Sensing-assisted channel estimation
Some embodiments of the present disclosure provide for use of a linear chirp signal as a basis for a sensing signal. Modification of the linear chirp signal by a signature function can allow a receiver of the sensing signal to determine an identity for a source of the sensing signal. Accordingly, upon processing the received sensing signal to obtain path parameter estimates, the receiver can direct a transmission of an indication of the path parameter estimates to the source of the sensing signal. Aspects of the present application relate to performing multi-node, multi-path channel estimation on the basis of processing the received sensing signal. Conveniently, the processing is performed with low complexity.
1. A method of estimating channel parameters for a wireless channel between a transmitter node and a receiver node, the method comprising:
receiving, by the receiver node, an indication of a plurality of sensing signal parameters of a sensing signal, wherein at least one sensing signal parameter among the plurality of sensing signal parameters is associated with the transmitter node;
receiving, by the receiver node, the sensing signal, wherein the sensing signal comprises a linear chirp signal; and
transmitting, by the receiver node to the transmitter node, a channel parameter obtained by processing the received sensing signal.
2. The method of claim 1 , wherein the plurality of sensing signal parameters comprises a chirp slope value and a frequency offset value of the linear chirp signal.
3. The method of claim 2 , wherein the frequency offset value is associated with the transmitter node.
4. The method of claim 3 , further comprising:
determining, based on the frequency offset value, an identity of the transmitter node; and
wherein the transmitting the channel parameter includes transmitting the channel parameter to the transmitter node based on the determined identity.
5. The method of claim 1 , wherein the sensing signal parameters comprise an indication of a reduced measurement window for use during the processing the received sensing signal.
6. The method of claim 1 , wherein the processing comprises de-chirping the received sensing signal.
7. An apparatus adapted for estimating channel parameters for a wireless channel between a transmitter node and a receiver node, the apparatus comprising:
a processor; and
a non-transitory memory including instructions that, when executed by the processor, cause the apparatus to:
receive an indication of a plurality of sensing signal parameters of a sensing signal, wherein at least one sensing signal parameter among the plurality of sensing signal parameters is associated with the transmitter node;
receive the sensing signal, wherein the sensing signal comprises a linear chirp signal; and
transmitting, to the transmitter node, a channel parameter obtained by processing the received sensing signal.
8. The apparatus of claim 7 , wherein the plurality of sensing signal parameters comprises a chirp slope value and a frequency offset value of the linear chirp signal.
9. The apparatus of claim 8 , wherein the frequency offset value is associated with the transmitter node.
10. The apparatus of claim 9 , wherein the non-transitory memory further include instructions that, when executed by the processor, cause the apparatus to:
determine, based on the frequency off value, an identity of the transmitter node; and
transmit the channel parameter to the transmitter node based on the determined identity.
11. The apparatus of claim 7 , wherein the sensing signal parameters comprise an indication of a reduced measurement window for use by the processor during the processing the received sensing signal.
12. The apparatus of claim 7 , wherein the non-transitory memory further include instructions that, when executed by the processor, cause the apparatus to de-chirp the received sensing signal.
13. A method of estimating channel parameters for a wireless channel between a transmitter node and a receiver node, the method comprising:
transmitting, by the transmitter node, an indication of a plurality of sensing signal parameters of a sensing signal, wherein at least one sensing signal parameter among the plurality of sensing signal parameters is associated with the transmitter node;
transmitting, by the transmitter node, the sensing signal wherein the sensing signal comprises a linear chirp signal; and
receiving, by the transmitter node, a channel parameter from the receiver node.
14. The method of claim 13 , wherein the plurality of sensing signal parameters comprises a chirp slope value and a frequency offset value of the linear chirp signal.
15. The method of claim 14 , wherein the frequency offset value is associated with the transmitter node.
16. The method of claim 13 , wherein the sensing signal parameters comprise an indication of a reduced measurement window for use in processing a reception of the transmitted sensing signal.
17. An apparatus adapted for facilitating estimation of channel parameters for a wireless channel between a transmitter node and a receiver node, the apparatus comprising:
a processor; and
a non-transitory memory including instructions that, when executed by the processor, cause the apparatus to:
transmit an indication of a plurality of sensing signal parameters of a sensing signal, wherein at least one sensing signal parameter among the plurality of sensing signal parameters is associated with the transmitter node;
transmit the sensing signal wherein the sensing signal comprises a linear chirp signal; and
receive a channel parameter from the receiver node.
18. The apparatus of claim 17 , wherein the plurality of sensing signal parameters comprise a chirp slope value and a frequency offset value of the linear chirp signal.
19. The apparatus of claim 18 , wherein the frequency offset value is associated with the apparatus.
20. The apparatus of claim 17 , wherein the sensing signal parameters comprise an indication of a reduced measurement window for use in processing a reception of the transmitted sensing signal.