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Joint detection and decoding algorithm based on turbo-scma system

A joint detection and decoding technology, applied in the field of joint detection and decoding algorithms, can solve problems such as high algorithm complexity, small gain, and inability to adapt to the higher requirements of 5G, so as to increase the number of iterations, improve decoding performance, and reduce Detecting the effect of decoding complexity

Active Publication Date: 2019-01-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the iterative decoding algorithm adopted by the traditional Turbo-SCMA-based system has high algorithm complexity and small gain, and cannot adapt to the higher requirements of 5G in the future

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  • Joint detection and decoding algorithm based on turbo-scma system
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  • Joint detection and decoding algorithm based on turbo-scma system

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Embodiment Construction

[0017] The present invention will be further described in detail below in combination with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0018] Such as figure 1 The schematic structural diagram of the device based on the shown method of the present invention; the device based on the method of the present invention includes an initialization module 101, an SCMA detection module 102, an information exchange module 103 and a Turbo decoding module 104, and the SCMA detection module 102 detects The channel received value y has N*L dimensions, where N represents the number of SCMA resource blocks, and L is the number of SCMA symbols on each layer.

[0019] On the basis of the device formed by initialization module 101, SCMA detection module...

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Abstract

The invention discloses a joint detection and decoding algorithm based on a Turbo-SCMA system. The device, on which the method is based, comprises an initialization module, an SCMA detection module, an information exchange module and a Turbo decoding module. The joint detection and decoding algorithm based on the Turbo-SCMA system enables extrinsic information exchange between a detector and a decoder to be more frequent and convergence to be faster through a joint iterative decoding mode. The joint detection and decoding algorithm greatly reduces system detection and decoding complexity under the condition of not losing decoding performance; and compared with a conventional iterative decoding algorithm, the joint detection and decoding algorithm increases the number of iterations and can greatly improve the decoding performance.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a joint detection and decoding algorithm based on a Turbo-SCMA system. Background technique [0002] SCMA (Sparse Code Multiple Access) technology is a non-orthogonal multiple access technology designed for 5G requirements such as large capacity, massive connections, and ultra-low latency. Compared with OFDMA, the key technology of 4G, it has higher spectral efficiency and can significantly increase system capacity. [0003] At present, Turbo codes are usually used as channel codes to improve SCMA detection performance. For the iterative decoding algorithm used in traditional Turbo-SCMA-based systems, multiple iterations must be performed in both the SCMA detection module and the Turbo decoding module. However, due to Excessive confidence will cause a certain degree of error in the detector or decoder, and although the iterative decoding algorithm used in the traditional Tu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/37
CPCH03M13/37
Inventor 张珍兵胡剑浩陈杰男吴廷勇马上
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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