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Multi-parameter joint estimation method and device

A joint estimation and multi-parameter technology, applied to multi-frequency code systems, baseband system components, etc., can solve problems such as time offset, and achieve the effect of improving performance and demodulation performance

Inactive Publication Date: 2017-12-08
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there may be a timing offset Δt between the serving cell (TP#1) and the PDSCH cell (TP#2)

Method used

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  • Multi-parameter joint estimation method and device
  • Multi-parameter joint estimation method and device

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Experimental program
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Embodiment 1

[0038] An embodiment of the present invention provides a multi-parameter joint estimation device. figure 2 is a schematic diagram of the device, please refer to figure 2 , the device includes: a channel estimation unit 21, an inverse fast Fourier transform (IFFT, Inverse Fast FourierTransform) unit 22, a signal power calculation unit 23, and a joint estimation unit 24, wherein,

[0039] The channel estimation unit 21 uses the locally generated CSI-RS to perform channel estimation on the received signal to obtain channel state information of the received signal.

[0040] Wherein, the apparatus of this embodiment may further include a CSI-RS replica generation unit to generate a CSI-RS, so as to provide the channel estimation unit 21 of this embodiment to perform channel estimation accordingly. Wherein, the manner in which the CSI-RS replica generating unit generates the CSI-RS replica can be realized by existing means, and will not be repeated here.

[0041] Wherein, this e...

Embodiment 2

[0053] The embodiment of the present invention also provides a multi-parameter joint estimation device. image 3 is a schematic diagram of the device, please refer to image 3 Different from the multi-parameter joint estimation device in Embodiment 1, in this embodiment, the multi-parameter joint estimation device includes a channel estimation unit 31, an inverse fast Fourier transform (IFFT) unit 32, and a signal power calculation unit 33. In addition to the joint estimation unit 34, it also includes: a window addition unit 35 and a zero padding unit 36, wherein,

[0054] Window adding section 35 adds a window function to the channel state information of the received signal estimated by channel estimating section 31 .

[0055] Wherein, in order to reduce power leakage caused by adding virtual subcarriers, in this embodiment, the channel estimation result of the channel estimation unit 31 may be multiplied by a certain window function. This embodiment does not limit the wind...

Embodiment 3

[0060] The embodiment of the present invention also provides a multi-parameter joint estimation device. In this embodiment, the composition of the multi-parameter joint estimation device is the same as that in Embodiment 1 or Embodiment 2. In addition, in this embodiment, the joint estimation unit 24 / 34 specifically uses the signal power sampling value in the time window in the time domain to estimate the time offset and delay spread, and uses the noise power in the time domain to estimate the noise in the window The power samples estimate the noise power. It may include: a time offset estimation module 41 , a delay spread estimation module 42 , and a noise power estimation module 43 . Figure 4 is a schematic diagram of the composition of the joint estimation unit 24 / 34, please refer to Figure 4 .

[0061] In one implementation of the time offset estimation module 41, the time offset estimation module 41 first applies a cyclic shift to move the signal power samples togeth...

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Abstract

Embodiments of the present invention provide a multi-parameter joint estimation method and device, wherein the device includes: a channel estimation unit, which uses a locally generated channel state information reference signal (CSI-RS) to perform channel estimation on the received signal, and obtains the The channel state information of the received signal; the inverse fast Fourier transform unit, which transforms the channel state information from the frequency domain to the time domain; the signal power calculation unit, which calculates the signal power of the channel state information on the time domain; An estimating unit that estimates the time offset, delay spread and noise power of the received signal by using the signal power of the channel state information in the time domain. Through the multi-parameter joint estimation method and device of the embodiment of the present invention, multiple parameters including time offset, delay spread and noise power are jointly estimated, which improves the demodulation of the PDSCH of the R11UE configured as QCL type B Performance, improved data throughput performance.

Description

technical field [0001] The present invention relates to wireless communication, in particular to a multi-parameter joint estimation method and device. Background technique [0002] In the R11 (Release11, version 11) of the LTE-A (Long Term Evolution-Advanced, enhanced long-term evolution) system, in order to support the coordinated multi-point (CoMP, Coordinate Multipoint) transmission in TM10 (Transmission Mode10, transmission mode 10) , defines the quasi co-location (quasi co-location, QCL) between various antenna ports. For the serving cell, the UE (User Equipment, user equipment, referred to as user for short) configured in TM10 is configured as one of the following two QCL types. [0003] Type A, CRS (Common Reference Signal, Common Reference Signal), CSI-RS (Channel State Information Reference Signals, Channel State Information Reference Signals), and DM-RS ( DeModulation ReferenceSignal, demodulation reference signal) can be assumed as a quasi-colocation with respec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 王晓琴王昕
Owner FUJITSU LTD