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Wireless sending device, wireless receiving device and data transmission method

A wireless receiving device, wireless transmission technology, applied in radio transmission system, digital transmission system, preventing/detecting errors through diversity reception, etc., can solve problems such as wireless communication quality degradation, and achieve the effect of suppressing the amount of calculation

Active Publication Date: 2017-03-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In wireless communication systems, fading mainly associated with mobile degrades the quality of wireless communication

Method used

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  • Wireless sending device, wireless receiving device and data transmission method
  • Wireless sending device, wireless receiving device and data transmission method
  • Wireless sending device, wireless receiving device and data transmission method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] figure 1 It is a diagram showing a configuration example of a modulation unit included in the wireless transmission device of the wireless communication system according to the first embodiment. figure 2 It is a diagram showing a configuration example of a demodulation unit included in the wireless reception device of the wireless communication system according to the first embodiment. In addition, in figure 1 as well as figure 2 In , descriptions of filters, amplifiers, frequency converters, analog / digital converters, digital / analog converters, etc. necessary for wireless transmission / reception devices are omitted. In addition, the radio transmission device constitutes a communication device on the transmission side, and the radio reception device constitutes a communication device on the reception side. The wireless transmitting device includes two transmitting antennas (referred to as transmitting antennas #1 and #2), and the wireless receiving device includes o...

Embodiment approach 2

[0074] Figure 4 It is a diagram showing a configuration example of a demodulation unit according to Embodiment 2. In this embodiment, a modified example of the demodulation unit described in Embodiment 1 will be described. In addition, in Figure 4 In the demodulation section of Embodiment 1 (refer to figure 2 ) are assigned the same symbol. In this embodiment, only the parts different from Embodiment 1 will be described. The modulation unit provided on the signal transmission side is the same as that in the first embodiment.

[0075] In the demodulation unit of the present embodiment, the one-square root calculation units 7 - 1 and 7 - 2 included in the demodulation unit of the first embodiment are replaced with the multiplication unit 16 and the one-square root calculation unit 17 .

[0076] The multiplication unit 16 multiplies the received signal power calculated by the received signal power calculation unit 11 and the transmission channel gain calculated by the tra...

Embodiment approach 3

[0080] Figure 5 It is a diagram showing a configuration example of a demodulation unit according to Embodiment 3. Similar to Embodiment 2, a modified example of the demodulation unit described in Embodiment 1 will be described. In addition, in Figure 5 In the demodulation section of Embodiment 1 (refer to figure 2 ) are assigned the same symbol. In this embodiment, only the parts different from Embodiment 1 will be described. The modulation unit provided on the signal transmission side is the same as that in the first embodiment.

[0081] In the demodulation unit of the present embodiment, interpolation delay units 18 - 1 and 18 - 2 and an interpolation unit 19 are added to the demodulation unit of the first embodiment.

[0082] The interpolation delay units 18-1 and 18-2 delay the input signal for a certain time and then output it. The interpolation unit 19 performs interpolation processing on the output (one-square-root of the propagation path gain) from the one-squ...

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PUM

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Abstract

The radio transmission device of the present invention is provided with: a plurality of transmission antennas; The initial symbol generating part (2), as the reference signal when differential encoding starts, generates the initial symbol; The differential encoding unit (differential encoding section 3, transmission signal power Calculation section 6, one-square-root calculation section 7), carry out differential encoding to the transmitted symbol mapped with information bit to generate the symbol after differentiation; Perform space-time encoding to generate signals transmitted from each transmitting antenna, and the differential encoding unit determines the differential encoding generated in this differential encoding process based on the power of the initial symbol or the power of the differentially differentiated symbol generated last time. The power of the following symbol.

Description

technical field [0001] The present invention relates to a wireless transmission device, a wireless reception device, and a data transmission method for transmitting and receiving signals using a plurality of antennas. Background technique [0002] In a wireless communication system, fading mainly accompanied by movement degrades the quality of wireless communication. As a method for alleviating quality degradation due to fading, there is known a space-time coded transmission diversity method in which a plurality of antennas are arranged in a terminal or a base station so that the correlation of channel fluctuations of the antennas is reduced. , using the different transmission paths between the antennas to suppress the power reduction caused by fading. In addition, Patent Document 1 discloses differential space-time coding transmission diversity, which uses transmission information corresponding to transmission bits between consecutive symbols as a change amount in phase sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34H04B7/06H04L1/06
CPCH04L27/3416H04B7/0669H04L1/0625H04L1/0631H04L1/0668H04L1/0618H04B7/0697
Inventor 加藤泰典冈崎彰浩
Owner MITSUBISHI ELECTRIC CORP
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