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Mobile terminal uplink signal generation method and device

A mobile terminal and signal generation technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problem of high power consumption of mobile terminals, and achieve the effect of avoiding large power consumption

Active Publication Date: 2019-08-09
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention solves the problem of how to reduce the power consumption of the mobile terminal caused by the IFFT transformation

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  • Mobile terminal uplink signal generation method and device
  • Mobile terminal uplink signal generation method and device

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Embodiment Construction

[0032] In the prior art, according to the current communication protocol, the bandwidth configured by the LTE system is related to the number of IFFT points. When the LTE system bandwidth is configured as a large broadband scenario, an IFFT transformation corresponding to a large number of points is performed during the uplink signal generation process. For example, if the bandwidth of the LTE system is configured as 20 MHz, then in the process of generating the uplink signal, 2048 IFFT transformations need to be performed. However, when the LTE system bandwidth is configured to 20MHz, only a small amount of frequency domain resources will be allocated to the Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH), and the Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) each Only one resource block (Resource Block, RB) is allocated to the time domain symbol.

[0033] In this case, since the LTE system bandwidth is configured as 20 MHz, ...

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Abstract

The invention relates to a mobile terminal uplink signal generation method and device. The method includes the following steps that: the number of consecutive resource blocks to be transmitted is obtained; output signals which have been subjected to discrete Fourier transformation are mapped onto N subcarriers, wherein N is corresponding to the number of the consecutive resource blocks to be transmitted; N-point IFFT (inverse fast Fourier transformation) is performed on the N subcarriers, so that time-domain signals can be obtained; a cyclic prefix is interpolated into the time-domain signals; up-sampling is performed on the cyclic prefix-interpolated time-domain signals, so that the sampling rate of the cyclic prefix-interpolated time-domain signals is made to be equal to a sampling rate corresponding to system bandwidth currently configured for a mobile terminal; and phase rotation is performed on the up-sampled time-domain signals, so that uplink signals can be generated. With the above method and device adopted, the number of IFFT points can be effectively decreased, so that the power consumption of the LTE mobile terminal can be decreased.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for generating an uplink signal of a mobile terminal. Background technique [0002] Long Term Evolution (LTE) is a long-term evolution of the general mobile communication system technology led by the 3rd Generation Partnership Project (3GPP), and is currently a widely recognized wireless communication technology. [0003] In the existing LTE system, the carrier bandwidth usually includes 20MHz, 15MHz, 10MHz, 5MHz, 3MHz, and 1.4MHz. In existing communication protocols, there are corresponding Inverse Fast Fourier Transform (IFFT) points for different carrier bandwidths. For example, when the carrier bandwidth is 20MHz, the corresponding IFFT points are 2048, and when the carrier bandwidth is 10MHz, the corresponding IFFT The number of points is 1024. [0004] When the LTE system bandwidth is configured as a large broadband scenario, an IFFT trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2628
Inventor 李俊强戴秉乾黄宗治
Owner SPREADTRUM COMM (SHANGHAI) CO LTD