Transmitting and receiving methods and systems of HARQ (hybrid automatic repeat request) technology adopting fountain codes

Abstract

The invention discloses transmitting and receiving methods and systems of an HARQ (hybrid automatic repeat request) technology adopting fountain codes... A transmitting module comprises a transmitted data fountain encoder, a first CRC (cyclical redundancy check) encoder, a first modulator, a feedback retransmitted data fountain encoder and a second CRC encoder, wherein the transmitted data fountain encoder is used for receiving to-be-transmitted data streams, and carrying out fountain encoding on the to-be-transmitted data streams; the first CRC encoder is connected with the output of the transmitted data fountain encoder, and used for carrying out CRC encoding; the first modulator is connected with the output of the first CRC encoder, and used for carrying out signal modulation, and transmitting output signals to a channel; the feedback retransmitted data fountain encoder is controlled by a retransmission request unit, and used for receiving the to-be-transmitted data streams, and carrying out fountain encoding on the to-be-transmitted data streams; and the second CRC encoder is connected with the output of the second CRC encoder, and used for carrying out signal modulation, and transmitting output signals to the channel. The invention also discloses corresponding receiving modules, systems and methods. The methods and systems disclosed by the invention aim to improve the transmission efficiency and the transmission reliability.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for sending and receiving HARQ technology using fountain codes. Background technique [0002] With the increasing demand for high-speed wireless services and multimedia services and the increasingly tight wireless spectrum resources, it is becoming more and more important to explore high-efficiency mobile communication systems, and HARQ (hybrid automatic retransmission) technology can well compensate for time-varying wireless mobile channels 3G and its enhanced technologies (HSDPA, HSUPA) mostly use the physical layer technology HARQ technology. For the future research of super 3G and 4G, HARQ technology is also one of the important candidate technologies. [0003] In the existing HARQ technology, forward error correction codes mainly used include block codes, convolutional codes, Turbo codes, and LDPC codes. The fountain code, as a newly propo...

AI Technical Summary

Problems solved by technology

[0005] Among these three basic types, the first simple single-decoding decoding effect is not ideal, often need to send multiple retransmissions, the second and third decoding effects are relatively ideal, but the decoding method is complicated

So these three basic HARQ types have some problems: such as bandwidth utilization, transmission delay, transmission effect, etc.

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