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Radio communication apparatus and radio communication method

A wireless communication device and wireless communication technology, applied in channel estimation, modulation carrier system, transmission system, etc., can solve the problems of poor survivability, no clear explanation of status, and low data transmission efficiency.

Inactive Publication Date: 2005-12-21
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, traditional systems suffer from inefficiency in transmitting data, especially to receiving stations that are stationary or moving at slower speeds
[0014] In addition, although patent documents 2 and 3 disclose techniques capable of changing the pilot signal insertion interval, none of them clearly explains how to detect the state of the transmission path (channel) exactly, so even referring to the patent documents 2 and 3, it is also difficult to detect the state of the transmission path with high precision, and the survivability of this invention is also extremely poor

Method used

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  • Radio communication apparatus and radio communication method
  • Radio communication apparatus and radio communication method
  • Radio communication apparatus and radio communication method

Examples

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no. 1 example

[0090] First, a first embodiment of the present invention will be described. FIG. 1 is a block diagram showing an example of the internal configuration of a wireless communication device in the first embodiment of the present invention. The wireless communication device 100 shown in FIG. 1 includes: an RF reception section 1 ; a demodulation section 2 ; a transmission path time fluctuation detection section 3 ;

[0091] This RF receiving section 1 converts a radio signal received from a transmission path through an antenna 9 into a signal capable of being processed at a physical layer, and supplies the converted signal to a demodulation section 2 and a transmission path time fluctuation detection section 3 . The demodulation section 2 performs demodulation processing on the signal supplied from the RF reception section 1, and outputs the demodulated signal as reception data to the upper layer.

[0092] At the same time, the transmission path time fluctuation detecting section...

no. 2 example

[0117] Next, a second embodiment of the present invention will be described. Fig. 2 is a block diagram showing an example of the internal configuration of a wireless communication device in a second embodiment of the present invention. The wireless communication 100 shown in Fig. 2 comprises: RF reception part 1; Demodulation part 2; Transmission path time fluctuation detection part 3; Pilot signal insertion interval determination part 4; the transmission part 5; and the RF transmission part 6. The second embodiment explains the detailed structure of the transmission section 5 of the first embodiment, and the RF reception section 1, the demodulation section 2, the transmission path time fluctuation detection section 3, the pilot signal insertion interval determination section 4, and the RF transmission section 6 is the same as those in the first embodiment.

[0118] In addition, FIGS. 3A-3C are schematic diagrams of data structures processed in the wireless communication dev...

no. 3 example

[0123] Next, a third embodiment of the present invention will be described. Fig. 4 is a block diagram showing an example of the internal configuration of a wireless communication device in a third embodiment of the present invention. The wireless communication 100 shown in Fig. 4 comprises: RF receiving part 1; Demodulation part 2; Transmission path time fluctuation detection part 3; Pilot signal insertion interval determination part 4; the transmission section 5 of the data combining section 13; and the RF transmission section 6. The third embodiment explains the detailed structure of the transmission section 5 of the first embodiment, and the RF reception section 1, the demodulation section 2, the transmission path time fluctuation detection section 3, the pilot signal insertion interval determination section 4, and the RF transmission section 6 is the same as those in the first embodiment.

[0124] In addition, FIGS. 5A-5D show schematic diagrams of data structures proces...

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Abstract

The communication throughput between the transmitting station and the receiving station can be increased according to the rate of fading change between the transmitting station and the receiving station. Antenna (9) and RF receiving section (1) receive a signal transmitted from another wireless communication device. A transmission path time change determination section (3) uses the received signal to determine a time change amount of the transmission path response. A pilot signal insertion interval determination section (4) determines an insertion interval of a known reference signal (pilot signal) using the determined temporal change amount of the transmission path response. The transmission section (5) inserts the pilot signal into the information signal to be transmitted according to the insertion interval, and then transmits the information signal into which the pilot signal has been inserted to other wireless communication devices. In this way, the information signal can be transmitted according to the optimal pilot signal insertion interval in the transmission path determined according to the determination result of the time variation amount of the transmission path response. Therefore, the communication throughput can be improved without providing any redundant pilot signals.

Description

technical field [0001] The present invention relates to a wireless communication device and a wireless communication method employing a communication method in which pilot symbols are inserted into transmission data and amplitude and phase fluctuations are compensated for. Background technique [0002] In recent years, multi-level quadrature amplitude modulation systems (such as 16-QAM (Quadrature Amplitude Modulation) and 64-QAM) that require coherent (synchronous) detection have been used to enhance wireless LAN (Local Area Network local area network network) in digital mobile wireless communication systems, land communication systems, etc. In digital mobile wireless communication with transmitting and receiving stations and peripherals, its properties are significantly degraded due to phasing of amplitude and phase fluctuations of the received signal. Therefore, in order to apply QAM to mobile wireless communications, a system for effectively compensating for amplitude / p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L25/02H04L27/26H04L27/36
CPCH04L25/0202H04L25/021H04L25/0226H04B1/76
Inventor 今村大地平野纯
Owner PANASONIC CORP