Patent ID: 11927689
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A system, comprising:
a shift register of target detection circuitry, the shift register configured to store data samples of a return target detection signal, wherein the shift register includes a cell under test (CUT), a left guard cell left of the CUT, a right guard cell right of the CUT, a left window left of the left guard cell, and a right window right of the right guard cell;
a rank determining circuit, including a first set of comparators configured to compare a first incoming data samples entering the left window with data samples in the left window, each of the comparators of the first set of comparators having an input configured to receive the first incoming data sample, and a second set of comparators configured to compare a second incoming data sample exiting the right guard cell and entering the right window with data samples in the right window, each of the comparators of the second set of comparators having an input configured to receive the second incoming data sample, the rank determining circuit configured to compute ranks of the first and second incoming data samples;
a sorted index array configured to store a rank of the each of the data samples in the shift register;
a selector configured to select a Kth ranked data sample from the shift register; and
a target comparator having a comparator output and first and second comparator inputs, wherein the first comparator input receives a data sample from the CUT and the second comparator input receives the Kth ranked data sample, and the comparator output indicates a CFAR target detection.