J4 ›› 2015, Vol. 32 ›› Issue (2): 251-256.

• Optical Communication • Previous Articles    

A novel two-dimensional optical orthogonal code design and performance analysis based on SQPC/OCS

Zhang Xiurong, Li Chuanqi, Yang Mengjie,Chen Meijuan,Fang Qingbin   

  1. Department of Electronic Engineering, Guangxi Normal University, Guilin 541004, China
  • Received:2014-05-05 Revised:2014-05-24 Published:2015-03-28 Online:2015-03-17

Abstract:

A new two-dimensional optical orthogonal code named SQPC/OCS is constructed with SQPC (Synchronous Quadratic Prime Code) as time spreading sequence and OCS (One-coincidence Sequence) as wavelength hopping sequence. The performances of BER (bit error ratio) and word capacity are compared by analyzed and simulated. Theoretical analysis show that SQPC/OCS has the same BER as 2D-QPC(Quadratic Prime Code) when given the same code length and same number of wavelength, but SQPC/OCS can reduce its BER by increased the number of wavelength which is not limited to a prime number. Compared with EPC(Extend Prime Code)/OCS, SQPC/OCS gets lower BER. Moreover, the code capacity of SQPC/OCS is much more than that of 2D-QPC and EPC/OCS. The simulation show that the BER of SQPC/OCS is nearly two orders of magnitude lower and four orders of magnitude lower than that of 2D-QPC(p=7and q=13)and EPC/OCS(p=11 and q=15) while the number of synchronous users equals 20,respectively.

Key words: Optical communication, OCDMA system, OCS, BER, Code capacity