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Uplink channel estimation method and device based on 5g NR system

A channel estimation and 5GNR technology, applied in the field of uplink channel estimation based on 5GNR system, can solve the problems of inaccurate uplink channel estimation and poor real-time performance, and achieve the effect of reducing the amount of calculation and improving the accuracy

Active Publication Date: 2022-04-29
武汉信科移动通信技术有限公司
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  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems of poor real-time performance and inaccurate uplink channel estimation of the existing uplink channel estimation methods described above or at least partially solve the above problems, embodiments of the present invention provide a 5G NR system-based uplink channel estimation method and device

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  • Uplink channel estimation method and device based on 5g NR system
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  • Uplink channel estimation method and device based on 5g NR system

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Embodiment Construction

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

[0049] Before this embodiment, since this embodiment is closely related to the existing LMMSE channel estimation method, in order to describe the idea and method of this embodiment in detail, the existing LMMSE channel estimation method will be introduced in detail first.

[0050] Assume that the signal received by the receiver is represented by FFT (Fast Fourier Transform, Fast Fourier Transform):

[0051] Y(n,k)=X(n,k)H(n,k)+W(n,k) (1)

[0052] Among them, n represents the index of the OFDM symbol, k re...

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Abstract

The present invention provides a method and device for estimating an uplink channel based on a 5G NR system. The method includes: acquiring an uplink waveform of the 5G NR system, and if the uplink waveform is a CP-OFDM waveform, calculating the SRS signal according to the received SRS signal frequency domain correlation value and SNR value; according to the frequency domain correlation value and SNR value of the SRS signal, obtain the real-time filter coefficient in the LMMSE channel estimation method; according to the real-time filter coefficient, based on the LMMSE channel estimation method for the The uplink channel of the 5G NR system is estimated. The invention improves the accuracy of channel estimation and reduces the calculation amount of PUSCH channel estimation.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to an uplink channel estimation method and device based on a 5G NR system. Background technique [0002] 5G, as the fifth generation of mobile communication technology, has higher speed, lower latency and denser connections than 4G. As a typical representative of multi-carrier technology, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has been widely used in 4G. In 5G NR (New Radio) design, OFDM is still the basic waveform. In the design of NR, both the uplink and downlink support CP-OFDM (cyclic prefix-orthogonal frequency division multiplexing), which means that the uplink and downlink use the same waveform. When mutual interference occurs between the uplink and downlink, more advanced receivers are used for interference. Elimination offers the possibility. At the same time, for uplink transmissi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/0224H04L25/025H04L27/2601
Inventor 倪霞杨新玲李辉
Owner 武汉信科移动通信技术有限公司