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Mixed code modulation and power distribution method in communication system

A communication system and hybrid coding technology, applied in transmission systems, digital transmission systems, error prevention, etc., can solve problems such as application limitations and unsatisfactory performance, and achieve low complexity, reduced interleaving depth, and reduced complexity. Effect

Inactive Publication Date: 2005-11-09
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

However, the performance of the above four methods when combined with high-order modulation is not satisfactory, which limits their practical application

Method used

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  • Mixed code modulation and power distribution method in communication system
  • Mixed code modulation and power distribution method in communication system
  • Mixed code modulation and power distribution method in communication system

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Embodiment Construction

[0016] In the present invention, the bit sequences after channel coding and rate matching (punching, repetition or zero insertion) at the sending end are separated and reorganized into multiple branches according to the importance of different bits, and the bit sequences of each branch are respectively To perform bit interleaving, multiple existing interleaving methods can also be used here.

[0017] Separately process the bit sequences of multiple branches after separation and recombination, including:

[0018] (1) Different modulation methods are used for bit sequences of different branches, for example, a low-order modulation method is used for high-importance bits, and a high-order modulation method is used for low-importance bits.

[0019] (2) Different powers are allocated to different branch signals, for example, higher transmission power is allocated to bit sequences with higher importance, and lower transmission power is allocated to bit sequences with lower importanc...

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Abstract

This invention discloses a method for hybrid encode modulation and power distribution including: 1,at the transmission end, the channel encoded data are separated and reorganized to bit sequences with multiple branches based on the different bit importance, 2, the bit sequences of multiple branches are interleaved separately, 3, the inter leaved bit sequences are modulated separately, 4, distributing power to symbols of the modulated branches, 5, imaging the modulated signals to the physical channel, 6, at the receive end, applying corresponding ways to demodulate the received symbols of different branches to be de-interleaved and de-separated so as to get the data sent by the transmission end.

Description

technical field [0001] The invention relates to a hybrid coding modulation and power distribution method with higher power efficiency and spectrum efficiency. Background technique [0002] It can be predicted that multimedia services such as audio, video, image, and Internet will become the dominant services of mobile communications in the future, and these services have significantly increased requirements for wireless link transmission capabilities (the peak service rate of these services is greater than 20Mbps), in this case, In order to transmit high-speed data and improve the spectral efficiency of the system, multi-ary modulation has been widely used. However, the improvement of the spectral efficiency of the multi-ary modulation system is exchanged by sacrificing the power efficiency. When the signal is damaged by noise and interference, the error probability of the received signal will also increase accordingly. Although Amplitude-Phase Joint Keying (APK) can be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 李立华张平李霜杨晓辉谢文飞陶小峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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