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PDP estimation method and system in N based on TRS

An estimation value and algorithm technology, applied in baseband system components, multi-frequency code system, etc., can solve problems such as poor robustness, high complexity of window length search, poor performance, etc., to achieve enhanced robustness , improve accuracy and reduce complexity

Active Publication Date: 2021-06-01
上海微波技术研究所(中国电子科技集团公司第五十研究所)
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Problems solved by technology

[0016] Through the above steps, it can be seen that its main shortcomings are: 1. There are empirical values ​​such as preset thresholds, and the robustness is not strong; 2. The search complexity of the window length is very high; 3. It is greatly affected by non-ideal factors. In this case The performance is not very good

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  • PDP estimation method and system in N based on TRS
  • PDP estimation method and system in N based on TRS
  • PDP estimation method and system in N based on TRS

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[0060] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0061] The embodiment of the present invention provides a TRS-based PDP estimation method in NR. The PDP estimation using the compressed sensing algorithm can overcome the aforementioned shortcomings. Compressed sensing:

[0062] The principle of compressed sensing is that there is an Nx1-dimensional signal x, and an Mx1-dimensional observation vector y, M<<N, satisfying:

[0063] y=Πx

[0064]Among them, the dimension of observation matrix Π is M×N. x is non-sparse, but in the transform domain Φ is s...

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Abstract

The invention provides a PDP estimation method and system in NR based on a TRS, and relates to the technical field of power delay spectrum estimation, and the method comprises the steps: 1, obtaining a frequency domain channel estimation value according to a system instruction; 2, after the frequency domain channel estimation value is obtained, obtaining an observation matrix pi; 3, taking the N-dimensional DFT matrix as a sparse matrix, and obtaining a specific multipath position and multipath power through a compressed sensing algorithm, thereby obtaining accurate PDP estimation; 4, after the observation matrix II is selected in the step 2, the observation matrix II can be obtained by the rest pilot frequencies through the random generation method again, repeating the step 2 and the step 3 again, obtaining PDP estimation, two estimation results being averaged, and obtaining a better estimation result; finally, an observation matrix II is selected in the fourth step, and the PDP estimation frequency is determined according to performance requirements. According to the method, the accuracy of PDP estimation can be improved, the robustness is higher, and the complexity is reduced.

Description

technical field [0001] The present invention relates to the technical field of power delay spectrum estimation, in particular to a TRS-based PDP estimation method and system in NR. Background technique [0002] In NR downlink communication based on Orthogonal Frequency Division Multiplexing (OFDM), the estimation of channel state information is very important. [0003] Based on the sparse characteristics of the channel, using the TRS signal distributed in the full bandwidth of the NR system, the compressed sensing algorithm can be used to estimate the accurate channel power delay spectrum, so as to obtain the frequency domain correlation information through Fourier transform for frequency domain filtering and frequency domain channel estimation with excellent performance. [0004] The relationship between PDP and frequency domain correlation is briefly described below. [0005] PDP and frequency domain correlation: [0006] According to the 3GPP TS 38.101-4 agreement, the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/02H04L27/26
Inventor 王志旭
Owner 上海微波技术研究所(中国电子科技集团公司第五十研究所)
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