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Method and apparatus for transmiting demodulation reference signal

A technology for demodulating reference signals and data signals, applied in the field of devices and methods for sending demodulation reference signals, capable of solving problems such as large overhead

Active Publication Date: 2021-03-23
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

DMRS with orthogonal resources can lead to large overhead

Method used

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  • Method and apparatus for transmiting demodulation reference signal
  • Method and apparatus for transmiting demodulation reference signal
  • Method and apparatus for transmiting demodulation reference signal

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Embodiment Construction

[0043] Hereinafter, the principle and spirit of the present disclosure will be described with reference to the illustrative embodiments. It should be understood that all these embodiments are provided only for those skilled in the art to better understand and further practice the present invention, rather than to limit the scope of the present invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. In the interest of clarity, not all features of an actual implementation are described in this specification.

[0044] References in the specification to "one embodiment," "an embodiment," "example embodiment," etc. mean that the described embodiment can include a particular feature, structure, or characteristic, but that not every embodiment necessarily includes the particular feature, structure, or characteristic. feature, structure or characteristic. Also such phrases are not ne...

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Abstract

Embodiments of the present disclosure provide apparatus, methods and computer readable storage medium for transmission of a demodulation reference signal in a multi-user multiple-input multiple-output(MIMO) system. A transmitting apparatus comprises a first precoder configured to perform a non-linear precoding operation on a plurality of streams of data signals addressed to a plurality of receiving apparatus; and a second precoder configured to perform a linear precoding operation on respective demodulation reference signals for the plurality of streams of data signals. The second precoder isconfigured to perform a feedback filtering operation with a same feedback filter as the first precoder, and perform a feedforward filtering operation with a same feedforward filter as the first precoder. The second precoder is further configured to add tilting phases to the respective demodulation reference signals in the feedback filtering operation.

Description

technical field [0001] The non-limiting and exemplary embodiments of the present disclosure relate generally to signal transmission in a multi-user multiple-input multiple-output (MIMO) system, and in particular to a method, apparatus for a precoding process of a demodulation reference signal (DMRS) and computer readable storage media. Background technique [0002] Nonlinear precoding has been considered as a promising interference cancellation technique for New Radio (NR) systems. For example, with full channel state information (CSI) at the transmitter end, relying on "dirty paper" coding (DPC) techniques that pre-subtract non-causally known interference can achieve the maximum sum rate of the system and provide maximum The diversity order of . Tomlinson-Harashima precoding (THP) is a simplified and efficient version of DPC that is less computationally demanding and thus more attractive for practical implementations. Nonlinear precoding, such as THP, can provide signifi...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04B7/0413
CPCH04B7/0413H04L25/023H04L25/022
Inventor 宋暖
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD