US 11,444,733 B2 · Pilot signaling supporting digital post-distortion (DPoD) techniques

Abstract

Methods, systems, and devices for wireless communications are described. Some systems may support digital post-distortion (DPoD) processing at a base station. In some such systems, a user equipment (UE) may process a data message for transmission, where a resulting signal associated with the data message includes non-linear characteristics that are handled by DPoD on the receiver-side. The non-linear characteristics may cause the signal to leak into out-of-band (OOB) resources, potentially resulting in interference. In some examples, the UE may transmit the data message to the base station in a multi-user system. To support mitigation of non-linear interference on signaling by other UEs, the UE may additionally transmit pilot signals in OOB resources (e.g., in addition to in-band resources) where the non-linearity may be expected to negatively affect other communications. The base station may use the OOB pilot signals to perform channel estimation and interference mitigation.

Claims30

Dependent claims

A method for wireless communications at a user equipment (UE), comprising:

transmitting, to a network device, a first pilot signal within a first set of frequency resources, wherein the first set of frequency resources comprises in-band frequency resources allocated for data communications of the UE;
and
transmitting, to the network device, a second pilot signal outside the first set of frequency resources and within a second set of frequency resources, wherein:
the first set of frequency resources is a subset of the second set of frequency resources, the second set of frequency resources comprising the in-band frequency resources allocated for the data communications of the UE and further comprising out-of-band frequency resources unallocated for the data communications of the UE;
and
the first pilot signal and the second pilot signal are associated with a same data message.

3 more elements

A method for wireless communications at a network device, comprising:

allocating a first set of frequency resources to a user equipment (UE), the first set of frequency resources comprising in-band frequency resources for data communications of the UE;
receiving, from the UE, a plurality of pilot signals distributed across a second set of frequency resources different from the first set of frequency resources, wherein the first set of frequency resources is a subset of the second set of frequency resources, the second set of frequency resources comprising the in-band frequency resources allocated for the data communications of the UE and further comprising out-of-band frequency resources unallocated for the data communications of the UE;
performing channel estimation based at least in part on the plurality of pilot signals;
and
decoding a data message based at least in part on the channel estimation.

2 more elements

An apparatus for wireless communications at a user equipment (UE), comprising a processor, memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a network device, a first pilot signal within a first set of frequency resources, wherein the first set of frequency resources comprises in-band frequency resources allocated for data communications of the UE;
and
transmit, to the network device, a second pilot signal outside the first set of frequency resources and within a second set of frequency resources, wherein:
the first set of frequency resources is a subset of the second set of frequency resources, the second set of frequency resources comprising the in-band frequency resources allocated for the data communications of the UE and further comprising out-of-band frequency resources unallocated for the data communications of the UE;
and
the first pilot signal and the second pilot signal are associated with a same data message.

3 more elements

An apparatus for wireless communications at a network device, comprising a processor, memory coupled to the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to:

allocate a first set of frequency resources to a user equipment (UE), the first set of frequency resources comprising in-band frequency resources for data communications of the UE;
receive, from the UE, a plurality of pilot signals distributed across a second set of frequency resources different from the first set of frequency resources, wherein the first set of frequency resources is a subset of the second set of frequency resources, the second set of frequency resources comprising the in-band frequency resources allocated for the data communications of the UE and out-of-band frequency resources unallocated for the data communications of the UE;
perform channel estimation based at least in part on the plurality of pilot signals;
and
decode a data message based at least in part on the channel estimation.

2 more elements

Dependencies are inferred from the claim text.

Pilot signaling supporting digital post-distortion (DPoD) techniques

Life of this patent

Pilot signaling supporting digital post-distortion (DPoD) techniques

Life of this patent

Abstract

Claims30