Reconfigurable radio frequency front end for a radar system
Examples disclosed herein relate to reconfigurable circuits and systems for a radar system enabling both short-range and long-range operation. A reconfiguration module enables the various configuration changes for operation. The multi-range operation may be used to adjust transmission parameters of other modules including wireless communications.
1. A vehicle system, comprising:
a wireless communication system adapted for high directivity cellular communications, comprising:
a communication module; and
a transmission enhancement module; and
a radar module comprising:
a transceiver;
an antenna module;
a reconfiguration unit coupled to the transceiver and the antenna module, the reconfiguration unit adapted to configure the radar module for multiple ranges of operation, the reconfiguration unit comprising:
an analog antenna controller for analog transmission of radio frequency signals from antenna elements in the antenna module; and
a digital controller to control a power divider network coupled to the antenna elements and distribute power across antenna elements in the antenna module,
wherein the radar module is configured for azimuth and elevation scanning to cover an expanded field of view.
2. A vehicle system as in claim 1 , wherein on detection of an object between the vehicle system and a wireless communication transmitter by the radar module, the transmission enhancement module adjusts transmission parameters of the wireless communication.
3. A vehicle system as in claim 2 , wherein the reconfiguration unit comprises a plurality of switching means to couple the transceiver to the antenna module to accomplish different ranges of operation.
4. A vehicle system as in claim 3 , wherein the reconfiguration unit configures the antenna array for a first range of operation at a first time period with guard band slots and configures the second range of operation during the guard band slots.
5. A vehicle system as in claim 4 , wherein the antenna array has subsets of antenna elements, and the reconfiguration unit configures the antenna array for use of each of the subsets of antenna elements during different range operations.
6. A vehicle system as in claim 5 , further comprising a sensor fusion module coupled to a plurality of sensor modules, wherein on detection of an object in a line of sight between the vehicle system and a base station, the sensor fusion triggers control of the wireless communication system to change transmission parameters of communications.
7. The vehicle system as in claim 1 wherein the radar module is an RF front end system and wherein the antenna module comprises:
a plurality of antenna elements;
a configuration network coupled to the plurality of antenna elements;
an RF module coupled to configuration network;
wherein the configuration network is adapted for multiple range operation.
8. The vehicle system as in claim 7 wherein the configuration network comprises a reconfiguration means for controlling the configuration network.
9. The vehicle system as in claim 8 , wherein the configuration network is a switch network comprising a plurality of switches to reconfigure the RF front end system for multi-range operation.
10. The vehicle system as in claim 9 , wherein the plurality of 16/switches comprise multi-port switches to change connections within the configuration network and the reconfiguration means controls the state of the multi-port switches.
11. The vehicle system as in claim 10 wherein the RF module comprises:
a transmitter coupled to a first set of switches; and
a receiver coupled to a second set of switches.
12. The vehicle system as in claim 11 wherein at least one port of the first set of switches is coupled to at least one port of the second set of switches.
13. The vehicle system as in claim 12 , wherein a first set of elements of the plurality of antenna elements are organized as a first array and the second set of elements of the plurality of antenna elements are organized as a second array.
14. The vehicle system as in claim 13 , wherein the reconfiguration means configures the RF front end system to transmit from the first and second array at a first time and configures the RF front end system to receive from the first and second array at a second time.
15. The vehicle system as in claim 14 , wherein the reconfiguration means controls operation of the first and second arrays for a first transmission range and a second transmission range by time division duplexing scheme.
16. The vehicle system as in claim 15 , wherein the time duplexing scheme applies a guard band for the first transmission range, and wherein transmission for the second transmission range are transmitted during the guard band.
17. The vehicle system as in claim 16 , wherein the antenna module is an antenna array comprising:
a receiver to receive radar signals;
a first antenna element array;
a transmitter to generate radar signals;
a second antenna element array;
at least one power divider and combiner network coupled to each of the first and second antenna element arrays; and
a reconfiguration module coupled to the at least one power divider and combiner network and adapted to reconfigure reception and transmission paths through the radar system.
18. The vehicle system as in claim 17 , wherein the reconfiguration module is adapted to couple the first antenna element array and the second antenna element array to the transmitter.
19. The vehicle system as in claim 18 , wherein the reconfiguration module is adapted to couple the first antenna element array and the second antenna element array to the receiver.
20. The vehicle system as in claim 19 , wherein the reconfiguration module is adapted to couple the first antenna element array to the transmitter and the second antenna element array to the receiver.