Johannisson Pontus, Sjödin Martin, Karlsson Magnus, Wymeersch Henk, Agrell Erik, Andrekson Peter A
Photonics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
Opt Express. 2011 Apr 11;19(8):7734-41. doi: 10.1364/OE.19.007734.
By using a generalized cost function, a modified constant modulus algorithm (CMA) that allows polarization demultiplexing and equalization of polarization-switched QPSK is found. An implementation that allows easy switching between the conventional and the modified CMA is described. Using numerical simulations, the suggested algorithm is shown to have similar performance for polarization-switched QPSK as CMA has for polarization-multiplexed QPSK.
通过使用广义代价函数，发现了一种改进的恒模算法（CMA），该算法可实现偏振解复用以及偏振切换四相相移键控（QPSK）的均衡。文中描述了一种能在传统CMA和改进CMA之间轻松切换的实现方法。通过数值模拟表明，所提出的算法对于偏振切换QPSK具有与CMA对于偏振复用QPSK相似的性能。
