Soft-windowing channel estimation
First Claim
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1. A method for wireless communications by a user equipment (UE), comprising:
- determining, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, wherein determining the timing window comprises calculating a mean channel energy response (CER) of samples of the channel;
determining a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, wherein determining the set of weights comprises;
determining mask values based on the determined timing window;
multiplying each sample of the channel by a corresponding mask value to determine masked sample values;
determining a set of threshold values based on the timing window; and
determining the weight corresponding to each sample based on comparing the corresponding masked sample value to products determined by multiplying each of the set of threshold values by the mean CER; and
estimating the channel by applying the weights to the corresponding samples.
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Abstract
Certain aspects of the present disclosure relate to techniques for estimating a channel using soft-windowing. A user equipment (UE) may determine, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, determine a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, and estimate the channel by applying the weights to the samples.
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Citations
16 Claims
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1. A method for wireless communications by a user equipment (UE), comprising:
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determining, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, wherein determining the timing window comprises calculating a mean channel energy response (CER) of samples of the channel; determining a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, wherein determining the set of weights comprises; determining mask values based on the determined timing window; multiplying each sample of the channel by a corresponding mask value to determine masked sample values; determining a set of threshold values based on the timing window; and determining the weight corresponding to each sample based on comparing the corresponding masked sample value to products determined by multiplying each of the set of threshold values by the mean CER; and estimating the channel by applying the weights to the corresponding samples. - View Dependent Claims (2, 3, 4)
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5. An apparatus for wireless communications by a user equipment (UE), comprising:
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a processing system configured to; determine, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, wherein the processing system is configured to calculate a mean channel energy response (CER) of samples of the channel as part of determining the timing window; determine a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window and wherein the processing system is configured to determine the set of weights by; determining mask values based on the determined timing window, multiplying each sample of the channel by a corresponding mask value to determine masked sample values, determining a set of threshold values based on the timing window, and determining the weight corresponding to each sample based on comparing the corresponding masked sample value to products determined by multiplying each of the set of threshold values by the mean CER; and estimate the channel by applying the weights to the corresponding samples; and a memory coupled with the processing system. - View Dependent Claims (6, 7, 8)
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9. An apparatus for wireless communications, comprising:
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means for determining, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, wherein the means for determining the timing window comprises means for calculating a mean channel energy response (CER) of samples of the channel; means for determining a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, wherein the means for determining the set of weights comprises; means for determining mask values based on the determined timing window; means for multiplying each sample of the channel by a corresponding mask value to determine masked sample values; means for determining a set of threshold values based on the timing window; and means for determining the weight corresponding to each sample based on comparing the corresponding masked sample value to products determined by multiplying each of the set of threshold values by the mean CER; and means for estimating the channel by applying the weights to the corresponding samples. - View Dependent Claims (10, 11, 12)
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13. A non-transitory computer-readable medium for wireless communications comprising instructions that, when executed by a processor, cause the processor to perform operations comprising:
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determining, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, wherein determining the timing window comprises calculating a mean channel energy response (CER) of samples of the channel; determining a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, wherein determining the set of weights comprises; determining mask values based on the determined timing window; multiplying each sample of the channel by a corresponding mask value to determine masked sample values; determining a set of threshold values based on the timing window; and determining the weight corresponding to each sample based on comparing the corresponding masked sample value to products determined by multiplying each of the set of threshold values by the mean CER; and estimating the channel by applying the weights to the corresponding samples. - View Dependent Claims (14, 15, 16)
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Specification