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Radio communication device, receiver device, and reception manner selecting method

A technology of wireless communication equipment and solutions, applied in wireless communication, shaping network in transmitter/receiver, communication between multiple stations, etc., can solve the problems of reduced throughput, high error rate of received data, etc.

Inactive Publication Date: 2005-07-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, there is a problem of a high error rate of received data and a decrease in throughput

Method used

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  • Radio communication device, receiver device, and reception manner selecting method
  • Radio communication device, receiver device, and reception manner selecting method
  • Radio communication device, receiver device, and reception manner selecting method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] FIG. 1 is a block diagram showing the configuration of a mobile station apparatus according to Embodiment 1 of the present invention. The mobile station apparatus shown in FIG. 1 has a wireless transmitter and receiver 102, a known signal obtainer 104, an SIR measurer 106, a Doppler frequency detector 108, an interference power measurer 110, a reception scheme selector 112, RAKE receiver 114 , linear equalizer 116 , demodulator 118 , decoder 120 and CQI determiner 122 .

[0035] The wireless transmitter and receiver 102 transmits and receives signals through an antenna, and performs predetermined wireless processing (including down conversion, A / D conversion, D / A conversion, and up conversion). The known signal obtainer 104 obtains known signals from the signals received by the wireless transmitter and receiver 102 .

[0036] The SIR measurer 106 measures the SIR of a known signal. SIR represents the ratio of signal power to interference power. From the SIR, a CQI to...

Embodiment 2

[0050] Embodiment 2 of the present invention is characterized in that the mobile station apparatus selects a reception scheme according to the propagation environment and at the same time transmits to the base station apparatus a CQI class that will cause a high transmission rate MCS to be selected.

[0051] Fig. 3 is a block diagram illustrating the configuration of a mobile station device according to this embodiment. The same parts in the mobile station apparatus shown in this figure as in the mobile station apparatus shown in FIG. 1 will be assigned the same reference numerals and no further explanation will be given.

[0052] The mobile station apparatus shown in FIG. 3 has a wireless transmitter and receiver 102, a known signal obtainer 104, an SIR measurer 106, a Doppler frequency detector 108, an interference power measurer 110, a reception scheme selector 112, RAKE receiver 114, linear equalizer 116, demodulator 118, decoder 120, and CQI determiner 122a.

[0053] The...

Embodiment 3

[0061] Embodiment 3 of the present invention is characterized in that, depending on the propagation environment, the base station device will select a reception scheme and report the selected reception scheme to the mobile station device.

[0062] Fig. 6 is a block diagram showing the configuration of a base station device according to this embodiment. The base station equipment as shown in accompanying drawing 6 has wireless transmitter and receiver 202, Doppler frequency detector 204, CQI extractor 206, receiving scheme selector 208, report signal generator 210, MCS selector 212, adaptive Encoder 214 , adaptive modulator 216 , and multiplexer 218 .

[0063] The wireless transmitter and receiver 202 transmits and receives signals through an antenna, and performs predetermined wireless processing (including down conversion, A / D conversion, D / A conversion, and up conversion). The Doppler frequency detector 204 detects the Doppler frequency from the received signal and measures...

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PUM

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Abstract

A wireless communication device and a method for selecting a receiving mode are used to improve the throughput of the entire system. A SIR measurement component (106) measures the SIR of a known signal. A Doppler frequency detection component (108) detects the Doppler frequency from the received signal to measure a Doppler shift, wherein the Doppler shift is an indication of the speed at which the mobile station device is moving. Interference power measuring means (110) measures interference power from different cells. Known signal acquisition section (104), SIR measurement section (106), Doppler frequency detection section (108), and interference power measurement section (110) constitute propagation environment estimation section in this embodiment. Based on the SIR, Doppler offset, and interference power, the reception method selection section (112) selects one of two reception methods, RAKE reception or linear equalization.

Description

technical field [0001] The invention relates to a wireless communication device, a receiving device and a method for selecting a receiving scheme. Background technique [0002] So far, in wireless communication systems, it has been considered to use such an adaptive (adaptive) modulation scheme, which selects a scheme for improved overall system throughput according to the propagation environment, such as MCS (modulation and coding scheme, which involves The transmission rate of the scheme and the transmission rate). [0003] When applying these MCS-selected adaptive modulation schemes to transmit data from the base station device, first, the mobile station device receives a known signal transmitted from the base station device. Using this received known signal, the mobile station apparatus measures reception quality such as SIR (Signal to Interference Ratio), and based on the reception quality, reports CQI (Channel Quality Indicator) indicating the state of the propagation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/711H04B7/26H04L25/03H04L27/00H04W28/18H04W88/02
CPCH04B1/7097H04B1/7105H04B1/7115H04L27/0008H04L2025/03547
Inventor 篠井健一郎须藤浩章
Owner PANASONIC CORP
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