SAW 15位m序列相位編碼信號的最小峰值旁瓣濾波器
SAW MINIMUM PEAK SIDELOBE FILTER FOR 15bit m-SEQUENCE PHASE CODED WAVEFORM
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摘要: 本文介紹用線性規(guī)劃方法求解[4,3,0]反饋連接的、起始狀態(tài)為1001的15位m序列相位編碼信號的最小峰值旁瓣濾波器(LP濾波器)的計(jì)算結(jié)果。長度為15的LP濾波器的峰值旁瓣電平降到－21.47dB,比匹配濾波器改善7.49dB,當(dāng)濾波器的長度增加時(shí),LP濾波器可把峰值旁瓣抑制到更低電平。并介紹用聲表面波(SAW)技術(shù)制作15位m序列相位編碼信號(起始狀態(tài)為1001)的LP濾波器,實(shí)驗(yàn)結(jié)果,其峰值旁瓣電平為－19dB,與理論值相差2.47dB。
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關(guān)鍵詞:
- 最小峰值旁瓣濾波器; 脈沖壓縮; 聲表面波; 相位編碼信號
Abstract: This paper presents the computation results of the minimum peak sidelobe filter (LP filter) for the 15bit m-sequence phase coded waveform with feedback connection [4, 3, 0] and initial condition 1001. The design of the filter resorts to linear programming method. The peak sidelobe level of LP filter of length 15 is reduced to －21.47 dB, and is 7.49 dB lower than that of matched filter. The LP filter can suppress the peak sidelobe even more as increasing its length. The minimum peak sidelobe filter for 15 bit m-sequence phase coded waveform (initial condition 1001) has been implemented with surface acoustic wave (SAW) device. experiments show that the peak sidelobe level of the manufactured filter is －19dB and thus differs from the theoretical value (－21.47 dB) by 2.47 dB. -
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