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    • 7. 发明申请
    • SYSTEM AND METHOD FOR SPREAD SPECTRUM COMMUNICATION
    • 用于传播频谱通信的系统和方法
    • WO2003036840A1
    • 2003-05-01
    • PCT/JP2002/010728
    • 2002-10-16
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.OHMI, ShinichiroHARADA, YasuoANDO, Kazuhiro
    • OHMI, ShinichiroHARADA, YasuoANDO, Kazuhiro
    • H04J13/04
    • H04J1/08H04J13/00H04J13/10
    • A spreading code generating apparatus (10) carries out M-sequence multiplication and zero value addition of generated orthogonal codes to obtain channel identification codes, and then carries out inverse Fourier transform of the channel identification codes to generate spreading codes (121) and inverse spreading codes (131). A transmitting apparatus (20) and a receiving apparatus (30) store the spreading codes (121) and the inverse spreading codes (131) generated by the spreading code generating apparatus (10), respectively, and use a single code respectively selected from the stored codes to carry out spread spectrum communication. With the use of the spreading codes for spreading, the input signal is spread over a wide frequency band with uniform power on the frequency axis. Thus, transmission characteristics are improved, and multiplexing capacity is increased.
    • 扩展码产生装置(10)执行生成的正交码的M序列乘法和零值相加以获得信道识别码,然后执行信道识别码的傅立叶逆变换,以产生扩展码(121)和反扩频 代码(131)。 发送装置(20)和接收装置(30)分别存储由扩展码生成装置(10)生成的扩展码(121)和逆扩展码(131),并使用分别从 存储码进行扩频通信。 通过使用扩展码进行扩展,输入信号在频率轴上具有均匀功率的宽频带上扩展。 因此,传输特性得到改善,并且复用容量增加。