A new code construction algorithm based on Double Weight codes for SAC-OCDMA systems

摘要

Double Weight (DW) code families are constructed with different algorithms and fixed value of users at basic code matrix. A single code construction algorithm is proposed for DW code families in which, number of users for basic code matrix depends on the code weight and on a constant value. Mapping is used to provide the greater number of users. Affect of basic matrix (used in mapping) on Bit Error Rate (BER) and code length is analyzed. The properties of proposed code construction algorithm are easy code construction, any positive integer value of weight is used for code construction, design of different code set by varying size of basic matrix. Ex-OR function is used in balanced detection technique at receiver. Numerical results are calculated using MATLAB.