| 摘要: |
| 针对按频率均匀划分子信道的数字信道化技术缺乏灵活性、资源利用率低等问题，提出了一种基于信号时间-频率特征分析的自适应信道化技术。对中频数据进行时-频分析，根据信号时-频特征参数差异对子信道进行跟踪、聚类，自适应动态调整参与反变换的子信道，实现宽带复杂调制信号的完整截获、跟踪、分离。仿真分析结果验证了算法的有效性，且其计算复杂度低，可应用于现场可编程逻辑门阵列等工程实现，为复杂电磁环境下的宽带雷达信号侦察提供有力支撑。 |
| 关键词: 宽带数字接收机 数字信道化 时间-频率分析 滑动离散傅里叶变换 |
| DOI： |
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| 基金项目: |
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| An adaptive channelized technology based on time-frequency analysis |
| KUANG Hongyin |
| (Southwest China Institute of Electronic Technology,Chengdu 610036，China) |
| Abstract: |
| To solve the problems of inflexible spectrum topology and low resource utilization in equally divided digital channelization technology,an adaptive channelization technology based on time-frequency characteristic analysis is proposed.To realize interception,tracking and separation on broadband complex modulation signals completely,the involved subchannels are tracked,clustered and dynamically adjusted according to the difference in characteristic parameters obtained from intermediate frequency(IF) signals.Simulations validate the effectiveness and lower computation complexity of the algorithm.The proposed algorithm is suitabled for field programmable gate array(FPGA) implementation,which provides strong support for broadband radar signal detection in complex electromagnetic environment. |
| Key words: digital wideband receiver digital channelization time-frequency analysis sliding discrete Fourier transform |
