提出了一种基于OFDM信号子载波信噪比的LDPC-OOFDM-PON系统纠错码方案。该方案通过对性能差的子载波采取不同码率的编码,改善了系统的总误码性能。采用Matlab软件对系统进行仿真,并在实验室搭建光链路,仿真和离线实验结果表明该系统切实可行。
The paper proposes a LDPC-OOFDM-PON error correction scheme based on the SNR of OFDM signals' subcarrier. It improves the total BER by using different code rate to encode for subcarriers with low performance. Simulation on Matlab and off-line optical channel experiment demonstrate the scheme is avail- able in OOFDM-PON system.