Radar system, a radar arrangement, and a radar method for concurrent radar operations
systems and methods include a transmitter with a control unit that is configured to generate a code, including data identifying a plurality of regions and a transmitter-specific cyclic shift scheme. The cyclic shift scheme results in a re-arrangement of the regions (using a change of time offset) that is different (transmitter-specific) for each of the transmitters. The transmitter generates a signal based on the code and transmits the signal via an antenna. The radar system includes a receiver configured to receive an echo of the signal via a second antenna that is reflected from a target and identifies the transmitter from the echo based on the transmitter-specific cyclic shift scheme.
1. A radar system, comprising:
a transmitter configured to:
provide a code comprising a first gap at a beginning, a second gap at an end, a cyclic prefix, an N chips segment following the cyclic prefix, and a training sequence;
identify a plurality of regions within the code based on the cyclic prefix and the N chips segment;
apply a transmitter-specific cyclic shift scheme to the plurality of regions;
generate a signal from the code and transmit the signal; and
a receiver, configured to:
receive an echo of the signal; and
identify the transmitter based on the transmitter-specific cyclic shift scheme.
2. The radar system according to claim 1 ,
wherein the transmitter-specific cyclic shift scheme comprises arranging the regions of the code in a specific order, thereby providing a time offset to the regions.
3. The radar system according to claim 2 ,
wherein the code comprises a sequence of code symbols, and
wherein at least some of the plurality of regions are within at least one of the code symbols.
4. The radar system according to claim 2 ,
wherein the radar system is implemented as one of a monostatic radar application, a multi-static radar application, a statistical MIMO application, a coherent MIMO application.
5. The radar system according to claim 2 , further comprising at least one of the following features:
wherein the transmitter and the receiver apply the same transmitter-specific cyclic shift scheme or a different cyclic shift scheme;
wherein the radar system is a pulse radar system;
wherein the radar system is configured for transmitting and receiving ultra-wide band, UWB, signals, and echoes thereof;
wherein a code symbol encodes a plurality of bits using a digital modulation scheme.
6. The radar system according to claim 2 ,
wherein the code comprises auto-correlation properties that reduce interference from other transmitters inside of a region of the plurality of regions.
7. The radar system according to claim 1 ,
wherein the code comprises a sequence of code symbols, and
wherein at least some of the plurality of regions are within at least one of the code symbols.
8. The radar system according to claim 1 ,
wherein the radar system is implemented as one of a monostatic radar application, a multi-static radar application, a statistical MIMO application, a coherent MIMO application.
9. The radar system according to claim 1 , further comprising at least one of the following features:
wherein the transmitter and the receiver apply the same transmitter-specific cyclic shift scheme or a different cyclic shift scheme;
wherein the radar system is a pulse radar system;
wherein the radar system is configured for transmitting and receiving ultra-wide band, UWB, signals, and echoes thereof; and
wherein a code symbol encodes a plurality of bits using a digital modulation scheme.
10. The radar system according to claim 1 ,
wherein the code comprises auto-correlation properties that reduce interference from other transmitters inside of a region of the plurality of regions.
11. The radar system according to claim 1 , further comprising:
a further transmitter configured to:
provide a further code,
identify a further plurality of regions within the further code,
apply a further transmitter-specific cyclic shift scheme to the further plurality of regions,
generate a further signal from the further code and transmit the further signal; and
a further receiver, configured to
receive at least one of:
the echo of the signal,
an echo of the further signal, and
identify at least one of:
the transmitter based on the transmitter-specific cyclic shift scheme, and
the further transmitter based on the further transmitter-specific cyclic shift scheme.
12. The radar system according to claim 11 , comprising at least one of the following features:
wherein the transmitter-specific cyclic shift scheme is different from the further transmitter-specific cyclic shift scheme;
wherein the plurality of regions and the further plurality of regions are the same or different.
13. The radar system according to claim 11 ,
wherein the transmitter and the further transmitter are synchronized.
14. The radar system according to claim 11 ,
wherein the radar arrangement is implemented as one of the group which consists of a monostatic radar application, a multi-static radar application, a statistical MIMO application, a coherent MIMO application.
15. The radar system of claim 1 , wherein the training sequence comprises a cyclic training sequence.
16. The radar system of claim 1 , wherein the code is included in a packet configuration for transmission via the transmitter.
17. A method of performing a radar operation including a plurality of transmitters and receivers, the method comprising:
generating a code comprising a first gap at a beginning, a second gap at an end, a cyclic prefix, an N chips segment following the cyclic prefix, and a training sequence;
identifying a plurality of regions within the code based on the cyclic prefix and the N chips segment;
applying a transmitter-specific cyclic shift scheme to the plurality of regions;
generating a signal from the code and transmitting the signal;
receiving an echo of the signal; and
identifying a specific transmitter based on the transmitter-specific cyclic shift scheme.
18. The method according to claim 17 , further comprising at least one of the following steps:
exchanging the transmitter-specific cyclic shift scheme within a transmitter-receiver pair;
broadcasting the transmitter-specific cyclic shift scheme to at least one of a transmitter and a receiver.
19. The method according to claim 17 , further comprising:
updating the transmitter-specific cyclic shift scheme.
20. The method according to claim 19 , wherein updating comprises changing the cyclic shift in a pseudo-random manner.