US 12,019,144 B2
Frequency division multiplexing with polyphase shifters
Zhengzheng Li, Agoura Hills, CA (US); and Christopher D. Gianelli, Michigan City, IN (US)
Assigned to Aptiv Technologies AG, Schaffhausen (CH)
Filed by Aptiv Technologies AG, Schaffhausen (CH)
Filed on Jul. 23, 2021, as Appl. No. 17/383,573.
Claims priority of provisional application 63/156,480, filed on Mar. 4, 2021.
Prior Publication US 2022/0283284 A1, Sep. 8, 2022
Int. Cl. G01S 13/58 (2006.01); G01S 13/931 (2020.01); H04J 1/02 (2006.01)
CPC G01S 13/58 (2013.01) [G01S 13/931 (2013.01); H04J 1/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A radar system comprising:
multiple transmitters configured to transmit electromagnetic (EM) signals in a frequency-division multiplexing (FDM) scheme, the multiple transmitters comprising a first number of transmitters;
multiple receivers configured to receive EM signals reflected by one or more objects, the multiple receivers further comprising a second number of receivers, the second number being equal or not equal to the first number;
multiple polyphase shifters operably connected to the multiple transmitters, the multiple receivers, or a combination thereof, the multiple polyphase shifters configured to introduce at least three potential non-zero phase shifts, the multiple polyphase shifters comprise a third number of polyphase shifters, the third number being equal to the first number, the second number, or a sum of the first number and the second number; and
a processor configured to control the multiple polyphase shifters to introduce at least three non-zero phase shifts to at least three of the transmitted EM signals or the received EM signals, the received EM signals comprise a fourth number of channels, the fourth number being equal to a product of the first number and the second number.