Radar system

1 . A radar system, comprising:

a radar sensor comprising:

a plurality of radar monolithic chips, wherein each of the radar monolithic chips comprises:

a radio frequency unit configured to receive echo data; and

a microprocessor coupled to the radio frequency unit and configured to preprocess the echo data by performing downsampling on X digital chirp signals received from the radio frequency unit to obtain first data comprising Y digital chirp signals, wherein both X and Y are positive integers greater than one, and wherein Y is less than X; and

a data combination module, comprising:

a processor configured to combine the first data of each of the radar monolithic chips to obtain combined data of the radar sensor; and

a communication interface coupled to the processor and configured to transmit the combined data; and

a central processing unit configured to perform post-processing on the combined data to obtain second data,

wherein the second data are configured to generate point cloud information of the radar system.

2 . The radar system of claim 1 , wherein the data combination module is further configured to transmit the combined data to the central processing unit.

3 . The radar system of claim 2 , wherein in a manner to combine the first data, the data combination module is further configured to package the first data when a signal transmission bit width between the data combination module and the central processing unit is greater than or equal to a bit width of the combined data.

4 . The radar system of claim 2 , wherein when a signal transmission bit width between the data combination module and the central processing unit is less than a bit width of the combined data, in a manner to combine the first data, the data combination module is further configured to:

convert the first data from parallel data into serial data;

cache the serial data; and

transmit the serial data to the central processing unit N times, wherein N is an integer greater than one.

5 . The radar system of claim 2 , wherein the central processing unit is further configured to perform speed measurement processing and angle measurement processing on the combined data to obtain measured speed data and measured angle data of the radar sensor.

6 . The radar system of claim 2 , wherein the radio frequency unit is further configured to:

send a first digital chirp signal to perform detection; and

receive, in response to sending the first digital chirp signal, a second digital chirp signal.

7 . The radar system of claim 6 , wherein the central processing unit is further configured to perform speed measurement processing and angle measurement processing on the second digital chirp signal.

8 . The radar system of claim 6 , wherein the data combination module is further configured to combine third digital chirp signals of each of the radar monolithic chips to obtain the combined data, and wherein the central processing unit is configured to perform post-processing on the third digital chirp signal in the combined data to obtain the second data.

9 . The radar system of claim 1 , wherein in a manner to preprocess the echo data, the microprocessor is further configured to compress the echo data to obtain first compressed data, wherein the data combination module is further configured to combine the first compressed data of each of the radar monolithic chips to obtain compressed combined data of the radar sensor, and wherein the central processing unit is further configured to decompress the compressed combined data.

10 . The radar system of claim 1 , wherein the central processing unit comprises a central radar-signal processing unit (RPU).

11 . The radar system of claim 1 , wherein each radar monolithic chip is a system on chip (SoC).

12 . The radar system of claim 1 , wherein the microprocessor is a radar-signal processing unit (RPU).

13 . The radar system of claim 1 , wherein the radar system comprises a plurality of radar sensors, and wherein the second data of the plurality of radar sensors is combined to generate the point cloud information.

14 . A radar system, comprising:

a radar sensor comprising:

a radio frequency unit configured to receive echo data; and

a microprocessor coupled to the radio frequency unit and configured to:

preprocess the echo data by performing downsampling on X digital chirp signals received from the radio frequency unit to obtain first data comprising Y digital chirp signals, wherein both X and Y are positive integers greater than one, and wherein Y is less than X; and

transmit the first data; and

a central processing unit configured to perform post-processing on the first data to obtain second data, wherein the second data are configured to generate point cloud information of the radar system.

15 . The radar system of claim 14 , wherein the microprocessor is further configured to transmit the first data to the central processing unit.

16 . The radar system of claim 14 , wherein the central processing unit is further configured to perform speed measurement processing and angle measurement processing on the first data to obtain measured speed data and measured angle data of the radar sensor.

17 . The radar system of claim 14 , wherein the radio frequency unit is further configured to:

send a first digital chirp signal to perform detection; and

receive, in response to sending the first digital chirp signal, a second digital chirp signal.

18 . The radar system of claim 14 , wherein in a manner to preprocess the echo data, the microprocessor is further configured to compress the echo data to obtain compressed data, and wherein the central processing unit is further configured to decompress the compressed data.

19 . The radar system of claim 14 , wherein the microprocessor is a radar-signal processing unit (RPU).

20 . The radar system of claim 14 , wherein the central processing unit comprises a central radar-signal processing unit (RPU).