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Systems and methods for mapping dmrs configuration to phase noise tracking pilot for improved receiver performance

A phase noise and receiver technology, applied in multi-frequency code systems, FM carrier systems, transmission systems, etc., can solve problems such as high overhead and achieve the effect of reducing overhead

Active Publication Date: 2018-09-28
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if the same signal is used for demodulation and phase noise tracking, it may incur unnecessarily high overhead

Method used

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  • Systems and methods for mapping dmrs configuration to phase noise tracking pilot for improved receiver performance
  • Systems and methods for mapping dmrs configuration to phase noise tracking pilot for improved receiver performance
  • Systems and methods for mapping dmrs configuration to phase noise tracking pilot for improved receiver performance

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Embodiment Construction

[0042] According to some embodiments, how the PNT-RS is beamformed relative to the DMRS may be signaled implicitly or explicitly. For example, a Phase Noise Tracking Reference Signal (PNT-RS) may be mapped to at least one specific port on the DMRS. For example, in certain embodiments, a phase noise tracking reference signal may be mapped to the first DMRS port. Therefore, the receiver can know that the channel estimate of the effective channel of the DMRS port represents the effective channel for transmitting the PNT-RS. This enables the receiver and corresponding transmitter to optimize the beamforming of the ports for good reception at the receiver. In some embodiments, receivers can take advantage of this optimized beamforming, since DMRS for different users / layers are orthogonal and have higher processing gain than PNT-RS, which is transmitted at low density To avoid excessive overhead, and may require independent estimates in each OFDM symbol in some embodiments.

[00...

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Abstract

According to certain embodiments, user equipment (810) is provided for use in a cellular network. The user equipment (810) may include a transceiver (910), a processor (920), and a memory (930). The user equipment (810) may be configured to acquire a Demodulation Reference Signal (DMRS) configuration. A mapping is determined from the DMRS configuration to a phase noise tracking reference signal (PNT-RS). A channel estimate is performed using the DMRS configuration. Phase noise estimation and compensation is performed based on the PNT-RS by using the mapping and the channel estimate.

Description

[0001] priority [0002] This application claims priority to U.S. Patent Provisional Application No. 62 / 292,921, entitled "Systems and Methods for Mapping DMRSConfiguration to Phase Noise Tracking Pilot for Improved receiver Performance," filed February 9, 2017, the disclosure of which is incorporated by reference here. technical field [0003] The present disclosure relates generally to wireless communications, and more particularly, to mapping DMRS configurations to phase noise tracking pilots in order to improve receiver performance. Background technique [0004] Communication between a transmitter and receiver typically requires some form of time synchronization and / or frequency synchronization before message transmissions can be reliably received. In a cellular system such as Long Term Evolution (LTE), a base station periodically broadcasts a narrowband synchronization signal in time, and a wireless device accessing the system can perform an initial cell search from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L27/14H04L27/26
CPCH04L5/0007H04L27/2613H04L27/2675H04L5/0051H04L25/0224H04L27/2695H04L5/00H04L25/0226H04L27/266
Inventor M·赫斯勒R·巴尔德梅尔H·萨林L·林德博姆
Owner TELEFON AB LM ERICSSON (PUBL)