Generic CDO-Based SQM Algorithms for Dual-Frequency Civilian Signals
| ITEMS | CONFIGURATIONS | ||||
|---|---|---|---|---|---|
| Name | SCSQM8r | ||||
| Carrier frequency | L1/B1 | L5/B2 | |||
| Correlator | Observable | CDO | |||
| Location (chips) | Baseline | ±1/80, ±3/80, ±5/80, ±7/80 | ±1/8, ±3/8, ±5/8, ±7/8 | ||
| Simplified | −1/80, +1/80, +3/80, +5/80, +7/80 | −1/8, +1/8, +3/8, +5/8, +7/8 | |||
| Integration period(seconds) | 1 | ||||
| Detection metrics | Baseline | 8 | |||
| Simplified | 5 | ||||
| Metric-smoothing | Period (seconds) | 100 | — | ||
| Improvement factor | 1.5 – 2.3 | ||||
| Signal | GPS L1 C/A | BDS B1C MEO | BDS B2a MEO | ||
| Theoretical minimum receiving C/N0 (dB-Hz) | 39 | 37.5 | 39.3 | ||
| Sampling frequency (MHz) | ≥33 | ||||
| Reference-smoothing stations | SIF = 1.5 | ⌈(0.0199 · FS + 0.0176)−2⌉ ⌈(0.0151 · FS+0.0055)−2⌉ | — | ||
| SIF = 2.3 | ⌈(0.0306 · FS + 0.0270)−2⌉ ⌈(0.0231 · FS + 0.0084)−2⌉ | ||||
| Probability of false-alert | 1.5 ×10−7 per test | ||||
| Probability of miss-detection | 1 ×10−3 per test | ||||
| MERR (meters) | 1.61 | 2.89 | |||