通信学报2026，Vol.47Issue(3)：278-288,11.DOI:10.11959/j.issn.1000-436x.2026060
贪婪结构感知算法赋能的OOFDM双模差分索引调制方案
OOFDM with dual-mode differential index modulation enabled by greedy structure-aware algorithm
摘要
Abstract
To address the limited spectral efficiency of optical orthogonal frequency division multiplexing with differen-tial index modulation system and the high computational complexity of the differential maximum likelihood detection al-gorithm,an OOFDM with dual-mode differential index modulation enabled by greedy structure-aware algorithm was proposed.Firstly,secondary indexing was introduced for dual-mode constellation symbols of the same order,thereby fur-ther exploiting the information-carrying potential of symbol resources to enhance spectral efficiency.Secondly,by adopt-ing the maximum structured average magnitude as the decision criterion,the search space was dynamically reduced,and effective detection could be achieved by traversing only the most probable candidate signal matrix set.Simulation results demonstrate that,compared with the benchmark scheme,the proposed scheme improves spectral efficiency by 8.33%to 33.33%while incurring only a 1 to 3 dB performance loss.In comparison with the benchmark algorithm,the proposed detection algorithm reduces computational complexity by 18.75%to 94.74%without any performance degradation.Therefore,the joint design of the proposed scheme and detection algorithm achieves an effective optimization and trade-off among spectral efficiency,computational complexity,and bit error performance.关键词
光正交频分复用/差分索引调制/频谱效率/计算复杂度Key words
optical orthogonal frequency division multiplexing/differential index modulation/spectral efficiency/compu-tational complexity分类
信息技术与安全科学引用本文复制引用
王真,王惠琴,唐崎涵,彭清斌,张悦..贪婪结构感知算法赋能的OOFDM双模差分索引调制方案[J].通信学报,2026,47(3):278-288,11.基金项目
国家自然科学基金资助项目(No.62261033,No.62565014) （No.62261033,No.62565014）
甘肃省优秀博士生项目(No.26JRRA557,No.25JRRA121) （No.26JRRA557,No.25JRRA121）
2026年甘肃省高校研究生"创新之星"项目(No.2026CXZX-539) （No.2026CXZX-539）
甘肃省青年科技基金资助项目(No.24JRRA974) （No.24JRRA974）
兰州理工大学博士基金资助项目(No.14062101) The National Natural Science Foundation of China(No.62261033,No.62565014),Gansu Provincial Outstand-ing Doctoral Student Program(No.26JRRA557,No.25JRRA121),2026 Gansu Province Graduate Student Innovation Star Program(No.2026CXZX-539),The Youth Science and Technology Foundation of Gansu Province(No.24JRRA974),The Doctoral Research Foundation of Lanzhou University of Technology(No.14062101) （No.14062101）
