关键词: 混合跳扩频, 双向多路, DDS, 快跳频载波, FPGA

Abstract: The quality of the frequency hopping carrier in the hybrid hopping spread-spectrum system is determined by hopping speed and bandwidth, which has a direct impact on the performance of the system. For the hybrid hopping spread-spectrum system with a hopping speed of tens of thousands of hops per second and a hopping bandwidth of hundreds of megabytes, the traditional unidirectional frequency-hopping design will occupy a large number of hardware resources and affect the design of other parts of the system. To solve this problem, this paper proposes a bidirectional multi-channel structure of fast frequency hopping carrier generation method, through parallel multi-channel DDS to generate high hops and large bandwidth fast frequency hopping carrier. Using the idea of bidirectional frequency hopping, the consumption of hardware resources is reduced under the condition of constant frequency hopping bandwidth. The experimental results show that based on the FPGA platform, the method successfully generates a fast frequency hopping carrier with a hopping speed of 20 000 hops/s, a frequency hopping bandwidth- DOI:10.3969/j.issn.1000-1565.2021.01.015双向多路快跳频载波发生器的设计与实现 陈雷^1,2,王涛¹,韦靖¹,田晓燕¹,张锁良¹ (1.河北大学 电子信息工程学院,河北 保定 071002; 2.北京邮电大学 电子工程学院,北京 100876)摘 要:混合跳扩频系统中跳频载波的质量主要由跳速、带宽决定,对系统的性能有着直接影响.对于跳速每秒钟几万跳、跳频带宽几百兆的混合跳扩频系统,利用传统单向跳频的方法进行设计时,会占用大量的硬件资源,影响系统其他部分设计.针对此问题,本文提出一种双向多路快跳频载波产生方法,通过多路并行直接频率合成器技术(direct digital synthesizer,DDS)产生高跳速、大带宽的快跳频载波,利用双向跳频的思路,在跳频带宽不变的条件下,降低了硬件资源的消耗.实验结果表明,利用该方法,基于现场可编程门阵列(FPGA,field programmable gate array)平台,实现了跳速20 000 hops/s、跳频带宽327.52 MHz的快跳频载波.相比于单向跳频技术,节约了系统53%的Block RAM资源.关键词:混合跳扩频;双向多路;DDS;快跳频载波;FPGA中图分类号:TN927.2 文献标志码:A 文章编号:1000-1565(2021)01-0099-07 Design and implementation of bilateral multi-channel fast frequency hopping carrier generatorCHEN Lei^1,2, WANG Tao¹, WEI Jing¹, TIAN Xiaoyan¹, ZHANG Suoliang¹(1.College of Electronic Information Engineering,Hebei University,Baoding 071002,China; 2. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)Abstract: The quality of the frequency hopping carrier in the hybrid hopping spread-spectrum system is determined by hopping speed and bandwidth, which has a direct impact on the performance of the system. For the hybrid hopping spread-spectrum system with a hopping speed of tens of thousands of hops per second and a hopping bandwidth of hundreds of megabytes, the traditional unidirectional frequency-hopping design will occupy a large number of hardware resources and affect the design of other parts of the system. To solve this problem, this paper proposes a bidirectional multi-channel structure of fast frequency hopping carrier generation method, through parallel multi-channel DDS to generate high hops and large bandwidth fast frequency hopping carrier. Using the idea of bidirectional frequency hopping, the consumption of hardware resources is reduced under the condition of constant frequency hopping bandwidth. The experimental results show that based on the FPGA platform, the method successfully generates a fast frequency hopping carrier with a hopping speed of 20 000 hops/s, a frequency hopping bandwidth- 收稿日期:2020-08-27 基金项目:国家自然科学基金重点项目(61531007) 第一作者:陈雷(1978—),男,河北保定人,河北大学讲师,北京邮电大学在读博士,主要从事无线通信物理层关键技术研究. E-mail:clei1978@126.com 通信作者:张锁良(1966—),男,河北藁城人,河北大学教授,主要从事高速数据通信研究.E-mail:zhangsl@hbu.cn第1期陈雷等:双向多路快跳频载波发生器的设计与实现of 327.52MHz. Compared with the unidirectional frequency hopping technology, the Block RAM resources are saved by 53%.

Key words: hybrid hopping spread spectrum, bidirectional multi-channel, DDS, fast frequency hopping carrier, FPGA(field programmable gate array)