Abstract
Stepped-frequency radar has the ability of high range resolution (HRR). It normally adopts frequency-time transformation (IDFT) processing to get the range profile of targets. Alternatively stepped-frequency radar can also use time-frequency transformation (DFT) processing, with which it is seen as a kind of pulsed-doppler (PD) radars that use stepped-frequency pulses. Through parametric design and signal processing methods of the radar system, DFT method can achieve both unambiguous velocity and high resolution ranging in a single dwell under HPRF circumstances. The range ambiguity problem in HPRF PD radars can be resolved by careful design of parameters and signal processing methods. This paper analyzes the time-frequency transformation processing of stepped-frequency radars, based on which the HPRF PD stepped-frequency radar system's parameter design principle, solutions to the frequency-time coupling issue and range ambiguity are also given. Both theoretical analysis and simulation result prove that this radar scheme can simultaneously achieve unambiguous velocity and high resolution ranging.
| Original language | English |
|---|---|
| Pages (from-to) | 1630-1636 |
| Number of pages | 7 |
| Journal | Tien Tzu Hsueh Pao/Acta Electronica Sinica |
| Volume | 35 |
| Issue number | 9 |
| Publication status | Published - Sept 2007 |
Keywords
- Ambiguity resolution
- Radar
- Stepped frequency
- Time-frequency transformation
- Waveform analysis