Abstract
The problems net in high dynamic environment during direct spread spectrum system measuring pseudo-random (PN) code delay are analyzed, and the effect of Doppler frequency shifted on PN code delay is studied emphatically. Carrier phase and frequency of high dynamic direct spread spectrum signal are estimated through extended Kalman filter (EKF) algorithm. The PN delay loop is adjusted through measuring the varied value of carrier phase with carrier aiding technology. The effect of Doppler shift on PN code delay is reduced through carrier aiding technology. The precise delay estimation is obtained. The dynamic tracking performance of the PN delay loop is improved.
| Translated title of the contribution | Precise estimation method of pseudo-random code delay of spread spectrum system in high dynamic environment |
|---|---|
| Original language | Chinese (Simplified) |
| Pages (from-to) | 129-132 |
| Journal | 北京航空航天大学学报 |
| Volume | 26 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 2000 |
| Externally published | Yes |
Research Keywords
- 锁相环
- 伪随机码
- 估计
- 载波辅助
- 高动态环境
- 伪码延时
- phase-locked loops
- pseudorandom codes
- estimations
- carrier aiding
- high dynamic environment
- PN code delay
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