A Dual-Hierarchy Synchronization Method for Signal Preambles with High Detection Rates for Satellite-Based ADS-B Receivers with Different Sensitivities

Table 1

Boldly contrasting our contributions to the relevant literatures.

Challenges	[10]	[12]	[13]	[14]	Our work
SNR range for effective working^① (dB)	≥4.5	≥10		≥0.4	≥0.4	Framework
Operating scenario of satellite-based ADS-B^②
High detection rates				✓	✓	Step 1
Acceptable false alarm rates		✓			✓	Step 2
Sampling frequency (MHz)	10	18	12.5	105	10	Framework
Fewer on-star resources consumed	✓	✓	✓		✓	Step 3
High robustness^③					✓	Step 2
Strong applicability^④					✓	Step 1

The ① shows that the method can achieve the basic requirement of 90% detection rate within this SNR range, where the SNR has been converted via (4) in Section 2.1. The ② describes a scenario which the sensitivity of the satellite-based receiver is as low as -102 dBm. Performance ③ represents whether the method can process signals with different dynamic ranges. Performance ④ indicates that the method can also be used for ADS-B receivers with different sensitivities. The last column shows the contributions of our work and the key ways in which they are being realized.