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For a better utilization of spectrum resources, each user is allocated a private subcarrier for reference signal transmission, while the remaining subcarriers are public and shared by all users to transmit their own data-bearing signals. To avoid user interferences in this design, users are distinguished in a code division multiple access (CDMA) way based on Walsh codes. By exploiting the redundancies in the transmitted signals, repeated segments of received signals are averaged, leading to greatly reduced noises and a noticeable improvement in bit error rate (BER) performance. BER expressions of this new system are derived over the additive white Gaussian noise (AWGN) and multi-path Rayleigh fading channels. Simulation results and comparisons are performed to verify the feasibility and advantages of this new scheme. <\/jats:p>","DOI":"10.1142\/s0218126623500093","type":"journal-article","created":{"date-parts":[[2022,7,9]],"date-time":"2022-07-09T02:19:40Z","timestamp":1657333180000},"source":"Crossref","is-referenced-by-count":2,"title":["A Novel Multi-User Carrier Index Differential Chaos Shift Keying Modulation Scheme"],"prefix":"10.1142","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8882-3081","authenticated-orcid":false,"given":"Hua","family":"Yang","sequence":"first","affiliation":[{"name":"School of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofei","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guoping","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Automation, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ronghua","family":"Luo","sequence":"additional","affiliation":[{"name":"College of Networks and Telecommunications Engineering, Jinling Institute of Technology, Nanjing, Jiangsu 211169, P. R. 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