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Transmission device used for orthogonal frequency-division multiplexing system

A transmitting device and orthogonal frequency division technology, applied in the field of communication, can solve problems such as accelerating retransmission delay, and achieve the effect of flexible multi-input and multi-output support

Inactive Publication Date: 2009-11-04
ZTE CORP
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Problems solved by technology

[0010] At the same time, since the characteristics of subframes are generally used to meet the system delay requirements, RTT is used as an index to consider system delay. For some fast services (for example, semi-static services that do not need to transmission, which can speed up the retransmission delay

Method used

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  • Transmission device used for orthogonal frequency-division multiplexing system
  • Transmission device used for orthogonal frequency-division multiplexing system
  • Transmission device used for orthogonal frequency-division multiplexing system

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Embodiment Construction

[0020] The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] image 3 is a structural schematic diagram of a transmitter according to an embodiment of the present invention. Such as image 3 As shown, the transmitter (that is, the transmitting device) includes:

[0022] The code layer mapping unit is used to receive the transmission block from the medium access control (MAC) layer, divide the transmission block into ordinary data packets and enhanced data packets, and divide the ordinary data packets according to the first predetermined length limit to generate ordinary data Multiple segmentation results of the packet, segmenting the enhanced data packet according to the second predetermined length limit to generate multiple segmentation results of the enhanced data packet;

[0023] A coding and modulation unit, configured to perform coding and modulation processing on each segmen...

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Abstract

The invention discloses a transmission device used for an orthogonal frequency-division multiplexing system, comprising a code layer mapping unit, a coding modulation unit, a flow mapping unit, a multi-input multi-output processing unit and a source mapping unit, wherein the code layer mapping unit divides a transmitted transmission block into a common data packet and a reinforced data packet, divides the common data packet and then divides the reinforced data packet; the coding modulation unit is used for carrying out coding modulation processing to every division result of the common data packet and every division result of the reinforced data packet; the flow mapping unit is used for regrouping every coding modulation result of the common data packet and every coding modulation result of the reinforced data packet; the multi-input multi-output processing unit is used for carrying out multi-input multi-output processing to every coding modulation result of the common data packet after being regrouped and every coding modulation result of the reinforced data packet after being regrouped; and the source mapping unit is used for inserting pilot frequency into every multi-input multi-output processing result of the common data packet and every multi-input multi-output processing result of the reinforced data packet according to a preset pilot frequency pattern and transmitting the multi-input multi-output processing results by a subcarrier source.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a transmitting device for an orthogonal frequency division multiplexing system. Background technique [0002] With the rapid development of high-speed and reliable business requirements, more and more technologies have been introduced into the field of wireless communication technology, such as multiple input multiple output (MIMO) and orthogonal frequency division multiplexing (OFDM), which are key technologies of 4G. technology. After adding MIMO to the physical layer, especially with the development of MIMO technology, various MIMO deformations have caused changes in the physical layer structure. [0003] At present, the transmitter structure in IEEE 802.16e based on OFDM technology is as follows: figure 1 shown. exist figure 1 In the shown transmitter structure, the randomization processing unit first performs randomization processing on the input data bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04J11/00
Inventor 王文焕
Owner ZTE CORP
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