huimin
    • CHEN, XihaoCHEN, Huimin
    • H04J13/00
    • H04B7/2693H04B1/7075H04B1/7115H04J13/10
    • This invention discloses a spread spectrum communication system and a decentralized control wireless network applying different phase sequences of a single spread spectrum code to realize CDMA. The system includes a clock extractor, a clock synchronization unit, a control time slot generation unit, a matching unit, a related multipath selection unit, a demodulation unit, a processing control unit, a PN code set generator, a code multipath selection unit, a spread spectrum modulation unit and a duplexer. The clock extractor receives wireless signals and provides a clock for the system. The clock synchronization unit generates Chip clock pulses that are synchronized to the clock. The matching unit receives the wireless signals to generate multipath matched signals while the related multipath selection unit selects related values in an assigned time slot for outputting to the demodulation unit. The demodulation unit finishes the demodulation of information carried by related peaks. At the same time, the processing control unit obtains the related data values in the assigned time slots to process data within a specified period. The processing control unit then assesses the pulse levels of related peaks and, depending on the state use of channels, selects suitable phase sequences as spread spectrum codes for transmitting signals, or selects an arranged phase sequence as the local spread spectrum code for reception use. Because the system applies different phase sequences of a single spread spectrum code for implementing CDMA, this allows nodes to realize dynamic distribution of spread spectrum code sequences, without the need of a control centre, such as a base station, for implementing the dynamic distribution of spread spectrum code sequences.
    • 本发明公开了一种扩展频谱通信系统和分散控制无线网络,其应用单个扩频码的不同相位序列来实现CDMA。 该系统包括时钟提取器,时钟同步单元,控制时隙生成单元,匹配单元,相关多路径选择单元,解调单元,处理控制单元,PN码集发生器,码多径选择单元, 扩频调制单元和双工器。 时钟提取器接收无线信号并为系统提供时钟。 时钟同步单元产生与时钟同步的芯片时钟脉冲。 匹配单元接收无线信号以产生多路径匹配信号,而相关的多径选择单元在分配的时隙中选择相关值以输出到解调单元。 解调单元完成由相关峰值携带的信息的解调。 同时,处理控制单元获得指定时隙中的相关数据值,以在指定的时间段内处理数据。 然后,处理控制单元评估相关峰值的脉冲电平,根据信道的状态使用,选择合适的相位序列作为用于发射信号的扩频码,或选择排列的相位序列作为用于接收使用的局部扩频码。 由于系统应用用于实现CDMA的单个扩展频谱码的不同相位序列,这允许节点实现扩频码序列的动态分布,而不需要诸如基站的控制中心来实现动态分布 扩频码序列。