Then, the performance of BCH coded FFH OCDMA system was analyzed, and was compared with uncoded FFH OCDMA system.

论述了BCH信道编码对FFH- OCDMA系统性能的影响，并将它和未编码的FFH- OCDMA系统进行了比较。

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Meanwhile, synchronization is also the difficulty of the development of FH system, which needs supplicated design especially in the fast frequency hopping (FFH).

同时跳频同步也是跳频通信系统开发的难点，特别在高跳速工作时实现同步捕获和跟踪需要精心设计方案。

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The results of simulation show that dispersion seriously reduces the peak power and sample energy on the FFH OCDMA system. Hence, bit error rate(BER) of system is increased by dispersion.

结果表明，在FFH- OCDMA系统中，光纤色散导致解码自相关光脉冲峰值功率和光脉冲取样能量的降低，进而导致系统误码率（BER ）的增加。

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Whitney Tilson, managing partner at T2 Partners Management in New York City, has been buying shares of Fairfax Financial (nyse: FFH - news - people ), a Canadian insurer and a favorite target of short-sellers.

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