The power spectrum computation and spectrum performance evaluation of a new optical modulation code

Zhen Ye; Diqing Hu

doi:10.1117/12.821981

19 March 2009 The power spectrum computation and spectrum performance evaluation of a new optical modulation code

Zhen Ye, Diqing Hu

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71252F (2009) https://doi.org/10.1117/12.821981
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

Abstract

The traditional method of power spectrum computation of modulation code is that firstly computing the autocorrelation function of the code, and then taking Fourier transform of the autocorrelation function to get the power spectrum. Unfortunately, it is difficult to get autocorrelation function according to the coding methods, therefore, the traditional method is not fit to compute power spectrum of practical RLL code. In this article, we use a method that is based on onestep state-transition matrix is much simpler, which all the parameters can be computed according to RLL coding methods. We use the method to compute the power spectrum of a new modulation code called RLL (2, 12; 8, 15), and evaluate the spectrum performance of the new modulation code according to the power spectrum. Meanwhile, we improve the new modulation code in order to get a better spectrum performance.

Citation Download Citation

Zhen Ye and Diqing Hu "The power spectrum computation and spectrum performance evaluation of a new optical modulation code", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71252F (19 March 2009); https://doi.org/10.1117/12.821981

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