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Method for determining logarithm likelihood ratio, Turbo encoding method and device thereof

A log-likelihood ratio and aggregation technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve the problems of incorrect decoding and low accuracy of log-likelihood ratio, so as to simplify operation and avoid The operation of exponential logarithm operation and the effect of improving accuracy

Active Publication Date: 2012-09-12
HONOR DEVICE CO LTD
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Problems solved by technology

[0010] Embodiments of the present invention provide a method for determining the log likelihood ratio, a Turbo decoding method and a device thereof, so as to solve the problem of low accuracy of calculating the log likelihood ratio of the transmitted signal and inaccurate decoding in the prior art. right technical question

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  • Method for determining logarithm likelihood ratio, Turbo encoding method and device thereof
  • Method for determining logarithm likelihood ratio, Turbo encoding method and device thereof
  • Method for determining logarithm likelihood ratio, Turbo encoding method and device thereof

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] see figure 1 , is a flow chart of a method for determining the log likelihood ratio provided by an embodiment of the present invention, the method is applied to a multiple-input multiple-output system, and the method includes:

[0037] Step 101: Perform adaptive node selection on the received signal, determine the survival path of the transmitted signal and the metric value corresponding to the survival path; wherein, the survival path in the embodiment of the...

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Abstract

An embodiment of the invention discloses a method for determining a logarithm likelihood ratio, a Turbo encoding method and a device thereof and is applicable to multiple-input and multiple-output systems. The method for determining the logarithm likelihood ratio includes adaptively selecting nodes for received signals, and determining survival paths of transmitted signals and measurement values corresponding to the survival paths; dividing the measurement values into a first set and a second set; respectively iteratively computing the measurement values in the first set and the measurement values in the second set to obtain first approximation probability of the first set and second approximation probability of the second set; and computing the difference of the first approximation probability and the second approximation probability to obtain the logarithm likelihood ratio of the transmitted signals. The method for determining the logarithm likelihood ratio, the Turbo encoding method and the device thereof solve technical problems of low computation accuracy of logarithm likelihood ratio of transmitted signals and incorrectness of encoding in the prior art.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for determining a logarithmic likelihood ratio, a Turbo decoding method and a device thereof. Background technique [0002] With the existing coding technology, because the Turbo code can skillfully combine the convolutional code encoder and the random interleaver, the random coding is realized, and at the same time, the soft output iterative decoding is used to approximate the maximum likelihood decoding, thus becoming The main channel coding of the third-generation mobile communication system is used for high-speed, high-quality communication services. Among them, when Turbo uses iterative decoding, the posterior probability of bits is required. In order to improve the performance of digital communication systems, soft decision mode is usually used as the posterior probability of demodulation output of digital modulation, which is provided to the channel d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06
Inventor 李景玉高振兴
Owner HONOR DEVICE CO LTD
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