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对异步系统中等重对称光正交码的多址性能进行了分析。在不考虑热噪声、量子噪声和散弹噪声的情况下 ,分别得到了码长、码重、判决门限、用户数和互相关值等对系统误码率的影响曲线。在 chip同步的情况下 ,得到了系统的误码率上限。我们发现系统的误码率受码长 ,码重 ,判决门限 ,用户数和互相关值的影响。当其它四个参量固定时 ,误码率分别随着码长 ,判决门限的增加而减小 ,随着用户数 ,码重 ,互相关值的增加而增加 ;其他三个参量固定时 ,误码率随着码重和判决门限的增加而减小。这可以作为对等重对称光正交码应用的参考
The multiple access performance of equal weight symmetric optical orthogonal code in asynchronous system is analyzed. Without considering thermal noise, quantum noise and shot noise, the influence of the code length, code weight, decision threshold, number of users and cross-correlation value on the bit error rate of the system are obtained respectively. In the case of chip synchronization, the maximum error rate of the system is obtained. We found that the system bit error rate by the code length, code weight, the threshold of the decision, the number of users and cross-correlation value. When the other four parameters are fixed, the bit error rate decreases with the increase of code length and decision threshold, and increases with the increase of user number, code weight and cross-correlation value. When the other three parameters are fixed, the bit error rate The rate decreases as the code weight and decision threshold increase. This can serve as a reference for the application of isosymmetric optical orthogonal codes