System and method for phase noise compensation
An apparatus is configured to be employed within a base station. The apparatus comprises baseband circuitry which includes a radio frequency (RF) interface and one or more processors. The one or more processors are configured to arrange phase tracking reference signal (PT-RS) resource elements (REs) and data REs as an arrangement for a transmission based on one or more diversity factors. The one or more diversity factors include a time domain and a frequency domain. The one or more processors are also configured to provide the transmission having the PT-RS REs to the RF interface for transmission to a user equipment (UE) device.
1. An apparatus for a user equipment (UE) device, comprising baseband circuitry having:
a radio frequency (RF) interface configured to receive a transmission from a base station; and
one or more processors configured to:
obtain one or more phase tracking reference signals (PT-RSs) from one or more PT-RS resource elements (REs) from the received transmission according to an arrangement, wherein the one or more PT-RSs are received from one or more transmitter antenna ports (APs);
obtain a demodulation reference signal (DMRS) from the received transmission, wherein a PT-RS received from a respective AP is associated with a respective DMRS antenna port;
process a received transmission based on the one or more PT-RS and the DMRS: and
dynamically determine a presence of PT-RS in the received transmission from a modulation and coding scheme (MCS) and a bandwidth.
2. The apparatus of claim 1 , wherein the arrangement is based on one or more diversity factors, wherein the one or more diversity factors include one or more of symbols, subcarriers, APs, DMRS APs, pairing, and precoders.
3. The apparatus of claim 1 , wherein the PT-RS is received from a number of APs which is less than a number of DMRS APs.
4. The apparatus of claim 1 , wherein the bandwidth is compared to a bandwidth threshold received from higher layers to dynamically determine the presence of PT-RS in the received transmission.
5. The apparatus of claim 1 , wherein to process the received transmission the one or more processors are further configured to process a group of resource blocks of the received transmission using PT-RS received in PT-RS REs within the group of resource blocks.
6. The apparatus of claim 1 , wherein the association of the PT-RS received from the respective AP with the respective DMRS antenna port is predefined in a specification.
7. The apparatus of claim 1 , wherein the association of the PT-RS received from the respective AP with the respective DMRS antenna port is dynamically indicated in downlink control information.
8. The apparatus of claim 1 , wherein a first PT-RS received from a first AP associated with a first respective DMRS AP is received on first REs, the first REs corresponding to first subcarriers, wherein a second PT-RS received from a second AP associated with a second DMRS AP is received on second REs, the second REs corresponding to second subcarriers, and wherein the first and second subcarriers are disjoint.
9. The apparatus of claim 1 , wherein the PT-RS received from the AP associated with the respective DMRS antenna port is received on first REs using a PT-RS sequence, wherein the PT-RS sequence is based on a DMRS sequence of the DMRS received from the respective DMRS antenna port.
10. An apparatus for a base station, comprising baseband circuitry having:
a radio frequency (RF) interface configured to receive a transmission from a user equipment device, and
one or more processors configured to:
obtain one or more phase tracking reference signals (PT-RSs) from one or more PT-RS resource elements (REs) from the received transmission according to an arrangement, wherein the one or more PT-RSs are received from one or more transmitter antenna ports (APs);
obtain a demodulation reference signal (DMRS) from the received transmission, wherein a PT-RS received from a respective AP is associated with a respective DMRS AP;
process a received transmission based on the one or more PT-RS and the DMRS: and
dynamically determine a presence of PT-RS in the received transmission from a modulation and coding scheme (MCS) and a bandwidth.
11. The apparatus of claim 10 , wherein the arrangement based on one or more diversity factors, wherein the one or more diversity factors include one or more of symbols, subcarriers, APs, DMRS APs, pairing, and precoders.
12. The apparatus of claim 10 , wherein the PT-RS is received from a number of APs which is less than a number of DMRS APs.
13. The apparatus of claim 10 , wherein the bandwidth is compared to a bandwidth threshold received from higher layers to dynamically determine the presence of PT-RS in the received transmission.
14. The apparatus of claim 10 , wherein to process the received transmission the one or more processors are further configured to process a group of resource blocks of the received transmission using PT-RS received in PT-RS REs within the group of resource blocks.
15. The apparatus of claim 10 , wherein the association of the PT-RS received from the respective AP with the respective DMRS AP is predefined in a specification.
16. The apparatus of claim 10 , wherein the association of the PT-RS received from the respective AP with the respective DMRS AP is dynamically indicated in uplink control information.
17. The apparatus of claim 10 , wherein a first PT-RS received from a first AP associated with a first respective DMRS AP is received on first REs, the first REs corresponding to first subcarriers, wherein a second PT-RS received from a second AP associated with a second DMRS AP is received on second REs, the second REs corresponding to second subcarriers, and wherein the first and second subcarriers are disjoint.
18. The apparatus of claim 10 , wherein the PT-RS received from the AP associated with the respective DMRS AP is received on first REs using a PT-RS sequence, wherein the PT-RS sequence is based on a DMRS sequence of the DMRS received from the respective DMRS AP.