CPC G01S 7/288 (2013.01) [G01S 7/292 (2013.01); G01S 13/003 (2013.01); G01S 7/2883 (2021.05)] | 19 Claims |
1. A radar system comprising:
at least one radio receiver comprising:
an antenna configured to receive RF data including both the direct-path RF signal transmitted from a radio transmitter and a reflected RF signal when the transmitted RF signal is reflected from a target;
a memory configured to store the predetermined RF waveform profile data used by the radio transmitter to generate and transmit the RF signal;
a timing unit to provide timing;
a matched filter application configured to generate and apply a matched filter for identifying RF signal signatures in RF data; and
one or more processors configured to:
(i) analyze the received RF data to identify multiple, repeated, individual RF signals corresponding to the direct-path transmitted RF signal;
(ii) split the identified RF signals corresponding to the direct-path transmitted RF signal into a plurality of repeating units each having an interval time;
(iii) create a matched filter using the stored predetermined transmit waveform profile data in the memory and apply the matched filter to each of repeating units to provide (a) a plurality of direct-path transmitted RF signal arrival times; and (b) a plurality of reflected RF signal arrival times;
(iv) adjust relative arrival times and phases of the repeating units of the direct-path transmitted RF signal in which the one or more processors are configured to:
(1) determine the time and phase within the first repeating unit of the first arrival of the direct-path transmitted RF signal;
(2) set the time and phase for the determined first arrival time as a reference time and phase, respectively; and
(3) adjust the times and phases of the first arrivals of the identified direct-path transmitted RF signal and reflected RF signal within each of the remaining repeating units so that the direct-path transmitted signal matches the reference time and phase; and
(v) generate radar data from the reflected RF signal further using the adjusted times and phases for arrival times of the repeating units of the direct-path transmitted RF signal.
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