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Retransmission method, transmitting device and communication system

A technology of a transmitting device and a communication system, which is applied to a multi-frequency code system, using a return channel for error prevention/detection, etc., can solve the problem that frequency selective channels are difficult to obtain, and achieve the effect of realizing data throughput performance.

Inactive Publication Date: 2012-07-25
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to obtain good results in frequency selective channels

Method used

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  • Retransmission method, transmitting device and communication system
  • Retransmission method, transmitting device and communication system
  • Retransmission method, transmitting device and communication system

Examples

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Embodiment Construction

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0040] figure 1 It is a block diagram of a transmission device 100 of a multiple-input multiple-output communication system using orthogonal frequency division multiplexing (that is, a MIMO-OFDM system). figure 2 is a block diagram of the receiving device 200 of this system. The two figures show a system using two transmit antennas and two receive antennas, however, the invention can be extended to systems using multiple (NT) transmit antennas and multiple (NR) receive antennas.

[0041] In the transmitting device 100, data processing is performed for each antenna chain. Mutually distinct and independent data streams are transmitted by each transmit antenna. The input data is first appended with a cyclic redundancy check (CRC) code by the CRC appending unit 102 . Then, channel coding processing such as convolutional coding and Turbo coding is performed by...

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Abstract

The invention provides a retransmission method, a transmitting device and a communication system for automatically retransmitting a request of a transmitting device communicating with a receiving device in an MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) communication system. The retransmission method comprises a receiving step of receiving feedback information of positive acknowledgement or negative acknowledge of a result of a cyclic redundancy check based on the receiving device, and a selecting step of selecting a retransmission mode. The retransmission mode of data signals is selected from a first mode of using one antenna to send data and using the other antenna to send the other data simultaneously and a second mode of using a space diversity technology to send the data according to the feedback information.

Description

[0001] This application is a divisional case of an invention patent application with an application date of September 13, 2004, an application number of 200480043975.7, and an invention title of "Automatic Retransmission Request Control System and Method for Orthogonal Frequency Division Multiplexing MIMO System" Application. technical field [0002] The present invention relates to an Automatic Repeat Request (ARQ) control system and a retransmission method used in a Multiple Input Multiple Output (MIMO) communication system using Orthogonal Frequency Division Multiplexing (OFDM). Background technique [0003] When using multiple roots (N T ) transmit antenna and multiple (N R ) simultaneous transmission of multiple data streams in a MIMO communication system with receiving antennas. Depending on the method of utilization, the MIMO system can achieve performance improvement through space diversity and system capacity improvement through space multiplexing. The above impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L27/26
Inventor 叶子荣罗丽颖
Owner PANASONIC CORP
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