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Signal Quality Monitoring (SQM) is about measuring the distortion of a navigation signal due to the payload, without having the measurement polluted by propagation error and noise. The focus is the signal distortions that could cause a tracking error at the user level. A well known example is the Evil Waveform (EWF) that affected GPS SVN-19 in 1993, but there are also smaller scale deformation on...
Aiming at the special space in the tunnel, this paper assumes the geometric distribution of scatterers which is totally different from on the ground, puts forward a new GBSB model of MIMO channel and deduces the space-time correlation function of the model. The results of theoretical analysis and simulation show that the model can more accurately reflect the factors which impact the channel correlation...
Aiming at the special space in the tunnel, this paper assumes the geometric distribution of scatterers which is totally different from on the ground, puts forward a new GBSB model of MIMO channel and deduces the space-time correlation function of the model. The results of theoretical analysis and simulation show that the model can more accurately reflect the factors which impact the channel correlation...
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