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Method and device for estimating frequency-domain channel correlation value of a channel

A frequency-domain channel and correlation value technology, which is applied in channel estimation, transmission monitoring, baseband system components, etc., can solve the problem of inaccurate frequency domain channel correlation value estimation and achieve the effect of increasing the processing burden

Active Publication Date: 2022-04-05
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a method and device for estimating frequency-domain channel correlation value of a channel, which is used to solve the problem of the frequency domain when the receiving end lags behind or receives a transmission signal in advance in the frequency-domain channel correlation value estimation method in the prior art. The problem of inaccurate estimation of domain channel correlation value

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  • Method and device for estimating frequency-domain channel correlation value of a channel
  • Method and device for estimating frequency-domain channel correlation value of a channel
  • Method and device for estimating frequency-domain channel correlation value of a channel

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Embodiment 1

[0045] Such as Figure 3A As shown, the present embodiment provides a method for estimating a frequency-domain channel correlation value of a channel, which specifically includes the following steps:

[0046] Step 301, obtaining the estimated value of the power delay distribution PDP corresponding to the transmission signal during multi-channel transmission;

[0047] Optionally, in implementation, channel estimation is carried out to transmission signal in multi-channel transmission by least square method LS, obtain the channel gain at the position of reference signal RS in transmission signal;

[0048] After inverse Fourier transform is performed on the channel gain, the square of the norm is taken to obtain the estimated value of the PDP.

[0049] Step 302, according to the relationship between the power value and the time delay in the above-mentioned PDP estimated value, determine the time delay point for zero filling of the power value according to the preset rules, and f...

Embodiment 2

[0075] Such as Figure 4 As shown, based on the same inventive concept, an embodiment of the present invention provides a first device for estimating a frequency-domain channel correlation value of a channel. The device includes a processor 401 and a memory 402, wherein the above-mentioned processor is used for:

[0076] Obtain the estimated value of the power delay distribution PDP corresponding to the transmission signal during multi-channel transmission;

[0077] According to the relationship between the power value and the time delay in the above-mentioned PDP estimated value, determine the time delay point of power value zero padding according to preset rules, and the power value zero padding at the above-mentioned time delay point determined;

[0078] Fourier transform is performed on the PDP sequence obtained after the above zero padding to obtain a channel correlation value in the frequency domain.

[0079] Optionally, the above-mentioned processor is specifically con...

Embodiment 3

[0087] Such as Figure 5 As shown, based on the same inventive concept, an embodiment of the present invention provides a device for estimating a frequency-domain channel correlation value of a channel, the device comprising:

[0088] PDP estimated value obtaining unit 510, for obtaining the corresponding power delay distribution PDP estimated value of transmission signal when multi-channel transmission;

[0089] The PDP sequence processing unit 520 is configured to, according to the relationship between the power value and the time delay in the above-mentioned PDP estimated value, determine the time delay point at which the power value is filled with zeros according to preset rules, and fill the power value with zeros at the above-mentioned determined time delay point ;

[0090] The frequency domain correlation value acquisition unit 530 is used to perform Fourier transform on the PDP sequence obtained after the above-mentioned zero padding to obtain the frequency domain cha...

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Abstract

The invention discloses a method and equipment for estimating frequency-domain channel correlation values ​​of a channel, which relate to the technical field of wireless communication and are used to solve the problem that in the existing frequency-domain channel correlation value estimation methods, the receiving end lags behind or receives transmission signals in advance , the problem of inaccurate estimation of channel correlation values ​​in the frequency domain, the method of the present invention includes: obtaining the estimated value of the power delay distribution PDP corresponding to the transmission signal during multi-channel transmission, and according to the power value and time delay in the estimated PDP value According to the preset rules, determine the time delay point for zero padding of the power value, and fill the power value with zero at the determined time delay point, and perform Fourier transform on the PDP sequence obtained after the zero padding to obtain the frequency Domain channel correlation value, since the time delay point of the rate value zero padding in the present invention is determined according to the PDP estimated value, therefore performing Fourier transform on the PDP sequence obtained after zero padding can obtain accurate frequency domain channel correlation value.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and equipment for estimating frequency-domain channel correlation values ​​of channels. Background technique [0002] The wireless channel has great randomness, which will cause the distortion of the transmission signal amplitude, phase and frequency, and generate inter-symbol interference, etc., which restricts the performance of the mobile communication system and poses a great challenge to the design of the receiving end. If the receiving end can effectively estimate the channel, it can make full use of the channel information and improve the performance of the system in many aspects. When estimating the channel, the channel correlation value in the frequency domain between channels is often used. According to the minimum mean square error (Minimum Mean Squared Error, MMSE) for channel estimation. [0003] In the channel estimation under the Po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H04L25/02
CPCH04B17/382H04L25/0202
Inventor 金晓成余作奔
Owner DATANG MOBILE COMM EQUIP CO LTD
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