摘要
由于传统基带IJF编码波形存在大约3dB的包络起伏现象,直接影响调制信号的性能。通过对IJF信号码型的形成原理进行分析,对基带脉冲形式进行了适当的加权处理,提出了一种性能优越、幅度起伏较小的IJF码型。经理论分析和大量仿真实验表明,该IJF编码具有频谱较窄、滚降速度较快且相位路径连续、平缓等优点,从而能在很大程度上提高调制信号的性能。
Since there exists about 3dB envelope fluctuation phenomenon in the traditional base band IJF coding,this disadvantage will directly affect the performances of modulation.An IJF coding type with better performance and smaller margin fluctuation is proposed in this paper.It is obtained through analyzing the generating principle of IJF signal coding type and weighting the base band pulse appropriately.Theory analysis and a large number of simulations prove that the IJF coding woks better which has narrow spectrum,higher rolling speed,continuous and gentle phase path,etc.greatly improving the performance of signal modulation.
出处
《南昌航空大学学报（自然科学版）》
CAS
2012年第1期80-84,共5页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
航空科技支撑基金(05C56001)
关键词
IJF
包络起伏
仿真
IJF
envelope fluctuation
simulation
