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Arithmetic domain bit interleaved code modulation method

A technology of bit interleaving and coding modulation, which is applied in the field of bit interleaving coding and modulation in the arithmetic domain, can solve the problem of limited dynamic adjustment range of the rate and achieve the effect of improving system performance

Active Publication Date: 2013-10-09
TONGJI UNIV
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Problems solved by technology

However, the link adaptation implemented by the sending end has its inherent defects. One is that the receiving end needs to feed back accurate channel state information, and the other is that the dynamic adjustment range of the rate is limited, and the rate adjustment is stepped.

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  • Arithmetic domain bit interleaved code modulation method
  • Arithmetic domain bit interleaved code modulation method
  • Arithmetic domain bit interleaved code modulation method

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Embodiment

[0032] The present invention proposes an arithmetic domain bit interleaving coding and modulation method (referred to as A-BICM) capable of realizing link adaptation at the receiving end. In this method, at the sending end, the original information bits are generated according to the random mapping code generation matrix to generate the modulated signal, and then incrementally sent until the decoding success signal sent by the receiving end is received. Different from the general adaptive method, the incremental After the number of signals sent by the quantitative method reaches a certain amount, the sending end no longer sends the modulated signal of the original information bits, but performs LDPC encoding on the original information bits, and then generates the modulated signal according to the random mapping code generation matrix for the encoded information bits, increasing Quantitative transmission until the ACK signal (confirmation signal) from the receiving end is recei...

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Abstract

The invention relates to an arithmetic domain bit interleaved code modulation method. The method includes the following steps that 1) the structure of a code is analyzed through an extrinsic information transfer graph, and a superior weight set is selected to construct a mapping matrix; 2) code modulation is carried out at a transmitting end according to the mapping matrix; 3) demodulation and decoding are carried out after a receiving end receives modulated signals. Compared with the prior art, an arithmetic domain bit interleaved code modulation method is put forward on the basis of a random mapping code and is combined with system channel coding, design of self-adaption of a link of the receiving end is achieved, performance of a high signal to noise ratio and performance of a low signal to noise ratio are balanced, and performance of the system can be kept under the condition of coding complexity without increase of the high signal to noise ratio and is improved through using of a coding method under the condition of the low signal to noise ratio.

Description

technical field [0001] The present invention relates to a signal modulation method, in particular to an arithmetic domain bit interleaving coding modulation method. Background technique [0002] A fundamental problem in wireless communication is how to achieve a high transmission rate in a time-varying channel environment by designing coding and modulation strategies. Link adaptation is an important technology to improve the performance of wireless network systems, which can be divided into sender chain Road adaptation and receiver link adaptation. Link adaptation at the sending end dynamically adjusts channel coding and modulation according to channel conditions to achieve optimized wireless communication system performance. The main technologies realized are AMC, HARQ and the mixed mode of the two methods. However, the link adaptation implemented by the sending end has its inherent defects. First, the receiving end needs to feed back accurate channel state information. S...

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Application Information

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IPC IPC(8): H04L1/00H04L25/02H03M13/11
Inventor 吴俊滕姿陆欣璐刘典王敏李文锋程松林
Owner TONGJI UNIV
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