论文部分内容阅读
线性组合码(LCC)具有码族容量大、误码率(BER)低等优点,是实现光码分多址(OCDMA)的一种有效手段。通过改变组成线性组合码的子码字数可以实现多速率传输。利用基于线性组合码的二维时域/频域光纤光栅编/解码器,建立了多速率随机接入实验平台,成功实现了双用户发送和双用户接收的双速率光码分多址数据通信。线性组合码选用素数跳频码(PC)为子码族,实验中取素数为3的素数码控制时间扩频和波长跳频。实验验证了线性组合码多速率光码分多址接入系统方案的可行性。
Linear combination code (LCC) has the advantages of large code family capacity and low bit error rate (BER), which is an effective way to realize optical code division multiple access (OCDMA). Multi-rate transmission can be achieved by changing the number of sub-words that make up the linear combination code. A multi-rate random access experimental platform is established by using a two-dimensional time-domain / frequency domain optical fiber encoder / decoder based on a linear combination code. The dual-rate optical code division multiple access data communication with dual user transmission and dual user reception is successfully achieved . The linear combination code uses the prime frequency hopping code (PC) as the sub-code family. In the experiment, the prime number with prime number 3 controls the time spreading and the wavelength hopping. The feasibility of the linear combination code multi-rate optical code division multiple access system is experimentally verified.