| 摘要: |
| 由于L波段功能信号覆盖频段宽而瞬时带宽窄的固有特征，传统窄带数字波束形成（Digital Beamforming，DBF）及时域宽带波束形成在基于现场可编程门阵列（Field Programmable Gate Array，FPGA）的硬件实现中，普遍存在乘法器资源消耗过高的问题，严重制约了多功能信号接收系统的集成度与工程实用性。为此，提出了一种宽带信道化、数字波束形成与数字下变频（Digital Down Converter，DDC）级联的波束形成算法。该算法通过功能模块的合理级联与协同设计，可高效实现L波段内雷达、自动相关监视-广播（Automatic Dependent Surveillance-Broadcast，ADS-B）及Link16信号的一体化侦察与DBF接收。实验结果表明，与传统实现方法相比，所提级联算法在FPGA平台上的乘法器资源开销降低60%以上。 |
| 关键词: L波段射频系统 多功能综合化 宽带信道化 数字波束形成（DBF） 级联与协同设计 |
| DOI：10.20079/j.issn.1001-893x.250410004 |
|
| 基金项目: |
|
| L-band Multifunctional Integrated DBF Receiving Technology |
| LI Mingbing |
| (National Key Laboratory of Complex Aviation Simulation System，Chengdu 610036，China) |
| Abstract: |
| Due to the inherent characteristics of L-band functional signals，i.e., wide coverage frequency band but a narrow instantaneous bandwidth，the traditional narrowband digital beamforming(DBF) and time-domain wideband beam forming generally suffer from the problem of excessive multiplier resource consumption in their hardware implementation based on field programmable gate arrays(FPGAs).This issue seriously restricts the integration level and engineering practicality of multifunctional signal receiving systems.To address this，the author proposes a beamforming algorithm that cascades wideband channelization，digital beamforming，and digital down converter(DDC).Through the rational cascading and collaborative design of functional modules，this algorithm can efficiently realize the integrated reconnaissance and DBF reception of radar，automatic dependent surveillance-broadcast(ADS-B)，and Link16 signals within the L-band.Experimental results show that compared with traditional implementation methods，the proposed cascaded algorithm reduces the multiplier resource overhead by more than 60% on the FPGA platform. |
| Key words: L-band RF system multi-functional integration wideband channelization digital beamforming(DBF) cascading and collaborative design |
《电讯技术》编辑部 