JP-7856776-B2 - System and method for utilizing Doppler frequency values for wireless communication

JP7856776B2JP 7856776 B2JP7856776 B2JP 7856776B2JP-7856776-B2

Inventors

ファン、ミン
ダイ、ジン
ハオ、チェンシー
ウー、リャンミン
シー、ウェイ
ウェイ、チャオ
シュー、ハオ

Assignees

クゥアルコム・インコーポレイテッド

Dates

Publication Date: 20260511
Application Date: 20220217

Claims (20)

A method of wireless communication using user equipment (UE), Receiving a set of reference signals, Based at least partially on the aforementioned set of reference signals, Transmitting a set of Doppler frequency values and a set of weight values corresponding to the set of Doppler frequency values, Equipped with , The transmission of the set of Doppler frequency values and the set of weight values comprises applying timing parameters for transmitting the set of Doppler frequency values and the set of weight values. method.
The set of reference signals corresponds to the first beam among the multiple beams, The plurality of beams correspond to the first transmission layer among the plurality of transmission layers, The method according to claim 1.
The method according to claim 2, further comprising transmitting a set of delay values corresponding to the first beam, at least partially based on the set of reference signals.
The method according to claim 3, wherein each Doppler frequency value in the set of Doppler frequency values is associated with at least one delay value from the set of delay values.
The method according to claim 3, wherein each delay value in the set of delay values is associated with at least one Doppler frequency value from the set of Doppler frequency values.
The transmission of the set of Doppler frequency values is A size-delimited parameter, The first threshold number of Doppler frequency values, or The second threshold number of delay-Doppler value pairs, The method according to claim 1, comprising applying a size delimiter parameter that defines a size delimiter.
To generate a quantized set of Doppler frequency values, the method further includes quantizing the set of Doppler frequency values, The transmission of the set of Doppler frequency values is The method according to claim 1, comprising transmitting the quantized set of Doppler frequency values.
To generate a quantized set of weight values, the method further includes quantizing the set of weight values, The transmission of the set of weight values is The method according to claim 1, comprising transmitting the quantized set of weight values.
Determining the set of commonality parameters, The method according to claim 1, further comprising applying the set of commonality parameters to the set of Doppler frequency values in order to generate a compressed set of Doppler frequency values, wherein the transmission of the set of Doppler frequency values comprises transmitting the compressed set of Doppler frequency values.
A device for wireless communication using user equipment (UE), Processor and A transceiver communicatively coupled to the aforementioned processor, The processor comprises a memory that is communicably coupled to the aforementioned processor, The aforementioned device is Receive a set of reference signals, Based at least partially on the aforementioned set of reference signals, (i) a set of Doppler frequency values, and (ii) a set of weight values corresponding to the set of Doppler frequency values, are configured to transmit The transmission of the set of Doppler frequency values and the set of weight values comprises applying timing parameters for transmitting the set of Doppler frequency values and the set of weight values. Device.
The set of reference signals corresponds to the first beam among the multiple beams, The plurality of beams correspond to the first transmission layer among the plurality of transmission layers, The apparatus according to claim 10.
The aforementioned device is The apparatus according to claim 11, further configured to transmit a set of delay values corresponding to the first beam, at least partially based on the set of reference signals.
The transmission of the set of Doppler frequency values is A size-delimited parameter, The first threshold number of Doppler frequency values, or The second threshold number of delay-Doppler value pairs, The apparatus according to claim 10, comprising applying a size delimiter parameter that defines a size delimiter parameter.
The aforementioned device is It is further configured to quantize the set of Doppler frequency values in order to generate a quantized set of Doppler frequency values, The transmission of the set of Doppler frequency values is The apparatus according to claim 10, comprising transmitting the quantized set of Doppler frequency values.
The aforementioned device is It is further configured to quantize the set of weight values in order to generate a quantized set of weight values, The transmission of the set of weight values is The apparatus according to claim 10, comprising transmitting the quantized set of weight values.
A method of wireless communication by a scheduling entity, Sending a Channel Status Information (CSI) reporting configuration message, Receiving a set of Doppler frequency values, Receiving a set of weight values corresponding to the set of Doppler frequency values, via a communication network, (i) transmitting a downlink (DL) signal precoded at least in part on a set of Doppler frequency values and (ii) a set of weight values corresponding to the set of Doppler frequency values, The CSI report configuration message comprises timing parameters for the transmission of the set of Doppler frequency values, the set of weight values, or both the set of Doppler frequency values and the set of weight values. method.
The transmission of the DL signal is The DL precoding matrix is determined based at least partially on the set of Doppler frequency values and the set of weight values. The method according to claim 16, comprising transmitting the DL signal based at least partially on the DL precoding matrix.
The further includes transmitting a set of reference signals to the user equipment, wherein the set of reference signals corresponds to a first beam among a plurality of beams. The method according to claim 16, wherein the plurality of beams correspond to a first transmission layer among the plurality of transmission layers.
The method according to claim 18, further comprising receiving a set of delay values corresponding to the first beam, at least partially based on the set of reference signals.
The method according to claim 19, wherein each Doppler frequency value in the set of Doppler frequency values is associated with at least one delay value from the set of delay values.

Description

[0001] The techniques described below generally relate to wireless communication systems, and more specifically, to channel estimation corresponding to aged wireless channels. introduction [0002] Modern wireless communication systems frequently employ multi-antenna technology for a variety of reasons. Some examples of multi-antenna technology include beamforming, transmit diversity, and spatial multiplexing. One particular example of spatial multiplexing is a multi-input multi-output (MIMO) system, in which a multi-antenna transmitter sends signals to a multi-antenna receiver (or, in some examples, multiple single-antenna receivers). By utilizing MIMO, wireless communication systems can leverage spatial domains to increase throughput on a given channel. That is, when different spatial signatures of transmissions from differently spatially positioned antennas are combined with an analysis of the channel's multipath characteristics, multiple different data streams can be transmitted simultaneously on the same time-frequency resource. However, such MIMO systems rely on accurate channel estimates to characterize multipath channels. In many systems, channel estimates can be generated by measuring a suitable reference signal on the channel. While channel estimation can be performed using such a reference signal, the effectiveness of the estimation can be hindered by various factors (e.g., fading, channel aging, etc.). [0003] One technique to address channel aging is, for example, to generate channel estimates more frequently. However, this approach can reduce throughput by increasing overhead for reference signal transmission and channel state information (CSI) feedback. Another approach to address channel aging is to employ channel prediction and attempt to forecast channel aging. However, the effectiveness of existing channel prediction algorithms has not been optimal. For example, existing designs include channel prediction by using a finite impulse response (FIR) Wiener predictor. However, this filter is an ideal filter and cannot be implemented in practice. Another approach involves using a Kalman filter for channel prediction. While practical, this approach can still yield lower channel predictions than the ideal channel prediction. Therefore, there is room in this field for channel estimation techniques that can address channel aging in a practical way and without relying on the unrealistic assumptions mentioned above. [0004] As the demand for mobile broadband access continues to grow, research and development is advancing wireless communication technologies not only to meet the increasing demand for mobile broadband access, but also to evolve and improve the user experience through mobile communications. [0005] The following provides a simplified overview of one or more aspects of the Disclosure in order to provide a basic understanding of such aspects. This overview is not a comprehensive overview of all the features intended in the Disclosure, nor does it identify the main or important elements of all aspects of the Disclosure, nor does it define the scope of any or all aspects of the Disclosure. Its sole purpose is to provide a simplified overview of some concepts of one or more aspects of the Disclosure as an introduction to the more detailed explanations that will be presented later. Some examples may be discussed as including a particular aspect or feature, but all examples discussed may include any of the features discussed. Unless expressly stated otherwise, no aspect or feature is essential to achieving the technical effects or solutions discussed herein. [0006] In one example, a method for wireless communication by user equipment (UE) is disclosed. The method includes receiving a set of reference signals (e.g., a set of channel state information reference signals, CSI-RSs). The method further includes transmitting a set of Doppler frequency values and a set of weight values corresponding to the set of Doppler frequency values, at least in part on the set of reference signals. By utilizing a set of Doppler frequency values (e.g., Doppler frequency values weighted by a corresponding set of weight values) for wireless communication, a device receiving the set of Doppler frequency values and the corresponding weight values can accurately account for the anomalous effects of channel aging that occur when the UE is moving at a relatively high speed. This anomalous effect is known to present an increased challenge of the Doppler effect with respect to signal exchange between a fast-moving UE and a receiving device (e.g., a base station, BS). The receiving device may be configured to account for the effects of channel aging by utilizing the set of Doppler frequency values and the corresponding weight values when the receiving device transmits data or other signals to a subsequently fast-moving UE. The receiving device may be configured to transmit such signals to the UE for a predetermined amount of tim