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Assembly-line architecture of polarization code belief propagation decoder

A technology of belief propagation and decoder, which is applied in the field of pipeline architecture of belief propagation decoder, can solve the problems of large system delay and limited application, so as to improve processing speed, reduce implementation complexity, and reduce decoding delay Effect

Active Publication Date: 2016-06-01
SOUTHEAST UNIV
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Problems solved by technology

However, due to its own seriality, this kind of decoder will bring a large system delay, which limits its application in actual scenarios

Method used

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  • Assembly-line architecture of polarization code belief propagation decoder
  • Assembly-line architecture of polarization code belief propagation decoder
  • Assembly-line architecture of polarization code belief propagation decoder

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0036] 1. Fixed-point solution

[0037] Before the hardware implementation of BP decoding algorithm is given, it is first necessary to determine the fixed-point scheme. For (1024,512) polar codes, the simulation results of different fixed-point schemes are as follows figure 2 shown. Among them, 1S+kI+lF means that in the fixed-point scheme, there is 1 bit sign bit, kbits integer bits store lbits decimal places; in all fixed-point schemes, the number of iterations ...

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Abstract

Disclosed in the invention is assembly-line architecture of a polarization code belief propagation decoder. The assembly-line architecture comprises a BP decoder and a calculation module BCB. A BP decoding algorithm of the BP decoder is realized by iteration of n-order factor graph including (n+1) N nodes, wherein the N expresses a code length. Each node includes two kinds of likelihood probabilities: a first likelihood probability and a second likelihood probability; an input terminal of the BP decoder serves as a left end and an output terminal of the decoder serves as a right end; the first likelihood probability is used for message updating and transmission from the left side to the right side; and the second likelihood probability is used for message updating and transmission from the right side to the left side. The calculation module BCB is used for message updating and transmission between four nodes at an interval of an N / 2 bit at adjacent orders. According to the invention, the high-throughput-rate and low-complexity BP decoder architecture of the polarization code is realized; and the hardware realization complexity can be reduced and the processing speed is enhanced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and is a pipeline structure applied to a Belief Propagation (BP) decoder of a novel channel coding polar code. Background technique [0002] The modern development of wireless communication technology began in the 1990s, its development speed has been on the rise, its development scale is constantly expanding, and its application scope is becoming more and more extensive. In recent years, wireless communication technology has become a hot technology with the greatest development potential and the broadest market prospect in today's communication field. Mobile communication has now entered the application stage of the fourth-generation mobile communication (4G) industrialization, and is developing in the direction of high speed, high capacity, high spectral efficiency and low power consumption, constantly meeting people's growing data and video needs . According to predictions fro...

Claims

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Application Information

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IPC IPC(8): H03M13/15
CPCH03M13/1111H03M13/1191H03M13/13H03M13/1555
Inventor 张川杨俊梅尤肖虎
Owner SOUTHEAST UNIV
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