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CSI acquisition method with channel reciprocity in mobile communications

A channel state information and channel technology, applied in wireless communication, diversity/multi-antenna systems, electrical components, etc., can solve problems such as unusable base stations and difficult noise power estimation

Active Publication Date: 2019-03-01
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is difficult for the base station to correctly estimate the noise power on the UE side
Specifically, the base station cannot use the channel quality indicator (CQI) obtained from the full channel state information to obtain the noise power at the UE side, because one of the two channels is unknown

Method used

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  • CSI acquisition method with channel reciprocity in mobile communications
  • CSI acquisition method with channel reciprocity in mobile communications
  • CSI acquisition method with channel reciprocity in mobile communications

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Embodiment Construction

[0023] This disclosure discloses detailed embodiments and implementations of the claimed subject matter. It is to be understood, however, that the disclosed embodiments and implementations are merely illustrative of the claimed subject matter, which can be embodied in various forms. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that this description of the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the following description, details of known features and / or techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations.

[0024] overview

[0025] Implementations according to the present invention relate to various techniques, methods, schemes and / ...

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Abstract

A user equipment (UE) utilizes a first group of antenna ports at the UE for transmitting and receiving while utilizing a second group of antenna ports for receiving but not transmitting. The UE transmits to a base station (BS) a sounding reference signal (SRS) via the first group of antenna ports through a first channel of a communication link between the UE and the BS. The UE receives from the BSa channel state information reference signal (CSI-RS) via the first and second groups of antenna ports through the first channel and a second channel of the communication link. The UE determines an estimated channel response and a matrix such that a product of the matrix and a channel response of the first channel approximates a channel response of the second channel. The UE transmits to the BS aCSI feedback indicating at least the matrix.

Description

[0001] Cross references to related patent applications [0002] This application claims the benefit of priority to U.S. Provisional Patent Applications 62 / 476,675 and 62 / 479,349, filed March 24, 2017, and March 31, 2017, respectively, the contents of which are incorporated by reference in their entirety. technical field [0003] The present invention relates generally to mobile communications, and more particularly to channel state information (CSI) acquisition utilizing channel reciprocity in mobile communications. Background technique [0004] Unless otherwise indicated herein, the approaches described in this section are not prior art to the claims listed below and are not admitted to be prior art by inclusion in this section. [0005] In wireless communications, CSI refers to information about known channel characteristics of a communication link with multiple channels. CSI generally describes how a signal propagates from a transmitter (transmitter, Tx) to a receiver (r...

Claims

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Application Information

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IPC IPC(8): H04B7/0404H04B7/0408
CPCH04B7/10H04B7/063H04B7/0632H04B7/0639H04B7/0695H04B7/0691H04B7/0456H04B7/0469H04B7/0617H04B7/0626H04W88/08
Inventor 杨维东蔡隆盛
Owner MEDIATEK INC
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