电子信息对抗技术
電子信息對抗技術
전자신식대항기술
ELECTRONIC INFORMATION WARFARE TECHNOLOGY
2014年
5期
25-31
,共7页
欠采样%解模糊%调制斜率%初始频率%多采样率%余数定理
欠採樣%解模糊%調製斜率%初始頻率%多採樣率%餘數定理
흠채양%해모호%조제사솔%초시빈솔%다채양솔%여수정리
sub-sampling%solving ambiguity%chirp rate%initial frequency%multi-sampling rate%remainder theorem
基于余数定理解频率模糊和解线调方法，提出一种在低速采样条件下针对宽带线性调频实信号的参数估计算法。单路欠采样信号与其延迟信号共轭相乘，根据输出信号的单频特性利用谱峰检测进行调制斜率的无模糊估计。通过合成无载波的线性调频信号对三路欠采样信号解线调处理，运用余数定理进行初始频率的无模糊估计。该算法稳定性好，精度高，易于在硬件上实现，具有实用价值。
基于餘數定理解頻率模糊和解線調方法，提齣一種在低速採樣條件下針對寬帶線性調頻實信號的參數估計算法。單路欠採樣信號與其延遲信號共軛相乘，根據輸齣信號的單頻特性利用譜峰檢測進行調製斜率的無模糊估計。通過閤成無載波的線性調頻信號對三路欠採樣信號解線調處理，運用餘數定理進行初始頻率的無模糊估計。該算法穩定性好，精度高，易于在硬件上實現，具有實用價值。
기우여수정리해빈솔모호화해선조방법，제출일충재저속채양조건하침대관대선성조빈실신호적삼수고계산법。단로흠채양신호여기연지신호공액상승，근거수출신호적단빈특성이용보봉검측진행조제사솔적무모호고계。통과합성무재파적선성조빈신호대삼로흠채양신호해선조처리，운용여수정리진행초시빈솔적무모호고계。해산법은정성호，정도고，역우재경건상실현，구유실용개치。
Based on the remainder theorem and direct dechirp operation, the algorithm for pa-rameters estimation of the sub-sampling wideband LFM real signal is presented. Since the con-jugation multiplication product of the single sub-sampling signal and its different delay is single tone , the chirp rate is estimated unambiguously by spectrum peak search detection. Then the di-rect dechirp operations are finished by the digital synthesis chirp signal without carrier for three difference sub-sampling signals, and the initial frequency can be estimated unambiguously by the remainder theorem. The algorithm is realized with good stability and high precision, and is simple enough to be easily realized in the hardware. So it is of some practical value.
