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Method for sending and receiving a multicarrier signal, corresponding transmitter, receiver, signal, and computer program

A multi-carrier signal and receiver technology, applied in the field of transmission and reception of multi-carrier signals, can solve problems such as high cost and high complexity at the receiver level, and achieve the effect of extending the duration

Active Publication Date: 2013-03-20
FRANCE TELECOM SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in greater complexity and cost at the receiver level
Under the assumption that the receiver is more and more often a mobile station, this deficiency can become very substantial

Method used

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  • Method for sending and receiving a multicarrier signal, corresponding transmitter, receiver, signal, and computer program
  • Method for sending and receiving a multicarrier signal, corresponding transmitter, receiver, signal, and computer program
  • Method for sending and receiving a multicarrier signal, corresponding transmitter, receiver, signal, and computer program

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Embodiment Construction

[0093] 5.1 General principles

[0094] The invention resides in the context of the delivery of a message that needs to be related to the delivery channel at the time of delivery in an environment where there are small changes in the channel. Traditionally, this channel information at the time of transmission is obtained by an estimate of the channel obtained during a feedback phase preceding the transmission of the data, which is performed periodically in order to be able to take channel variations into account.

[0095] The general principle of the invention is to act during data transmission to update the estimate of the downlink channel between transmitter and receiver, thereby making it possible to optimize the duration of the transmission phase between two feedback phases.

[0096] To do so, the invention uses the acknowledgment information transmitted by the receiver for acknowledging the receipt of the payload data transmitted by the transmitter, in order to update the ...

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Abstract

The invention relates to a method for a transmitter using at least two transmit antennas to send a multicarrier signal to at least one receiver using at least one receive antenna, comprising a step of obtaining an estimation of at least one downlink transmission channel. According to the invention, such a method comprises a transmission phase implementing at least one iteration of the following steps for at least one downlink channel: sending of useful data over said downlink channel, taking account of said estimation of the downlink channel; updating of said estimation of the downlink channel by taking account of information acknowledging receipt of said useful data, said information being sent by the receiver associated with said downlink channel.

Description

technical field [0001] The field of the invention is that of digital communication and, more precisely, that of communication requiring knowledge about the channel used for transmission in an environment where there are small variations in the channel. [0002] More specifically, the invention relates to the transmission and reception of multi-carrier signals, where the transmitter can obtain an estimate of the transmission channel from information returned in the return signal from the receiver (also known as feedback). [0003] The invention finds particular application in single-user Multiple-Input Multiple-Output (MIMO) type transmission systems, for example using beamforming, or multi-user systems, for example using Space Division Multiple Access (SDMA ) type of technology. [0004] In particular, the invention finds application in transmission systems conforming to standard IEEE 802.11n (and in particular future versions thereof). Background technique [0005] as use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06H04L27/26
CPCH04B7/0626H04L25/0206H04L27/2601H04L25/0204
Inventor L.卡里欧M.迪阿洛
Owner FRANCE TELECOM SA