Transmission method and terminal

A transmission method and terminal technology, applied in the communication field, can solve problems such as poor coverage performance and high PAPR, and achieve the effects of reducing power consumption, low PAPR, and improving uplink coverage

Active Publication Date: 2021-12-21
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a transmission method and a terminal to solve the problem that the existing DMRS sequence is generated by using a ZC sequence, which causes the PAPR of the DMRS symbol to be higher than the PAPR of the data symbol, resulting in poor uplink coverage performance

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  • Transmission method and terminal

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Experimental program
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Effect test

Embodiment approach 1

[0134] When the network side instructs UE that PUSCH adopts DFT-s-OFDM waveform transmission, the number of subcarriers occupied by DMRS of PUSCH is 6, the modulation mode is 8BPSK, the number of resources is 1 PRB, and when port 2 or 6 is used for transmission, DMRS of PUSCH can be based on The aforementioned scheme one is produced.

[0135] The time-domain orthogonal superposition code is [+1, +1, +1, +1, +1, +1].

[0136] DMRS ports 0 and 4 use the first frequency domain filter coefficient, DMRS ports 2 and 6 use the second frequency domain filter coefficient, and the first frequency domain filter coefficient is different from the second frequency domain filter coefficient.

[0137] In the first scheme, the orthogonal superposition code modulation has no influence on the auto-correlation and cross-correlation characteristics of the sequence.

Embodiment approach 2

[0139] When the network side instructs the UE to transmit PUSCH using DFT-s-OFDM waveform, when the number of subcarriers occupied by DMRS of PUSCH is 6, the modulation mode is 8BPSK, the number of resources is 1 PRB, and port 2 or 6 is used for transmission, the DMRS of PUSCH It can be generated based on the second scheme above.

[0140] In the second scheme, the orthogonal superposition code modulation has an influence on the autocorrelation and cross-correlation characteristics of the sequence, and the time domain is repeatedly transmitted, and the time domain block orthogonal superposition code is superimposed, and the odd or even subcarrier elements in the frequency domain are 0, which is easier to implement.

Embodiment approach 3

[0142] When the network side instructs the UE to transmit PUSCH using DFT-s-OFDM waveform, when the number of subcarriers occupied by DMRS of PUSCH is 6, the modulation mode is 8BPSK, the number of resources is 1 PRB, and port 2 or 6 is used for transmission, the DMRS of PUSCH It can be generated based on the aforementioned scheme three.

[0143] In scheme three, the time-domain orthogonal superposition code modulation has an influence on the auto-correlation and cross-correlation characteristics of the sequence.

[0144] Embodiments of the present invention have at least the following beneficial effects:

[0145] The invention can solve the problem that the PAPR of the DMRS symbol is higher than that of the data symbol when the PUSCH or PUCCH adopts transmission precoding, can improve the power amplifier efficiency of the transmitting end, reduce power consumption, improve the demodulation performance of the receiving end, and improve the uplink coverage. At the same time, t...

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Abstract

The present invention provides a transmission method and a terminal. The method includes: using at least one reference signal port among N reference signal ports to transmit a reference signal; the reference signal is generated by modulating a reference signal sequence through at least one of the following modulation methods: the first Type I modulation, first orthogonal superposition code modulation, discrete Fourier transform modulation, frequency domain filtering, second orthogonal superposition code modulation, inverse fast Fourier transform modulation, wherein N is an integer greater than 1. The PAPR of the reference signal transmitted by the present invention is relatively low, so that the power amplifier efficiency of the signal transmitting end can be improved, the power consumption can be reduced, the demodulation performance of the signal receiving end can be improved, and the uplink coverage can be improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a transmission method and a terminal. Background technique [0002] In the existing New Radio (NR) mobile communication system, when the physical uplink shared channel (PhysicalUplink Shared Channel, PUSCH) or the physical uplink control channel (Physical Uplink ControlChannel, PUCCH) adopts transmission precoding (also called DFT-s -OFDM waveform), the demodulation reference signal (Demodulation Reference Signal, DMRS) sequence is generated using a low peak-to-average power ratio (Peak-to-Average Power Ratio, PAPR) sequence (also known as a ZC sequence), resulting in DMRS symbols The PAPR is higher than that of the data symbols, resulting in poor uplink coverage performance. Contents of the invention [0003] Embodiments of the present invention provide a transmission method and a terminal to solve the problem that the existing DMRS sequenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/261H04L27/2613H04L27/262H04L27/26
Inventor 贺子健孙晓东王勇
Owner VIVO MOBILE COMM CO LTD
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