phase n. 1.形势,局面,状态;阶级。 2.方面,侧面。 3.【天文学】(月等的)变相,盈亏;【物、天】相,周相,相位。 4.【动物;动物学】型,期。 a youthful phase 青年时期。 The problem has many phases. 这问题是多方面的。 phase distortion 【物理学】相畸变,周相畸变。 enter (up)on a new phase 进入一新的阶段。 from phase to phase during this stage 这一阶段中的各个时期。 in phase 【物理学】相同的[地];同时协调的[地]。 out of phase 【物理学】异相的[地],不同相;非同时协调的[地]。 vt. 1.使调整相位,使定相。 2.使分阶段[按计划]进行。 phase in 分阶段引入,逐步采用。 phase out 1. 使逐步结束;使逐步撤出;逐步淘汰;逐部停止(活动等)。 2. (动作等的)逐步停止;逐步撤出。 3. 逐步转入 (into)。
This dissertation mainly studies the pulse compression waveform designing and signal processing , including the following aspects : firstly , by the pulse compression basic theory , the linear frequency modulation signal ( lfm ) , binary phase - coded signal ( bc ) and stepped - frequency ( sf ) signal are discussed respectively including the ambiguity function , pulse compression and spectrum characteristic 本文主要进行脉冲压缩雷达波形设计以及信号处理方面的研究,主要体现在以下几个方面:首先,从脉冲压缩基本理论出发,分别给出了线性调频、二相编码和频率步进信号的模糊函数、脉冲压缩以及频谱特性,对多普勒性能进行了简要分析。
A high - resolution method for frequency measurement is strongly introduced in the paper , which is aim at detecting the frequency of regular and binary phase coding modulated pulse signals with high frequency precision . considering the popularity of linear frequency modulated ( lfm ) signal in electronic systems , this paper then referred a radon - stft arithmetic to calculate the carry frequency of lfm signal . both of these methods referred above are implemented in the signal if detection software 针对常规脉冲调制信号和脉内二相编码调制信号,本文提出一种高精度的数字化测频方法,以提高信号载频测量精度;线性调频信号作为一种典型的非平稳信号在各种领域应用十分广泛,但对其载频的数字化测量比较困难,本文利用图像处理中的radon变换与信号时频分析中的线性变换相结合的算法来完成对其载频的测量。
A full - digital demodulation technique is introduced in this paper , which can make it easy and quick to design and achieve binary phase shift keying ( bpsk ) demodulator , and also can reduce the requirement of the oscillator frequency precision and the degree of stability of the receiver 本文介绍了一种适合于用数字信号处理器( dsp )实现的全数字解调技术。该技术能方便、灵活地设计实现二进制相移键控( bpsk )解调器,而且使用该技术可以大大降低对接收机本身的振荡频率精度和稳定度的要求。