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SCMA system-based DMPA decoding method and decoder architecture

A decoding and dimension technology, applied in the field of DMPA decoding method and decoder architecture, can solve problems such as implementation complexity, reduce decoding complexity, improve hardware usage efficiency, and simplify the complexity of the decoder architecture. Effect

Active Publication Date: 2017-01-04
SOUTHEAST UNIV
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Problems solved by technology

In the relevant literature on SCMA, a decoding strategy based on the maximum a posteriori probability is proposed for decoding. The SCMA system using this decoding strategy can maintain a better bit error rate level while ensuring a high level of access. , but has a very high complexity in its implementation

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  • SCMA system-based DMPA decoding method and decoder architecture
  • SCMA system-based DMPA decoding method and decoder architecture
  • SCMA system-based DMPA decoding method and decoder architecture

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Embodiment Construction

[0035] Such as figure 1 and 2 Shown, a kind of DMPA decoding method based on SCMA system comprises the following steps:

[0036] (1) Initialization; suppose (K, N) SCMA system, SCMA code dimension is K, constellation dimension is N, then the maximum number of user layers of the system is Among them, the (K,N)SCMA system is (4,2), and the maximum number of users is 6;

[0037]

[0038] here y k Represents the kth bit of the received signal, x k,1 ,x k,2 ,x k,3 respectively represent the 3 bits of the 3 user layers connected to the kth resource node overlapping each other on this node, N 0,k Represents the power density of Gaussian noise in the environment corresponding to the kth resource node;

[0039] (2) Resource node update;

[0040]

[0041]

[0042]

[0043] Among them, R k Represents the kth resource node, m 1 ,m 2 ,m 3 =1,...,M represents the different transmission symbols of the three user layers connected to this resource node; Represents the ...

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Abstract

The present invention discloses an SCMA system-based DMPA decoding method and decoder architecture. The method comprises four steps: initializing, resource node updating, layer node updating, and probability calculating and symbol determining. The architecture comprises an initializing unit for initializing, a resource node updating unit for resource node updating, a layer node updating unit for layer node updating, and a probability calculating unit for probability calculating and symbol determining. The SCMA system-based DMPA decoding method and decoder architecture have the beneficial effects that a DMPA algorithm is provided by using a nature of low complexity of an MPA decoding principle in a sparse system, so that the decoding complexity of the SCMA system is greatly lowered; and for a hardware architecture of the DMPA algorithm, series optimization in time sequence and resource reuse is made, so that a very simple low-complexity decoder architecture is obtained, and in a permitted processing speed range, hardware consumption is greatly reduced and hardware use efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a SCMA system-based DMPA decoding method and decoder architecture. Background technique [0002] In recent years, with the wide application of wireless communication technology in various fields, the demand for social communication has shown a rapid surge, and traditional communication technology is increasingly unable to meet the needs of social development. According to the predictions of major operators and authoritative consulting agencies, mobile broadband service traffic will increase by as much as 1,000 times in the next 10 years. In order to cope with the upcoming huge communication pressure, 5G has emerged as a brand new mobile communication technology. Among them, "Gbps user experience rate" will be the most critical technical indicator of 5G. In order to achieve this ultra-high-speed transmission rate, 5G will use important technologies such as large-s...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0036H04L1/0052
Inventor 张川杨超尤肖虎
Owner SOUTHEAST UNIV
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