雷达测量基础知识

Table of ContentsChapter I IntroducTIon    .1Radar Measurement Tasks Through the lifecycle of a radar system     .1Challenges of Radar Design & VerificaTIon     .1Challenges of ProducTIon TesTIng    2Signal Monitoring       2Basic RF Pulsed Radar Signals      .2Compressed Pulse signal types and purposes   .3Linear FM Chirps       3Frequency Hopping      .3Phase Modulation       .4Digital Modulation       4Radar Pulse Creation      .4Transmitter Tests       4Receiver Tests      .4Chapter II Pulse Generation – Baseband andRF Modulated Pulses     .5Overview        .5Baseband Pulse Generation     .5Pulse Modulated RF       .6RF Pulses Directly from an Arbitrary Waveform Generator  .6Synthesizing Signals Directly in the AWG Serieswith RFXpress¤      .7The Carrier Parameters     .7Adding Impairments    .7Adding Interference     .7Pulse Envelope Parameters      .8The Staggered PRI Tab     .8Adding Timing Impairments      .8Complex Modulations within the Pulse     .9Graphing the Results    .9Creating MATLAB® Signals and Importing into theAWG Series      9Checking the Phase Modulation     .9Chapter III Pulse Measurements Methods   .10Overview       .10Automated RF Pulse Measurements    12Short Frame Measurements — The Pulse Model   .12Sampling the RF       .12Choosing Measurement Parameters    .12Measurement Filter Type      13Detection Threshold and Minimum OFF Time   .13Maximum Number of Pulses to Measure   14Frequency Estimation Method    .14Measurement Point Definitions   .14Droop Compensation and Rise/Fall Definitions  .1550% Level Definitions     .15Finding the Pulse       .15Minimum Pulse Width for Detection     15Using the Threshold Setting    16Finding the Pulse Carrier Amplitude   .17Method One: Magnitude Histogram    .18Method Tw Local Statistics    20Method Three: Moving Average   .20Noise Histogram (preparation for method four)   .21Method Four: Least Squares Carrier Fit  .21Locating the Pulse Cardinal Points    23Interpolation      .24Estimating the Carrier Frequency   .24Constant Phase      .24Changing Phase     25Linear Chirp     .25Making the Timing Measurements   .26Rise Time/Fall Time    .26Measurement System Impact onRise and Fall times     .26Pulse Width     .28Repetition Interval/Duty Cycle    .28Peak Amplitude      .28Average ON Power    .28Average Transmit Power      28Droop      .29Pulse Top Ripple     29