TABLE 1
Simulation Parameters
| Parameters | Values |
|---|---|
| Signal type | BPSK(1) |
| Spreading code type | PRN 1 of GPS L1 C/A |
| Sampling rate | 20.46 MHz |
| Intermediate frequency | 10 MHz |
| S-LCI interval Tt | 1.024 s |
| Slow-time interval TS | 0.25 ms |
| Input C/N0 | 15 dB-Hz to 45 dB-Hz |
| Input Doppler rate | 0–2 g |
| Input initial frequency error Δf | 5+ εf Hz |
| Input initial carrier phase error Δϕc | 0 cycle |
| Input code phase error Δτb,c | 0 chip |
| FRFT order search step Δpo | 0.00055 |
| FRFT order search range | pε – 2Δpo to pε+ 2Δpo with pε= p + Δp |
| Monte Carlo experiments of each case | 100 trials |
| Iteration number of estimates each trial | 20 times |
| Small-large rotation angle spacing | πΔ po radians |
| Early-late code phase spacing | 0.5 chips |
| Low-high frequency spacing |  |
Notes:
1 For
where the probability density function (PDF) of εf satisfies geometric distribution.2 For
where εp satisfies geometric distribution.3 p corresponds to the truth value of the input Doppler rate.
