Luo X.,China Electronics Technology Group Corporation |
Luo X.,Hebei Satellite Navigation Technology and Equipment Engineer Technology Center |
Wang Y.,China Electronics Technology Group Corporation |
Wang Y.,Hebei Satellite Navigation Technology and Equipment Engineer Technology Center |
And 2 more authors.
Gaojishu Tongxin/Chinese High Technology Letters | Year: 2011
To monitor non-cooperative navigation signals, the paper studies the estimation of the signals' parameters like Doppler frequency, symbol rate, code period, power and code structure. Based on the description of the global navigation satellite system (GNSS) model and GNSS monitoring structure, the method for blind detection of non-cooperative navigation signals and blind estimation of the above-mentioned parameters is proposed as below. The cyclostationary characteristic of navigation signals is used to estimate the signal power, the symbol rate and the Doppler frequency. The code period is measured based on the autocorrelation function of periodic signals. The slippage correlation method and the data accumulation method are used to decode the code structure. A simulation example illustrates the effectiveness of the approach.