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Optimization method and system for fixed-point soft information

An optimization method and soft information technology, applied in transmission systems, multi-carrier systems, digital transmission systems, etc., can solve the problems of cumbersome implementation, complicated operations, and less effective data information, and achieve convenient implementation and improved decoding performance. , the effect of reducing the amount of calculation

Active Publication Date: 2017-09-26
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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Problems solved by technology

[0007] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a fixed-point soft information optimization method and system for adaptively adjusting the soft information according to the bit width of the decoder, improving decoding performance, and solving the problems of the prior art. The problems of low degree of dynamic adjustment, less effective data information, error-prone decoder decoding, complex calculation and cumbersome implementation methods

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  • Optimization method and system for fixed-point soft information
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Embodiment Construction

[0047] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0048] see Figure 1 to Figure 5 . It should be noted that the structures shown in the drawings attached to this specification are only used to match the content disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the restrictive conditions for the implementation of the present invention, so there is no Technically, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical content disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered. At the same time, terms ...

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Abstract

The invention provides an optimization method for fixed-point soft information, and the method comprises the following steps: obtaining a noise variance estimated value; judging whether the noise variance estimated value is greater than a threshold value or not; carrying out the data statistics of all soft information in a received message if the noise variance estimated value is greater than the threshold value, and obtaining a statistical value; judging whether the statistical value is greater than a critical value of system performances or not; outputting the soft information to a decoder for decoding if the statistical value is not greater than the critical value of system performances; and optimizing various types of soft information after all demapping if the statistical value is greater than the critical value of system performances.

Description

technical field [0001] The invention relates to an information optimization method after demapping in a receiver, in particular to an optimization method for fixed-point soft information. Background technique [0002] In the actual operation process of the communication system using the existing technology, there is an operation process in the signal receiving process of the receiver. Due to the limitation of the objective technical level, the accuracy of the received data obtained by the operation process is limited. In order to simulate the real hardware environment , needs to be completed by performing fixed-point operations on the binary data received by the receiver. The fixed-point operation of floating-point operations has made a certain compromise on floating-point performance. The fixed-point method and fixed-point system of this compromise design can use a smaller area in the process of realizing the floating-point data reception function of hardware devices such a...

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Application Information

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IPC IPC(8): H04L27/34H04L27/38
CPCH04L27/3411H04L27/38
Inventor 陈健李明齐唐杰王芳
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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