葛利嘉¹,
江治林^1,,,
冯胜¹,
杨勤²
1.重庆邮电大学移动通信技术重庆市重点实验室 ??重庆 ??400065
2.陆军工程大学通信士官学校应急通信重庆市重点实验室 ??重庆 ??400035
基金项目:国家自然科学基金(61271251)；重庆市社会事业与民生保障科技创新专项项目(cstc2017shmsA40002)

详细信息

作者简介:葛利嘉：男，1957年生，教授，研究方向为高速无线传输与信号处理
江治林：男，1993年生，硕士生，研究方向为高速无线传输与索引调制
冯胜：男，1994年生，硕士生，研究方向为高速无线传输与信号处理
杨勤：男，1984年生，讲师，研究方向为高速无线传输与信号处理

通讯作者:江治林　 995489312@qq.com

中图分类号:TN929.5

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出版历程

收稿日期:2018-01-28
修回日期:2018-06-05
网络出版日期:2018-07-30
刊出日期:2018-10-01

Non-orthogonal-code Index Modulation

Lijia GE¹,
Zhilin JIANG^1,,,
Sheng FENG¹,
Qin YANG²
1. Chongqing Key Laboratory of Mobile Communication Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2. Chongqing Key Laboratory of Emergency Communication, Communication NCO Academy of Army Engineering University, Chongqing 400035, China
Funds:The National Natural Science Foundation of China (61271251), The Social Cause and People’s Livelihood Protection Science and Technology Innovation Special Project of Chongqing (cstc2017shmsA40002)


摘要
摘要:针对码索引调制(Code Index Modulation, CIM)相对于直接序列扩频在提升频谱利用率时，造成误比特率性能明显下降的问题，该文提出非正交-码索引调制(Non-orthogonal-Code Index Modulation, N-CIM)。发射端信息比特分割为伪随机(Pseudo Noise, PN)码映射块和调制信息块，并分别映射为PN码的索引和调制符号，调制符号的实部与虚部再选择相同的激活的PN码进行扩频。仿真与分析结果表明，在相同频谱效率时，N-CIM的误比特率性能比CIM在加性高斯白噪声信道中当误比特率为10^–5时具备约2～3 dB的优势，在瑞利衰落信道中当误比特率为10^–2时具备约2 dB的优势。
关键词:直接序列扩频/
非正交/
码索引调制/
误比特率
Abstract:To deal with the problem that the bit error rate reduces obviously when the Code Index Modulation (CIM) is used to improve spectrum utilization, a novel Non-orthogonal-Code Index Modulation (N-CIM) is proposed. The bit stream of the transmitter is divided into mapping block of Pseudo Noise (PN) code and informational block of modulation, which are mapped into the index of the PN code and modulation symbol respectively. The real part and imaginary part of the modulation symbol are spread by selecting the identical activate PN code. Simulation and analysis results show that N-CIM outperforms CIM by about 2~3 dB in additive white Gaussian noise channel when the bit error rate is 10^–5, and N-CIM outperforms CIM by about 2 dB in Rayleigh fading channel when the bit error rate is 10^–2 at the same spectral efficiency.
Key words:Direct Sequence Spread Spectrum (DSSS)/
Non-orthogonal/
Code Index Modulation (CIM)/
Bit Error Rate (BER)



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