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A wireless signal modulation method based on codebook mapping

A technology of wireless signal and modulation method, applied in radio transmission system, space transmit diversity, diversity/multi-antenna system, etc., can solve the problem of no time-frequency point set mapping relationship, etc., to avoid adjacent channel interference, reduce complexity, Effects with low complexity

Inactive Publication Date: 2019-07-02
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the set of time-frequency points does not carry any bit sequence, that is, there is no mapping relationship between the set of time-frequency points and bit modulation, but the OFDM modulation method is used

Method used

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  • A wireless signal modulation method based on codebook mapping
  • A wireless signal modulation method based on codebook mapping
  • A wireless signal modulation method based on codebook mapping

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Embodiment Construction

[0033] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] In one embodiment of the present invention, the time-frequency modulation problem in LTE (including but not limited to TD-LTE and FDD-LTE) system is mainly considered. However, it goes without saying that the technical idea provided by the present invention can also be applied to other wireless communication systems using MIMO technology, such as MIMO-OFDM, WCDMA or HSDPA.

[0035] As we all know, time and frequency are basic units (resource elements) constituting a resource grid in an LTE system. On this basis, the inventor proposes to extend the traditional digital modulation to a method of modulating in a two-dimensional space composed of time and frequency. The specific implementation idea is as follows: the base station and the user equipment (the base station and the user equipment act as wireles...

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Abstract

The invention discloses a wireless signal modulation method based on codebook mapping. The wireless signal modulation method comprises steps: a transmission terminal and a reception terminal commonly determine a quantity of time frequency points for transmitting a bit sequence; before transmission, the transmission terminal divides the bit sequence into a first bit sequence and a second bit sequence; during transmission, the transmission terminal maps the first bit sequence to a corresponding time frequency point according to a codebook and performs digital modulation on the second time bit sequence on the time frequency point. The wireless signal modulation method introduces a time-frequency two-dimension resource to map the bit sequence to selection of the time frequency points, which greatly reduces the complexity and dramatically improves the utilization efficiency of the network frequency spectrum.

Description

technical field [0001] The invention relates to a wireless signal modulation method, in particular to a codebook mapping-based wireless signal modulation method, and belongs to the technical field of wireless communication. Background technique [0002] In a wireless communication system, in order to transmit a digital signal in a high-frequency channel with limited bandwidth, it is necessary to carry out carrier modulation on the digital signal. The baseband signal is the original electrical signal, generally refers to the basic signal waveform, and refers to the corresponding electrical pulse in digital communication. Digital modulation moves the baseband digital signal to a high frequency band that is more suitable for transmission, and at the same time loads digital information on a certain parameter of the high frequency carrier, thereby realizing signal regeneration at the receiving end. Compared with analog modulation, digital modulation has the advantages of strong ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04B7/06
CPCH04B7/0639H04L1/0612H04L1/0625
Inventor 于巧玲朱元萍王江徐景
Owner SHANGHAI RES CENT FOR WIRELESS COMM