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Pre-coding subset segmentation 16 QAM mapping scheme in BICM-ID system

A mapping scheme and precoding technology, applied in the field of signal processing, can solve problems such as increasing system complexity, high complexity, and difficulty in handling, and achieve the effects of improving iteration gain, best asymptotic performance, and good effectiveness

Inactive Publication Date: 2017-11-17
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

However, most of the mapping schemes need to be calculated using a cost function with a large amount of calculation, which increases the complexity of the system, and the search of high-order signal constellations suitable for BICM-ID systems by computer becomes difficult due to its high complexity

Method used

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  • Pre-coding subset segmentation 16 QAM mapping scheme in BICM-ID system
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  • Pre-coding subset segmentation 16 QAM mapping scheme in BICM-ID system

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Embodiment Construction

[0021] The specific implementation manners and preferred simulation examples of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] 1. Combine with attached figure 1 Illustrate, the first step of the present invention is the precoding process, define the novel precoding algorithm as Λ: under the M order QAM mapping scheme, any m (m=log 2 M) bit information According to the formula (1), it is transformed into

[0023]

[0024] Here w(x) is an indicator, if the Hamming weight of x is odd, then w(x) takes the value 1, and if the Hamming weight of x is even, then w(x) takes the value 0. And the specified parameters can be selected in the set {1,2,...,m}, the above Fingerprint 2 addition operation.

[0025] Assuming that the selected specified parameter i=1, because c 1 The Hamming weight of is an odd number, so formula (1) can be used to get:

[0026]

[0027]

[0028]

[0029]

[0030] so c 1 ...

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Abstract

The invention relates to a novel pre-coding subset segmentation PSS-16 QAM mapping design scheme in a BICM-ID (Bit Interleaved Coded Modulation-Iterative Decoding) system. In order to increase the channel capacity of the BICM-ID system and improve the coding gain of the system, a novel PSS-16 QAM mapping scheme is provided based on an improved subset segmentation method and in combination with an innovative pre-coding algorithm. The novel pre-coding subset segmentation PSS-16 QAM mapping design scheme in the BICM-ID system is not only an efficient constellation mapping design scheme, but also the simulated analysis shows that the novel pre-coding subset segmentation PSS-16 QAM mapping design scheme has the channel capacity and the coding gain better than a Precoding-16 QAM mapping scheme and a polarization multiplexing DP-16QAM mapping scheme, and has better effectiveness and higher reliability. The novel pre-coding subset segmentation PSS-16 QAM mapping design scheme matches the decoding performance of an LDPC (Low-Density Parity-Check Code) (1 / 2, 16200) united with the BICM-ID system in a better manner, and theoretically has better bit error rate performance.

Description

technical field [0001] The invention belongs to the field of signal processing, and relates to a bit interleaved coded modulation iterative decoding (BICM-ID) system in wireless communication, in particular to a design of a precoding subset segmentation PSS-16QAM mapping scheme. Background technique [0002] The development goal of the wireless communication system is to realize information exchange between anyone, any time, and any place. To achieve this goal, ensuring the reliability of wireless network transmission and improving the utilization of wireless resources have become the focus of research in the field of wireless communication. Bit-interleaved Coded Modulation Iterative Demodulation / Decoding (BICM-ID) scheme has laid a solid foundation for further development, research and application. The early research on the constellation mapping scheme of the BICM-ID system mainly focused on selecting the most appropriate one from several typical mapping criteria as the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/34H04L1/00
CPCH04L1/004H04L1/0058H04L1/0063H04L27/3483
Inventor 袁建国汪哲郑德猛孙雪敏蹇红刘力塽王晓蓉
Owner CHONGQING UNIV OF POSTS & TELECOMM
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