| 摘要: |
| 自适应谱线增强（ALE）算法能够提高高动态、低信噪比信号的
载波频率估计精度。针对实际应用中该算法消耗硬件资源多、结构复杂、使用效率低等问题
，提出了结合可编程逻辑门阵列（FPGA）优化的ALE算法结构方法，简化了ALE硬件电路。设
计结果表明，改进ALE方法后，可实现信噪比为0～20 dBHz、最大多普勒动态为800 H
z/s的测控信号载波频率准确估计。 |
| 关键词: 测控通信 信号载波捕获 频率估计 自适应谱线增强 低信噪
比 高动态 |
| DOI： |
|
| 基金项目: |
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| Optimization design and implementation of adaptive line enhancers |
| XU Cheng-jie |
| () |
| Abstract: |
| The arithmetic of adaptive line enhancers (ALE) can improve carrier frequency es
timation accuracy of high dynamic signal with very low signal to noise ratio(SNR
). However, the ALE structure is complex, and hardware resource is extensively c
onsumed.To solve above problems, an optimized methed is proposed based on large
-scale field programmable gate array(FPGA),which simplifies ALE circuits.It is p
roved that by the improved method, the carrier frequency of tracking telemetry a
nd command (TT&C)signal can be accurately estimated under the condition of signa
l to noise power spectrum density ratio 0～20 dBHz and dynamic doppler rate
800 Hz/s. |
| Key words: TT&C;signal carrier capture frequency estimation ALE low SNR high dynamic |
