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Data sending method, data restoring method and device

A data transmission method and data technology, applied in the field of communication, can solve the problems of low reliability of the data transmission method, and achieve the effect of solving low reliability and good frequency diversity effect

Inactive Publication Date: 2013-02-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a data sending method, restoration method and device to at least solve the problem of relatively low reliability of the above-mentioned data sending methods

Method used

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  • Data sending method, data restoring method and device
  • Data sending method, data restoring method and device
  • Data sending method, data restoring method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a method for sending data, which can be implemented on any sending device. Such as figure 1 As shown, the method includes the following steps (step S102 to step S108):

[0034] Step S102, modulating the data to be transmitted to obtain a modulation symbol; wherein, the modulation symbol is represented by two components of I and Q;

[0035] Wherein, the modulation method adopted in this embodiment refers to complex frequency domain digital baseband modulation methods such as QPSK (Quadrature Phase Shift Keying), 16QAM, 64QAM, 256QAM;

[0036] Step S104, mapping the modulation symbols on the first specified subcarrier segment;

[0037] Step S106, mapping the modulation symbols to the second designated subcarrier segment after I and Q path swapping;

[0038] For example, N modulated symbols are sequentially mapped to N subcarrier segments; each of the N modulated symbols is mapped to another M subcarrier segments after I and Q path swapping, whe...

example 1

[0053] Such as image 3 As shown, in this example there are modulated symbols N d / 2, where N d is the number of data subcarriers contained in each OFDM (Orthogonal Frequency Division Multiplex) symbol, the modulation method is QPSK modulation, and the first modulation symbol is a 1 +b 1 i, the second modulation symbol is a 2 +b 2 i, correspondingly until the Nth d / 2 modulation symbols.

[0054] put this N d / 2 modulated symbols in [1, N d / 2] The subcarrier segment is directly mapped, specifically, the first modulation symbol is mapped to the first subcarrier of the positive frequency, and the second modulation symbol is mapped to the second subcarrier of the positive frequency. According to this method, N d / 2 modulation symbols are mapped to 1 to N respectively d / 2 subcarriers.

[0055] N d / 2 modulated symbols do I, Q channel swap and then map [-N d / 2, -1] subcarrier segment, specifically the first modulation symbol a 1 +b 1 i performs the I and Q road int...

example 2

[0056] Example 2 as Figure 4 As shown, there are modulated symbols N d / 4, where N d is the number of data subcarriers contained in each OFDM symbol, the modulation method is 16QAM modulation, and its first modulation symbol is a 1 +b 1 i, the second modulation symbol is a 2 +b 2 i, correspondingly until the Nth d / 4 modulation symbols.

[0057] put this N d / 4 modulated symbols in [1, N d / 4] The subcarrier segment is directly mapped, the first modulation symbol is mapped to the first subcarrier of the positive frequency, and the second modulation symbol is mapped to the second subcarrier of the positive frequency. According to this method, N d / 4 modulation symbols are mapped to 1 to N d / 4 subcarrier.

[0058] N d / 4 modulated symbols in [N d / 4+1,N d / 2] The subcarrier segment is directly mapped, and the first modulation symbol is mapped to the Nth positive frequency d On the / 4+1 subcarrier, the second modulation symbol is mapped to the positive frequency N...

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Abstract

The invention discloses a data sending method, a data restoring method and a device. The data sending method comprises the following steps: modulating data to be sent to obtain a modulation symbol, wherein the modulation symbol is represented by an I (in-phase) component and a Q (quadrature) component; mapping the modulation symbol onto a first appointed sub-carrier band; mapping the modulation symbol onto a second appointed sub-carrier band after interchange of the I component and the Q component; and sending the mapped modulation symbol. Through the data sending method, the data restoring method and the device, the problem that the conventional data sending method is relatively low in reliability is solved; and a better frequency diversity effect is achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data sending method, a restoration method and a device. Background technique [0002] Wireless Local Area Networks (WLAN) is the application of wireless communication technology to interconnect computer equipment to form a network system that can communicate with each other and realize resource sharing. The essential feature of WLAN is that it no longer uses communication cables to connect computers to the network, but connects them wirelessly, so that the construction of the network and the movement of terminals are more flexible. IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) 802.11 is one of the mainstream technologies of wireless local area networks at present. This protocol mainly specifies the physical layer (PHY) and media access control (MAC, Media Access Control) layer specifications. [0003] In response ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/34H04L27/38
CPCH04L5/003H04B7/12
Inventor 段灿许进江岸明姜静田开波孙波李楠吕开颖韩志强邢卫民
Owner ZTE CORP
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