Performance Comparison of PS Star-16QAM and PS Square-Shaped 16QAM (Square-16QAM)

• Main Authors: Bo Liu, Ying Zhang, Kaihui Wang, Miao Kong, Lijia Zhang, Qi Zhang, Qinghua Tian, Xiangjun Xin
• Format: Article
• Language: English
• Published: IEEE 2017-01-01
• Series: IEEE Photonics Journal
• Subjects: Probabilistic shaping (PS); star-16QAM; square-16QAM; homodyne coherent detection
• Online Access: https://ieeexplore.ieee.org/document/8060519/
• ISSN: 1943-0655

We investigate and compare the performance of star-shaped 16-ary quadrature amplitude modulation (Star-16QAM) and square-shaped 16QAM (Square-16QAM) in the probabilistic shaping (PS) and uniform schemes with coherent detection. With the help of PS technology, the bit error ratio (BER) improvement achieved in the PS-Star-16QAM scheme is greater than that of the PS-Square-16QAM when compared with the uniform schemes in our numerical simulation and experiment. Therefore, the PS-Star-16QAM shows superiority over the PS-Square-16QAM in terms of the BER improvement.