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Approaching method of signal-to-noise ratio flexible message used for communication system

A signal-to-noise ratio, message technology, applied in transmission systems, wireless communications, digital transmission systems, etc.

Inactive Publication Date: 2012-12-26
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the complexity of system calculation is quite high, and the amount of calculation data is also large, which cannot effectively improve the operating efficiency of the system

Method used

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  • Approaching method of signal-to-noise ratio flexible message used for communication system
  • Approaching method of signal-to-noise ratio flexible message used for communication system
  • Approaching method of signal-to-noise ratio flexible message used for communication system

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Embodiment Construction

[0028] Please refer to figure 2 , figure 2 It is a schematic diagram of a process 20 in Embodiment 1 of the present invention. The process 20 is used at the transmission end of the communication system to improve the transmission rate adjustment method disclosed by the applicant in Taiwan Patent Application No. 97146118, so as to reduce the system load when obtaining the conditional probability density function of the signal-to-noise ratio. Process 20 includes the following steps:

[0029] Step 200: start.

[0030] Step 202: When no acknowledgment message or unreceived message has been received, use Gaussian distribution (Gaussian Distribution) to approach an initial conditional probability density function of a signal-to-noise ratio to obtain an initial conditional probability approaching the signal-to-noise ratio The Gaussian probability density function of the density function and the mean M of the Gaussian probability density function 0 and variance V 0 .

[0031] St...

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Abstract

The invention relates to an approaching method of a signal-to-noise ratio flexible message used for the transmission end of a communication system, which comprises the following steps: generating a condition probability density function corresponding to a response message; using a probability distribution model for approaching the condition probability density function for obtaining the probability density function, and the average value and the variance of the probability density function; and generating the second average value and the second variance of a second probability density function according to the average value, the variance, and a first average value and a first variance of a first probability density function. The first probability density function approaches to and corresponds to the condition probability density function of the signal-to-noise ratio of a front data packet, and the second probability density function approaches to and correspond to the condition probability density function of the signal-to-noise ratio of the data packet.

Description

technical field [0001] The invention refers to a method for approaching SNR soft news in a communication system, especially a method for approaching SNR soft news with a probability distribution model. Background technique [0002] In the wireless communication system, in order to achieve the default communication function, the relevant specifications will define multiple groups of modulation and coding schemes (Modulation and Coding Scheme, MCS), including the settings of modulation technology, coding rate and data transmission rate, and Different modulation and coding schemes are distinguished by index numbers. Taking the IEEE 802.11n wireless communication system specification as an example, MCS-15 indicates that the modulation technology used is 64-QAM, the coding rate is 5 / 6, and the data transmission rate varies depending on the bandwidth used is 20MHz or 40MHz. According to various modulation and coding mechanisms defined in relevant specifications, a wireless commun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16H04W28/04H04W28/22
Inventor 杜勇赐陈俊才温俊贤吴承轩林建诚
Owner MEDIATEK INC