Wireless communication apparatus and wireless communication method

A communication device and communication frame technology, applied in multiplex communication, radio transmission system, transmission path separation device, etc., can solve the problem of lack of description estimation accuracy, etc., to improve error resistance and communication efficiency, high The effect of reliability

Inactive Publication Date: 2011-01-12
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, Patent Document 2 does not describe symbol processing according to the required channel estimation accuracy when using an adaptive modulation scheme

Method used

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  • Wireless communication apparatus and wireless communication method
  • Wireless communication apparatus and wireless communication method
  • Wireless communication apparatus and wireless communication method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0087] According to the first embodiment, in order to change the data symbols in a slot into pilot symbols (control symbols), when STBC is performed on the data symbols in a slot, a symbol based on Predetermined process of propagation path (channel) conditions. For example refer to Figure 4 , the combination of two adjacent symbols in the direction of the time axis surrounded by thick lines is defined as "one STBC combination", and the combination is formed to perform STBC on it. Therefore, the symbols represented by "R" in the figure are defined as "residual symbols", that is, unprocessed symbols.

[0088] Symbol processing according to the first embodiment is described by using a flowchart and a diagram of symbol arrangement in a slot. image 3 is a flowchart showing an example of symbol processing by the communication device according to the first embodiment of the present invention. Figure 4 to Figure 9 is a diagram showing an example symbol arrangement in a slot. Al...

no. 2 example

[0097] According to the second embodiment, in order to change the data symbols in a slot into pilot symbols (control symbols), when performing SFBC on the data symbols in a slot, a propagation-based Predetermined process of path (channel) conditions. For example Figure 11 As shown in , a combination of two adjacent symbols in the direction of the frequency axis surrounded by a thick line is defined as "one SFBC combination", which is formed to perform SFBC on it. Therefore, the symbols represented by "R" in the figure are defined as "residual symbols", that is, unprocessed symbols.

[0098] Symbol processing according to the second embodiment is described by using a flowchart and a diagram of a symbol arrangement in a slot. Figure 10 is an example flowchart showing symbol processing of the communication device according to the second embodiment of the present invention. Figure 11 to Figure 15is a diagram showing an example symbol arrangement in a slot. Although only a s...

no. 3 example

[0107] According to the third embodiment, in order to change the data symbols in a slot into pilot symbols (control symbols), when performing STFBC on the data symbols in a slot, perform A predetermined process based on propagation path (channel) conditions. For example Figure 18 As shown in , a combination of two adjacent symbols surrounded by a thick line in the direction of the time axis and the direction of the frequency axis is defined as "one STFBC combination", and the combination is formed to perform STFBC on it. Therefore, the symbols represented by "R" in the figure are defined as "residual symbols", that is, unprocessed symbols.

[0108] Figure 16 An example configuration and block diagram of a wireless communication system according to the third embodiment are shown. The wireless communication system is composed of the following: a third communication device (sending station, base station) 300 mainly working as a transmitter and a second communication device (...

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PUM

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Abstract

Provided are a radio communication device and a radio communication method which have a higher efficiency and reliability as compared to the conventional device and method when performing an OFDMA communication by using the encoding method. The communication device (100) includes: a processing unit (160) which performs a symbol process in a communication frame; a detection unit (120) which detects a value indicating a variation state of a propagation path; a modification processing unit (170) which controls the processing unit (160) to modify a symbol to a control symbol according to a value indicating the variation state and the modulation method; and a transmission unit (110) which transmits a communication frame after the control to other communication device.

Description

technical field [0001] The present invention relates to a wireless communication device and a wireless communication method using OFDMA (Orthogonal Frequency Division Multiple Access), and more particularly, to a wireless communication method when using a coding scheme (STBC (Space-Time Block Code) scheme or SFBC (Space-Frequency Block Code) code) scheme) and an adaptive modulation scheme to transmit data symbols to communicate with another communication device, which can improve error resistance and communication efficiency, thereby having a wireless communication device and a wireless communication method with higher reliability than conventional techniques . Background technique [0002] WiMAX (Worldwide Interoperability for Microwave Access), UMB (Ultra Mobile Broadband), and OFDMA (Orthogonal Frequency Division Multiple Access) schemes (or OFDM (Orthogonal Frequency Division Multiple The wireless communication system of scheme) uses multi-carriers to improve communicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B7/02H04B7/06H04B7/10H04J1/00H04J99/00H04L1/00H04L27/00
CPCH04L5/0044H04B7/0669H04L1/0643H04L5/0046H04L5/0007H04L27/2626H04L1/0003H04L1/0606
Inventor 上甲信悟
Owner KYOCERA CORP
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