Signal sending method, signal processing method, and radar apparatus

A signal processing method, applied to a radar apparatus having a plurality of transmit antennas consecutively numbered based on an order of their physical locations, wherein the plurality of transmit antennas comprise at least two transmit antenna groups and at least one receive antenna determined before each transmission of a signal by the at least two transmit antenna groups, the method comprising:

• determining at least two groups of detection information based on at least one signal received by the at least one receive antenna,
• wherein each of the at least two groups of detection information is associated with one of the at least two transmit antenna groups,
• wherein each of the at least two transmit antenna groups comprises at least two transmit antennas in a virtual antenna array, and
• wherein the at least two transmit antennas in each of the at least two transmit antenna groups have nonconsecutive numbers in the consecutively numbered transmit antennas so as to maximize a phase jump between transmitter elements of the virtual antenna array;
• and
• sending signals by using the at least two transmit antenna groups;
• wherein each of the at least two transmit antenna groups sends signals in a time division multiplexing (TDM) manner with respect to each other, and
• wherein the at least two transmit antennas in each of the at least two transmit antenna groups send signals in a code division multiplexing (CDM) manner;
• determining at least three pieces of detection information based on the at least two groups of detection information,
• wherein the at least three pieces of detection information are used to determine a velocity estimation value of a target, and
• wherein each of the at least three pieces of detection information is associated with each of at least three transmit antennas;
• and
• determining a real velocity of the target based on a first velocity ambiguity multiple and the velocity estimation value of the target,
• wherein the first velocity ambiguity multiple is one of at least two velocity ambiguity multiples associated with the at least two groups of detection information.

An apparatus comprising:

• at least one processor configured to determine at least two transmit antenna groups of a plurality of transmit antennas consecutively numbered based on an order of their physical locations;
• each of the at least two transmit antenna groups comprises at least two transmit antennas in a virtual antenna array;
• each of the at least two transmit antenna groups is configured to send signals in a time division multiplexing (TDM) manner with respect to each other;
• and
• any two transmit antennas in each transmit antenna group have nonconsecutive numbers in the consecutively numbered transmit antennas so as to maximize a phase jump between transmitter elements of the virtual antenna array,
• wherein each of the at least two transmit antennas in the at least two transmit antenna groups sends signals in a code division multiplexing (CDM) manner.

An radar apparatus having a plurality of transmit antennas consecutively numbered based on an order of their physical locations, the radar apparatus comprising:

• a memory configured to store instructions;
• and
• a processor configured to execute the instructions, so that the radar apparatus or a device on which the radar apparatus is installed performs a method of:
• dividing the plurality of transmit antennas into at least two transmit antenna groups before each transmission of a signal by the at least two transmit antenna groups,
• wherein each transmit antenna group among the at least two transmit antenna groups comprises at least two transmit antennas in a virtual antenna array,
• wherein the at least two transmit antennas in each transmit antenna group have nonconsecutive numbers in the consecutively numbered transmit antennas so as to maximize a phase jump between transmitter elements of the virtual antenna array;
• and
• sending signals by using the at least two transmit antenna groups,
• wherein each of the at least two transmit antenna groups sends signals in a time division multiplexing (TDM) manner with respect to each other, and
• wherein the at least two transmit antennas in each of the at least two transmit antenna groups send signals in a code division multiplexing (CDM) manner.