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A method and device for generating an OFDM baseband signal

A baseband signal and symbol technology, applied in the field of communication, can solve problems such as phase deviation of OFDM baseband signals, and achieve the effect of avoiding phase deviation and improving efficiency

Active Publication Date: 2021-06-04
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for generating OFDM baseband signals to solve the problem of phase deviation existing in existing OFDM baseband signals

Method used

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  • A method and device for generating an OFDM baseband signal
  • A method and device for generating an OFDM baseband signal
  • A method and device for generating an OFDM baseband signal

Examples

Experimental program
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Effect test

example 1

[0095] Example 1: If the first frequency f 1 μ For sending the center frequency (i.e. μ=0) of the resource grid of the OFDM baseband signal of 15kHz, the second frequency f 2 is the center frequency of the first carrier, then Specifically, it is used to compensate the frequency difference between the center frequency of the resource grid with a subcarrier spacing of 15 kHz and the center frequency of the first carrier.

example 2

[0096] Example 2: If the first frequency f 1 μ For sending the center frequency of the resource of the OFDM baseband signal of the SSB of 30kHz (ie μ=1), the second frequency f 2 is the center frequency of the first carrier, then Specifically, it is used to compensate the frequency difference between the center frequency of the resource with a subcarrier interval of 30 kHz and the center frequency of the first carrier.

[0097] In another possible example, for PRACH OFDM baseband signal generation, the above-mentioned phase offset Used to compensate the first frequency f 1 μ and the second frequency f 2 the frequency difference between them.

example 3

[0098] Example 3: If the first frequency f 1 μ For sending the center frequency (ie μ=0) of the resource grid of the 15kHz subcarrier spacing of the OFDM baseband signal of the PRACH, the second frequency f 2 is the center frequency of the first carrier, then Specifically, it is used to compensate the frequency difference between the center frequency of the resource grid with a subcarrier spacing of 15 kHz and the center frequency of the first carrier.

[0099] S203. The transmitting end device generates a first OFDM baseband signal according to the phase offset and the data symbol of the resource element carried on the first OFDM symbol.

[0100] Exemplarily, in the embodiment of the present invention, when the transmitting end device generates the first OFDM baseband signal, it can be implemented in the following two implementation manners:

[0101] First possible implementation:

[0102] In this implementation manner, the transmitting end device can directly perform ph...

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Abstract

Embodiments of the present invention provide a method and device for generating OFDM baseband signals, which relate to the communication field and are used to solve the problem of phase deviation existing in existing OFDM baseband signals. The method includes: obtaining a difference between a first frequency and a second frequency; wherein, the first frequency is a center frequency of a frequency bandwidth of a common resource block in a first resource set, and the first resource set is mapped on M OFDM symbols, An OFDM symbol corresponds to an OFDM baseband signal, and the first OFDM baseband signal is an OFDM baseband signal corresponding to the first OFDM symbol in the M OFDM baseband signals; according to the time domain information corresponding to the difference and the first OFDM symbol, determine the first A phase offset corresponding to the OFDM baseband signal; generating the first OFDM baseband signal according to the phase offset and the data symbols of the resource elements carried on the first OFDM symbol.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for generating an Orthogonal Frequency Division Multiplexing (OFDM) baseband signal. Background technique [0002] Currently, in the 5G NR system, the subcarrier spacing SCS (subcarrier spacing) of the common resource block (Common RB) carried on the carrier can be set to 15*(2^n)kHz, where n can be a negative number. That is to say, in the NR system, the SCS can be set to: 3.75kHz, 7.5kHz, 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, etc. At the same time, the existing 5G NR system supports simultaneous transmission of OFDM baseband signals of different SCSs in the same carrier, that is, resources of different SCSs will be deployed on the same carrier. [0003] However, since the SCSs of multiple resources deployed on the same carrier do not completely present an integer multiple relationship, therefore, the center frequencies of resources of differ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/0014H04L27/2602H04L2027/0026
Inventor 吴凯刘思綦
Owner VIVO MOBILE COMM CO LTD
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