An optimized power allocation method for mimo and ofdm communication systems

A technology for optimizing power and distribution methods, applied in the field of communication, can solve the problem of unconsidered model power distribution, affecting channel error correction coding performance and other problems, and achieve the effect of compensating for performance deterioration, enhancing error correction performance, and improving efficiency and reliability.
CN114050894BActive Publication Date: 2022-08-05UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2022-08-05

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Abstract

The invention belongs to the field of communication technologies, and in particular relates to an optimized adaptive power distribution method based on irregular LDPC code transmission in MIMO and OFDM communication systems. In this method, under the condition that the average power of each transmit antenna of the MIMO system remains unchanged, the channel conditions estimated by the channel state information are used, and the corresponding precoding scheme is used to calculate the optimal power allocation value through theoretical calculation. The allocation value adjusts the transmit power of the LDPC-coded and modulated symbols, so as to optimize the error correction performance of the LDPC code under this transmission model, thereby improving transmission efficiency and increasing transmission reliability.
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Description

technical field

[0001] The invention belongs to the technical field of communication, and relates to an optimized adaptive power distribution method based on irregular LDPC code transmission in MIMO and OFDM communication systems. Background technique

[0002] Low-density parity-check codes (LDPC) is a linear block code, proposed by R.Gallager in 1962 (R.Gallager.Low-density parity-check codes[J].IRETransactions on Information Theory, 1962, 8(1):21-28). In 2001, Mackay et al. re-studied confirmed that LDPC codes have performance approaching the Shannon limit (D.J.C.MacKay and R.M.Neal.Near Shannon limit performance of low density parity check codes[J].IEE Electron.Lett.,1997,33(6): 457-458.). Subsequently, it attracted the attention of a large number of researchers. Among them, T.J.Richardson proposed that the theoretical performance analysis and optimal construction of LDPC codes can be carried out by using density evolution theory (T.J.Richardson, R.L.Urbank. Efficient e...

Claims

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