On-Board PN Ranging Acquisition Based on Threshold Comparison with Soft-Quantized Correlators
Pseudonoise (PN) regenerative ranging on-board acquisition performance is assessed in terms of the acquisition time for a given probability of acquisition at a reference signal-to-noise ratio (SNR). So far the detection of the correct ranging code phase alignment has been analyzed by a maximum likel...
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Veröffentlicht in: | IEEE transactions on aerospace and electronic systems 2012-01, Vol.48 (1), p.869-890 |
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Sprache: | eng |
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Zusammenfassung: | Pseudonoise (PN) regenerative ranging on-board acquisition performance is assessed in terms of the acquisition time for a given probability of acquisition at a reference signal-to-noise ratio (SNR). So far the detection of the correct ranging code phase alignment has been analyzed by a maximum likelihood (ML) estimation with no amplitude quantization at the chip matched filter output. Despite its optimality in an additive white Gaussian noise (AWGN) channel, an ML estimation finds a maximum value also when no ranging signal (i.e., noise-only) is present at the receiver input thus resulting in a false alarm (FA) detection. On the contrary a suboptimum threshold comparison estimation of the correct ranging code phase alignment can overcome such a hindrance. This work reports the on-board PN regenerative ranging acquisition performance based on threshold comparison with 3-bits soft-quantized correlators along with the relevant trade-offs with respect to the ML estimation. |
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ISSN: | 0018-9251 1557-9603 |
DOI: | 10.1109/TAES.2012.6129675 |