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Signal sending and receiving method and device thereof

A technology of signal transmission and signal reception, applied in the field of communication, can solve problems such as poor cross-correlation, large signal interference, and affecting channel estimation performance

Active Publication Date: 2020-07-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the complete Gold sequence has good cross-correlation properties, the downlink DMRS in the NR system uses only Gold sequence fragments, and the cross-correlation between Gold sequence fragments is poor, which will lead to relatively low interference between signals. Large, affecting channel estimation performance

Method used

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  • Signal sending and receiving method and device thereof
  • Signal sending and receiving method and device thereof
  • Signal sending and receiving method and device thereof

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Embodiment Construction

[0152] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0153] "One" in the embodiments of this application means a single individual, and does not mean that it can only be one individual and cannot be applied to other individuals. For example, "a terminal device" in the embodiment of the present application refers to a certain terminal device, and does not mean that it can only be applied to a specific terminal device. In this application, the term "system" and "network" can be used interchangeably.

[0154] References in this application to "one embodiment" (or "an implementation") or "an embodiment" (or "an implementation") mean that a particular feature, structure, characteristic, etc. described in conjunction with an embodiment is included in at least one embodiment . ...

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Abstract

The invention relates to a signal sending and receiving method and a device thereof. Wherein the part, carried by a first signal, on a kth subcarrier in an ith subcarrier group in the N subcarrier groups is one of the listed sequences, and the related sequence is one of the listed sequences; the listed sequences are sequences with better cross correlation, so that for the two subcarrier groups, aslong as two of the listed sequences are selected, the better cross correlation between the signals borne by the two subcarrier groups can be ensured, the interference between the signals can be reduced, and the channel estimation performance is improved.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a signal sending and receiving method and device. Background technique [0002] In the new air interface (new radio, NR) system, the downlink demodulation reference signal (demodulation reference signal, DMRS) uses a sequence obtained based on the Gold sequence, which is modulated by quadrature phase shift keying (quadraturephase shift keyin, QPSK) After that, it is mapped to frequency domain subcarriers. Taking the physical downlink control channel (PDCCH) as an example, the sequence {c(n)} used by DMRS is composed of (2 31 -1) The Gold sequence is intercepted and obtained, wherein the initialization value of the Gold sequence is the identifier (identifier, ID) (or ID of the cell) of the DMRS scrambling code of the terminal device, the subframe number of the subframe where the DMRS is located, and the OFDM symbol Determined by the position and other factor...

Claims

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Application Information

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IPC IPC(8): H04L27/36H04L27/38H04J13/00
CPCH04L27/38H04L27/362H04J13/004H04L5/0007H04L5/0048H04L5/0053H04L27/2613H04L27/26134H04L27/26035H04L27/2634H04J13/0022H04J2013/0037H04J11/00H04J2011/0009H04L27/26025H04J13/0062H04L5/0094H04L25/0226
Inventor 龚名新曲秉玉周永行
Owner HUAWEI TECH CO LTD
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