Method for radar sensing using communication signals with single carrier preamble and multi-carrier data
The disclosure relates to the field of radar sensors, particularly to radar sensors for radar sensing using wireless communication signals. The method includes: receiving a reflected communication signal, wherein the reflected communication signal is a sent communication signal that is reflected by at least one object. The frequency of the sent communication signal is within a radar frequency range, and the sent communication signal includes a sent data payload, and the reflected communication signal includes a corresponding reflected data payload. The reflected data payload is compared with the sent data payload, resulting in a compared data payload; and a delay information and/or a velocity information of the at least one object is extracted from the compared data payload.
1 . A method for radar sensing using wireless communication signals, comprising:
receiving, by a receiver, a reflected communication signal corresponding to a sent communication signal reflected by at least one object, the sent communication signal having a frequency within a radar frequency range;
wherein the sent communication signal comprises a sent data payload comprising non-standardized bit-sequences and the reflected communication signal comprises a corresponding reflected data payload comprising bit-sequences corresponding to the non-standardized bit-sequences;
comparing, by signal-processing circuitry, the corresponding reflected data payload with the sent data payload to produce a compared data payload; and
extracting, by evaluation circuitry, delay information and/or velocity information of the at least one object from the compared data payload.
2 . The method of claim 1 , wherein
the sent communication signal further comprises a sent preamble part and the reflected communication signal further comprises a corresponding reflected preamble part;
the comparing comprises a comparison of the sent preamble part with the corresponding reflected preamble part to produce a compared preamble part; and
the extracting comprises deriving the delay information and/or the velocity information based on the compared preamble part.
3 . The method of claim 1 , wherein the comparing comprises generating an ambiguity function by correlating;
the corresponding reflected data payload with the sent data payload; and/or
the corresponding reflected preamble part with the sent preamble part,
using a matched filter or a bank of correlators.
4 . The method of claim 2 , wherein the comparing further comprises applying a min-point selection, which combines the compared data payload and the compared preamble part into a single ambiguity function.
5 . The method of claim 1 , wherein the radar frequency range is between 30 GHz and 300 GHZ.
6 . The method of claim 1 , wherein the communication signal uses Orthogonal Frequency-Division Multiplexing, (OFDM) signal waveforms.
7 . The method of claim 1 , wherein the communication signal conforms to at least one of IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, IEEE 802.11ad, IEEE 802.11p, IEEE 802.11bd, or a proprietary protocol adapted for communicating the communication signal within the radar frequency range.
8 . A non-transitory computer-readable storage medium comprising a computer program product having instructions stored thereon which, when executed by a processor and/or a control unit, cause the processor and/or the control unit to carry out the method of claim 1 .
9 . A non-transitory computer-readable storage medium on which a computer program according to claim 8 is stored.
10 . A receiver for joint radar and wireless communication (JRC), the receiver comprising signal-processing circuitry configured to perform the method of claim 1 .
11 . The receiver of claim 10 , wherein the receiver is co-located with a transmitter configured to transmit the communication signal.
12 . The receiver of claim 10 , wherein the receiver comprises a low noise amplifier (LNA) and/or a mixer configured to generate an intermediate frequency, and wherein the receiver and the transmitter are configured to use a common oscillator signal.
13 . A communication system comprising the receiver according to claim 10 and a corresponding transmitter configured to transmit a communication signal.
14 . A vehicle comprising the receiver according to claim 10 and/or a communication system comprising the receiver and a corresponding transmitter configured to transmit a communication signal.
15 . The method of claim 5 , wherein the radar frequency range is between 50 GHz and 150 GHz.
16 . The method of claim 5 , wherein the radar frequency range is between 57 GHz and 71 GHz.