Software defined automotive radar systems

Patent metadata

Field	Value
Publication number	US-11086010-B2
Application number	US-201816207910-A
Country	US
Kind code	B2
Filing date	Dec 3, 2018
Priority date	Apr 7, 2016
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on one or more of a selected range resolution, a selected velocity resolution, and a selected angle of arrival resolution, as defined by memory requirements and processing requirements. The system allows improved resolution of range, Doppler and/or angle depending on the memory requirements and processing requirements. The system also adapts to changing environmental conditions including interfering radio signals.

First claim

The invention claimed is:

1. A radar sensing system for a vehicle, the radar sensing system comprising:
an adaptable transmitter configured for installation and use on a vehicle, and configured to transmit radio signals;
an adaptable receiver configured for installation and use on the vehicle, and configured to receive radio signals, wherein the received radio signals include transmitted radio signals transmitted by the transmitter and reflected from objects in an environment;
a control unit configured to adaptively control a variable operation of at least one of the transmitter and the receiver in response to changing performance objectives, wherein the performance objectives are defined by environmental conditions and functional requirements, wherein the functional requirements are defined by at least one of processing limitations and memory limitations;
wherein the environmental conditions comprise self-interference when the received radio signals comprise radio signals transmitted by the transmitter and reflected off a bumper of the vehicle, and received by the receiver, and wherein a level of the self-interference is dependent upon an installation location of the transmitter in the vehicle; and
wherein the receiver is adapted to process the received radio signals as controlled by the control unit, and wherein the control unit is configured to select an operational configuration for the receiver, and wherein the selected operational configuration of the receiver is in response to the changing performance objectives.

2. The radar sensing system of claim 1 , wherein the receiver comprises an adaptable digital front end processor and an adaptable digital back end processor, and wherein the control unit is configured to select an operational configuration for the digital front end processor and an operational configuration for the back end processor by selecting the operational configuration for the receiver.

3. The radar sensing system of claim 1 , wherein the environmental conditions are determined by at least one of the radar sensing system itself and external sources, and wherein the external sources include communications received from any one or more of other radar sensing systems, other vehicles, cellular networks, and GPS receiver systems.

4. The radar sensing system of claim 1 , wherein the environmental conditions comprise at least one of urban areas, suburban areas, rural areas, desert areas, parking lots, parking structures or garages, construction zones, and at least one of time of day and weather conditions.

5. The radar sensing system of claim 4 , wherein the control unit reconfigures at least one of the transmitter and the receiver for a performance objective as defined by a current environmental condition, and wherein the performance objective includes at least one of an optimized range resolution, an optimized velocity resolution, an optimized angle-of-arrival resolution, an optimized memory allocation, and an optimized range bin resolution for at least a portion of a plurality of range bins.

6. The radar sensing system of claim 1 , wherein the receiver comprises an analog interference cancellation unit configured to cancel self-interference such that the transmitted signal transmitted by the transmitter and reflected off the bumper of the vehicle is eliminated from the received radio signals, and wherein the control unit is configured to activate the analog interference cancellation unit when the level of the self-interference is above a threshold.

7. The radar sensing system of claim 1 , wherein the environmental conditions comprise interference when the received radio signals comprise interfering radio signals transmitted by another radar sensing system, and wherein the interference is defined by the type of signal transmitted by the another radar sensing system.

8. The radar sensing system of claim 7 , wherein the control unit reconfigures at least one of the transmitter and the receiver to eliminate and/or mitigate the interfering radio signals, and wherein the reconfiguration is defined by the type of signal transmitted by the another radar sensing system.

9. The radar sensing system of claim 1 , wherein the functional requirements comprise at least one of a selected processing time, a memory requirement, a selected range bin resolution, and a selected quantity of range bins.

10. The radar sensing system of claim 9 , wherein the control unit is configured to reconfigure the receiver such that a first selected quantity of range bins comprises a first selected resolution and a second selected quantity of range bins comprises a second selected resolution that is lower than the first selected resolution.

11. The radar sensing system of claim 1 further comprising a memory, wherein data produced by the receiver from the received radio signals is stored in the memory, and wherein the control unit controls the processing of the stored data based upon the selected operation configuration of the receiver.

12. The radar sensing system of claim 11 , wherein the control unit is configured to control an operation of the receiver to process range information from the received radio signals, and wherein the receiver is reconfigured to:
select an object for which a better Doppler estimation is desired;
store multiple time scans corresponding to a range of a desired object; and
perform Doppler processing on extended information from multiple scans to obtain more precise Doppler information.

13. A method for operating a dynamically adaptable vehicular radar sensing system, the method comprising:
providing an adaptable transmitter configured for installation and use on a vehicle;
providing an adaptable receiver configured for installation and use on the vehicle;
providing a memory configured for storing data processed by the receiver;
transmitting, with the transmitter, modulated radio signals;
receiving, with the receiver, radio signals, wherein the received radio signals include at least one of: transmitted radio signals transmitted by the transmitter and reflected from objects in an environment, and radio signals transmitted by another radar sensing system;
adaptively controlling an operation of at least one of the transmitter and the receiver in response to changing performance objectives, wherein the performance objectives are defined by environmental conditions and functional requirements, wherein the functional requirements are defined by at least one of processing limitations and memory limitations;
wherein the environmental conditions comprise self-interference when the received radio signals include radio signals transmitted by the transmitter and reflected off of a bumper of the vehicle, and received by the receiver, and wherein a level of the self-interference is dependent upon an installation location of the transmitter in the vehicle;
processing, with the receiver, the received radio signals as defined by a selected operational configuration for the receiver, and wherein the selected operational configuration of the receiver is in response to the changing performance objectives.

14. The method of claim 13 , wherein the environmental conditions are determined by at least one of the radar sensing system itself and external sources, and wherein the external sources include communications received from any one or more of other radar sensing systems, other vehicles, cellular networks, and GPS receiver systems.

15. The method of claim 13 , wherein the environmental conditions comprise at least one of urban areas, suburban areas, rural areas, desert areas, parking lots, parking structures or garages,

Assignees

• Uhnder Inc

Inventors

• Davis Curtis
• Maher Monier
• Bordes Jean P
• Hegde Manju
• Schmid Otto A
• Rao Raghunath K
• Goldenberg Marius
• Eshraghi Aria
• Giannini Vito
• Trager David S
• Bhagat Nikhilesh
• Gollapudi Srikanth
• Govindarajan Sundar
• Borho Steve
• Preussner Jonathan
• Dent Paul W
• Bassett Paul
• Alland Stephen W
• Harris Fred
• Stark Wayne E
• Ali Murtaza

Classifications

• H04B17/309

  Measuring or estimating channel quality parameters · CPC title

• G01S7/023

  Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36) · CPC title

• G01S7/0233

  Avoidance by phase multiplex · CPC title

• G01S7/0234

  Avoidance by code multiplex · CPC title

• H04L27/2278

  using correlation techniques, e.g. for spread spectrum signals · CPC title