Non-linear filtering of measurement report
Certain aspects of the present disclosure provide techniques for filtering measurement results at a user equipment (UE). According to certain aspects, a UE may receive reference signals transmitted from a network entity, apply a non-linear filter to measurement results, obtained based on the received reference signals, to obtain filtered measurement results, and transmit, to the network entity, a measurement report based on the filtered.
1 . An apparatus for wireless communications at a user equipment (UE), comprising:
at least one memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the apparatus to:
receive reference signals transmitted from a network entity;
apply a non-linear filter to measurements, obtained based on the reference signals, to obtain non-linearly filtered measurements, wherein the non-linear filter enables the apparatus to track rapid beam changes while averaging out at least one of noise, Doppler effects, or measurement errors associated with the measurements; and
transmit, to the network entity, a measurement report including the non-linearly filtered measurements.
2 . The apparatus of claim 1 , wherein the non-linear filter comprises a non-linear infinite impulse response (IIR) filter.
3 . The apparatus of claim 1 , wherein the non-linear filter comprises a linear component that is bound by a first value.
4 . The apparatus of claim 3 , wherein the first value is determined based on a configurable parameter X.
5 . The apparatus of claim 3 , wherein the non-linear filter converges to a linear filter if a change in a current measurement, relative to a previous measurement, is less than a threshold value.
6 . The apparatus of claim 4 , wherein the linear component comprises a function of a current measurement, a previous filtered measurement, and a filter coefficient a.
7 . The apparatus of claim 6 , wherein the one or more processors are further configured to cause the apparatus to select values for at least one of the configurable parameter X or the filter coefficient a, based on at least one condition.
8 . The apparatus of claim 7 , wherein the at least one condition involves a type of channel the UE is experiencing.
9 . The apparatus of claim 7 , wherein the at least one condition involves at least one of a location of the UE or an orientation of the UE.
10 . The apparatus of claim 7 , wherein the at least one condition involves mobility of the UE.
11 . The apparatus of claim 1 , wherein the non-linear filter enables the apparatus to track the rapid beam changes while averaging out noise, Doppler effects, and measurement errors associated with the measurements.
12 . A method for wireless communications at a user equipment (UE), comprising:
receiving reference signals transmitted from a network entity;
applying a non-linear filter to measurements, obtained based on the reference signals, to obtain non-linearly filtered measurements, wherein the non-linear filter enables the UE to track rapid beam changes while averaging out at least one of noise, Doppler effects, or measurement errors associated with the measurements; and
transmitting, to the network entity, a measurement report including the non-linearly filtered measurements.
13 . The method of claim 12 , wherein the non-linear filter comprises a non-linear infinite impulse response (IIR) filter.
14 . The method of claim 12 , wherein the non-linear filter comprises a linear component that is bound by a first value.
15 . The method of claim 14 , wherein the first value is determined based on a configurable parameter X.
16 . The method of claim 15 , wherein the linear component comprises a function of a current measurement, a previous filtered measurement, and a filter coefficient a.
17 . The method of claim 16 , further comprising selecting values for at least one of the configurable parameter X or the filter coefficient a, based on at least one condition.
18 . The method of claim 17 , wherein the at least one condition involves a type of channel the UE is experiencing.
19 . The method of claim 17 , wherein the at least one condition involves at least one of a location of the UE or an orientation of the UE.
20 . The method of claim 17 , wherein the at least one condition involves mobility of the UE.
21 . The method of claim 14 , wherein the non-linear filter converges to a linear filter if a change in a current measurement, relative to a previous measurement, is less than a threshold value.
22 . An apparatus for wireless communications at a user equipment (UE), comprising:
means for receiving reference signals transmitted from a network entity;
means for applying a non-linear filter to measurements, obtained based on the reference signals, to obtain non-linearly filtered measurements, wherein the non-linear filter enables the apparatus to track rapid beam changes while averaging out at least one of noise, Doppler effects, or measurement errors associated with the measurements; and
means for transmitting, to the network entity, a measurement report including the non-linearly filtered measurements.
23 . A non-transitory computer-readable medium comprising executable instructions that, when executed by one or more processors of an apparatus, cause the apparatus to:
receive reference signals transmitted from a network entity;
apply a non-linear filter to measurements, obtained based on the reference signals, to obtain non-linearly filtered measurements, wherein the non-linear filter enables the apparatus to track rapid beam changes while averaging out at least one of noise, Doppler effects, or measurement errors associated with the measurements; and
transmit, to the network entity, a measurement report including the non-linearly filtered measurements.