In time difference of arrival (TDOA)/frequency difference of arrival (FDOA) passive location systems used in micro/ nano-satellite formations, improving the location accuracy usually requires a large increase in data transmissions, which severely reduces the system efficiency due to the narrow data link bandwidth of the satellites. A TDOA/FDOA estimation method is developed based on sub-sampling transmissions without increasing the data transmissions, which significantly improves the FDOA accuracy by a time expansion while maintaining the TDOA estimation accuracy. The TDOA accuracy is analyzed and the maximum sub-sampling rate is derived. Simulations show that for wideband signals, the location accuracy of this method is improved more than 6 fold over that of the compressed sensing method for the same data transmission.
LI Zhenqiang
,
HUANG Zhen
,
CHEN Xi
,
GE Ning
. Passive location method based on sub-sampling transmissions in micro/nano-satellite[J]. Journal of Tsinghua University(Science and Technology), 2016
, 56(6)
: 650
-655
.
DOI: 10.16511/j.cnki.qhdxxb.2016.22.027
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