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    • 1. 发明专利
    • Light ofcdm transmission system
    • 空值
    • JP5095834B2
    • 2012-12-12
    • JP2011055141
    • 2011-03-14
    • 日本電信電話株式会社
    • 慎 金子準基 三鬼
    • H04B10/2507H04B10/556H04B10/69H04J11/00H04J14/00H04J14/04H04J14/06
    • PROBLEM TO BE SOLVED: To provide an optical receiving circuit, an optical receiver and an optical transmission system, capable of receiving with a constant code error rate independently of a multiplex number, although conventionally a signal light intensity rapidly attenuates according to the square of the multiplex number as the multiplex number increases and the code error rate increases. SOLUTION: The optical receiving circuit, the optical receiver and the optical transmission system perform discrete Fourier transform of an integral action and an identification operation in an electricity field after converting an optical signal into an electrical signal. The number of branches M of an electrical branching means 35 included in an electrical integrating means 33 is not related to the multiplex number N of an optical OFDM (orthogonal frequency division multiplexing) signal. Consequently, the number of branches in the receiving circuit does not change, even if the multiplex number N increases while a signal light intensity to be input to the receiving circuit is in a fixed state, thereby a BER (bit error rate) can be prevented from deterioration. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了提供能够以与多路复用数独立的恒定码错误率接收的光接收电路,光接收机和光传输系统,尽管传统上信号光强度根据 作为多路复用数的多路复用数字的平方值增加并且码错率增加。 光接收电路,光接收器和光传输系统在将光信号转换成电信号之后,在电场中执行积分动作和识别操作的离散傅里叶变换。 包括在电积分装置33中的电分支装置35的分支数M与光OFDM(正交频分复用)信号的多路复用数N无关。 因此,即使多路复用数N增加,输入到接收电路的信号光强度处于固定状态,接收电路中的分支数也不变化,从而可以防止BER(误码率) 从恶化。 版权所有(C)2011,JPO&INPIT
    • 7. 发明专利
    • Optical code division multiplexing transmission system and optical code division multiplexing transmission method
    • 空值
    • JP5334747B2
    • 2013-11-06
    • JP2009191903
    • 2009-08-21
    • 日本電信電話株式会社
    • 慎 金子準基 三鬼秀明 木村裕生 鈴木
    • H04J14/00H04B1/707H04B10/2507H04B10/516H04B10/54H04B10/588H04B10/61H04J13/00H04J14/04H04J14/06
    • PROBLEM TO BE SOLVED: To provide an optical CDM transmission system and an optical CDM transmission method, which require no adjustment of intervals between voltage levels corresponding to symbol values of multiple-value electric signals generated even if a multiplexing number N of a binary data signal changes, and which can extend N to more than 3 and flexibly. SOLUTION: In an optical CDM transmission system and an optical CDM transmission method, a binary dummy signal is added to a binary data signal inputted to a binary/multiple-value conversion means, and multiple values are made fixed regardless of a multiplexing number of the binary data signal, whereby multiple-value ASK signal light is generated whose light strength levels corresponding to symbol values become an equal interval without adjusting voltage levels corresponding to the symbol values of multiple-value electric signals generated by the binary/multiple-value conversion means even when the multiplexing number increases/decreases. COPYRIGHT: (C)2011,JPO&INPIT
    • 解决的问题:提供一种光学CDM传输系统和光学CDM传输方法,其不需要调整与产生的多值电信号的符号值相对应的电压电平之间的间隔,即使多路复用数N为 二进制数据信号变化,并且可以将N扩展到3以上并且可以灵活地扩展。 解决方案:在光学CDM传输系统和光学CDM传输方法中,将二进制虚拟信号添加到输入到二进制/多值转换装置的二进制数据信号中,并且多个值被固定而不管多路复用 二进制数据信号的数量,由此产生多值ASK信号光,其中对应于符号值的光强度级别变为相等的间隔,而不调整与二进制/多位数据信号产生的多值电信号的符号值相对应的电压电平, 即使当复用数目增加/减少时,值转换也意味着。 版权所有(C)2011,JPO&INPIT