Systems and methods for mapping DMRS configuration to phase noise tracking pilot for improved receiver performance
According to certain embodiments, a user equipment ( 810 ) is provided for use in a cellular network. The user equipment ( 810 ) may include a transceiver ( 910 ), a processor ( 920 ), and a memory ( 930 ). The user equipment ( 810 ) may be configured to acquire a Demodulation Reference Signal (DMRS) configuration. A mapping is determined from the DMRS configuration to a phase noise tracking reference signal (PNT-RS). A channel estimate is performed using the DMRS configuration. Phase noise estimation and compensation is performed based on the PNT-RS by using the mapping and the channel estimate.
1. A user equipment for use in a cellular network, the user equipment comprising a transceiver, a processor, and a memory, the user equipment configured to:
acquire a Demodulation Reference Signal (DMRS) configuration;
determine a mapping from the DMRS configuration to a phase noise tracking reference signal (PNT-RS);
perform a channel estimate using the DMRS configuration; and
perform phase noise estimation and compensation, based on the PNT-RS, using the mapping and the channel estimate.
2. The user equipment of claim 1 , wherein determining the mapping comprises mapping the PNT-RS to a specific DMRS port.
3. The user equipment of claim 1 , wherein the phase noise estimation and compensation is based on a PNT-RS receiver setting, which is based on the mapping and the channel estimate.
4. The user equipment of claim 1 , wherein the DMRS configuration is acquired based on a DMRS transmitted by the cellular network.
5. The user equipment of claim 1 , wherein the channel estimate is calculated using the DMRS configuration.
6. The user equipment of claim 1 , wherein the DMRS occupies a greater number of subcarriers per subframe than the PNT-RS, and wherein the PNT-RS occupies a greater number of OFDM symbols per subframe than the DMRS.
7. The user equipment of claim 1 , wherein the DMRS occupies a plurality of subcarriers that are separated by a plurality of other subcarriers, and wherein the PNT-RS occupies a plurality of successive OFDM symbols.
8. The user equipment of claim 7 , wherein the DMRS occupies two or more sets of adjacent subcarriers, each set of adjacent subcarriers separated by a plurality of other subcarriers, and wherein the PNT-RS occupies a plurality of successive OFDM symbols not occupied by the DMRS.
9. A method by a user equipment for use in a cellular network, the method comprising:
acquiring a Demodulation Reference Signal (DMRS) configuration;
determining a mapping from the DMRS configuration to a phase noise tracking reference signal (PNT-RS);
performing a channel estimate using the DMRS configuration; and
performing phase noise estimation and compensation, based on the PNT-RS, using the mapping and the channel estimate.
10. The method of claim 9 , wherein determining the mapping comprises mapping the PNT-RS to a specific DMRS port.
11. The method of claim 9 , wherein the phase noise estimation and compensation is based on a PNT-RS receiver setting, which is based on the mapping and the channel estimate.
12. The method of claim 11 , wherein the DMRS configuration is acquired based on a DMRS transmitted by the cellular network.
13. The method of claim 9 , wherein the channel estimate is calculated using the DMRS configuration.
14. The method of claim 9 , wherein the DMRS occupies a greater number of subcarriers per subframe than the PNT-RS, and wherein the PNT-RS occupies a greater number of OFDM symbols per subframe than the DMRS.
15. The method of claim 9 , wherein the DMRS occupies a plurality of subcarriers that are separated by a plurality of other subcarriers, and wherein the PNT-RS occupies a plurality of successive OFDM symbols.
16. The method of claim 15 , wherein the DMRS occupies two or more sets of adjacent subcarriers, each set of adjacent subcarriers separated by a plurality of other subcarriers, and wherein the PNT-RS occupies a plurality of successive OFDM symbols not occupied by the DMRS.
17. A network node for use in a cellular network, the network node comprising a transceiver, a processor, and a memory, the network node configured to:
acquire a Demodulation Reference Signal (DMRS) configuration;
determine a mapping from the DMRS configuration to a phase noise tracking reference signal (PNT-RS);
perform a channel estimate using the DMRS configuration; and
perform phase noise estimation and compensation, based on the PNT-RS, using the mapping and the channel estimate.
18. A method by a network node for use in a cellular network, the method comprising:
acquiring a Demodulation Reference Signal (DMRS) configuration;
determining a mapping from the DMRS configuration to a phase noise tracking reference signal (PNT-RS);
performing a channel estimate using the DMRS configuration; and
performing phase noise estimation and compensation, based on the PNT-RS, using the mapping and the channel estimate.