论文部分内容阅读
提出了一种新颖的多速率光码分多址系统的实现方案,使得光码分多址系统能够同时传输不同速率的用户信号。对系统的误码性能进行了理论分析,并讨论了在系统中加入硬件限幅器以提高系统性能的可能性。以同时传输两种不同速率信号为例,将系统与变码长光码分多址系统的误码性能进行了仿真和比较。分析表明,随着速率的增加,虽然地址码字的性能有一定下降,但其整体性能仍优于变码长的多速率的光码分多址系统。最后,设计了相应的实验,验证了码字的性能和实现多速率光码分多址系统的可能性。
A novel scheme of multi-rate optical code division multiple access system is proposed, which enables optical code division multiple access system to transmit user signals of different rates at the same time. The theoretical analysis of the BER performance of the system is discussed, and the possibility of adding a hardware limiter to the system to improve system performance is discussed. Taking the case of transmitting two different rate signals at the same time as an example, the error performance of the system and variable length long code optical code division multiple access system is simulated and compared. The analysis shows that with the increase of the rate, although the performance of the address code word declines somewhat, its overall performance is still better than that of the multi-rate optical code division multiple access system with variable length. Finally, corresponding experiments are designed to verify the performance of codewords and the possibility of implementing multi-rate optical code division multiple access system.