《计算机应用研究》|Application Research of Computers

一种多带多chirp基调制解调技术

Technique of modulation and demodulation based on multi-carrier and multi chirp-basis

免费全文下载 (已被下载 次)  
获取PDF全文
作者 肖绵合,郑霖,杨超
机构 桂林电子科技大学 广西无线宽带通信与信号处理重点实验室,广西 桂林 541004
统计 摘要被查看 次,已被下载
文章编号 1001-3695(2019)07-046-2130-04
DOI 10.19734/j.issn.1001-3695.2018.02.0108
摘要 多带线性调频二进制开关键控(chirp-BOK)调制是在线性调频(chirp)信号基础上合成的,其传统的检测方案匹配滤波法存在非相关项自干扰问题,在子带个数较多或chirp基的时带宽积较小情况下误码性能较差。建立了一种多带chirp信号的数学模型并提出一种简易的调制流程。基于该模型,采用最小二乘法解决了匹配滤波法自干扰问题,相比于匹配滤波法具有较好的信干噪比增益。更进一步地,通过分析多带chirp-BOK技术缺陷提出一种多带多chirp基调制技术(MMCM)。MMCM技术可以灵活地调整码率与扩频增益之间的关系。仿真表明,扩频增益为0 dB情况下,MMCM与OFDM技术有相同频带利用率;对于MMCM的信源组个数为<i>J</i>与时带宽积为P的情况,系统处理增益为<i>P</i>/<i>J</i>。
关键词 多带chirp-BOK; MMCM技术; 线性调频基
基金项目 国家自然科学基金资助项目(61571143,61371107)
通信网信息传输与分发技术重点实验室开放课题(KX172600033)
本文URL http://www.arocmag.com/article/01-2019-07-046.html
英文标题 Technique of modulation and demodulation based on multi-carrier and multi chirp-basis
作者英文名 Xiao Mianhe, Zheng Lin, Yang Chao
机构英文名 Key Laboratory of Wideband Wireless Communications & Signal Processing,Guilin University of Electronic Science & Technology,Guilin Guangxi 541004,China
英文摘要 The multi-band chirp-BOK modulation is based on chirp signal, which has problem of non-related items self-interference in traditional detection scheme which is matching filtering method(MF). The MF has lower bit error rate performance in the case of a larger number of sub-bands or smaller chirp-based bandwidth. This paper established a mathematical model with multi-band chirp signals and proposed a simple modulation workflow based on the model, it could use the least square(LS) method to solve the self-interference problem of matched filter. LS method could provide a better SNR gain compared with the MF. Further, it proposed a multi-band multi-chirp-based modulation technique(MMCM) by analyzing the multi-band chirp-BOK technique. MMCM technology could flexibly adjust the relationship between code rate and spread-spectrum gain. MMCM had the same frequency band utilization as OFDM technology with spread spectrum gain of 0 dB. For the case that the number of source groups of MMCM is <i>J</i> and the time-bandwidth product is <i>P</i>, the system processing gain is <i>P</i>/<i>J</i>.
英文关键词 multi-band chirp-BOK; MMCM; chirp-based
参考文献 查看稿件参考文献
 
收稿日期 2018/2/6
修回日期 2018/3/26
页码 2130-2133
中图分类号 TN928
文献标志码 A