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基于光正交跳频码构造原理,分别用改进素数码和光正交码为时域扩频模式和频域跳频模式,并构造了适用于无线光码分多址系统的调整数码/光正交码二维组合码。和现有二维码相比,该组合码容量大,通过有规律的分组,每组内码字具有良好的相关性,同时组内具有较大的码容量。该构造方式易于实现,对构造实例设计了可调谐光纤布拉格光栅编解码器。
Based on the principle of optical orthogonal frequency hopping code construction, the modified prime digital and optical orthogonal codes are used respectively as the time-domain spreading mode and the frequency-domain frequency hopping mode, and the digital / Cross code two-dimensional combination code. Compared with the existing two-dimensional code, the combined code has a large capacity. Through regular grouping, the code words in each group have good correlation, and the code capacity in the group is relatively large. The construction method is easy to implement, and a tunable fiber Bragg grating codec is designed for the construction example.