Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for forming a bit log-likelihood ratio from symbol log-likelihood ratio

A technology of log likelihood ratio and bit logarithm, applied in the field of communication, can solve problems such as increasing computational complexity

Inactive Publication Date: 2012-05-16
TSINGHUA UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, introducing channel state information will increase the computational complexity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for forming a bit log-likelihood ratio from symbol log-likelihood ratio
  • Method for forming a bit log-likelihood ratio from symbol log-likelihood ratio
  • Method for forming a bit log-likelihood ratio from symbol log-likelihood ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Before describing the specific implementation details of the present invention, it should be noted that the specific embodiment exists in the combination of method steps and device components. It involves using only addition and subtraction operations to obtain bit pairs from the sign log likelihood ratio. Calculation of number likelihood ratio. Therefore, in the figure, common symbols are used to give the device components and method steps, and details that are helpful to understand the specific embodiments of the present invention are described in detail, so as to avoid misunderstandings about these details and make it easy for those of ordinary skill in the art to understand , And benefit from it.

[0022] In this specification, related terms, such as first and second, top and bottom, and similar terms, may be used separately to distinguish between different entities or processes, and it does not mean that these entities or processes must be required or implied. The re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for forming a bit log-likelihood ratio from symbol log-likelihood ratio which belongs to communication technique field. In an OFDM (Orthogonal frequency-division multiplexing) communication system, a receiver comprising an inner forward error correction device, or an inner forward error correction device is provided. Either the inner forward error correction device, or the outer forward error correction device comprises an improved method for deriving a bit log-likelihood ratio derived from a symbol log-likelihood ratio. The method includes the steps of: providing two simplified parameters; and using the two simplified parameters in addition and subtraction only to derive the bit log-likelihood ratio derived from the symbol log-likelihood ratio.

Description

[0001] References to related applications [0002] The invention claimed in this application was published on July 25, 2006, with the provisional application number 60 / 820,319, entitled "LDPC Receiver in TDS-OFDM Communication System". Therefore, the present invention claims the rights under 35USC§119(e) of the U.S. Provisional Application, and the above-mentioned applications involved are hereby combined into one body. Technical field [0003] The present invention relates to the field of communication technology, and more particularly, the present invention relates to a method for obtaining a bit log-likelihood ratio (LLR, log-likehood ratio). Background technique [0004] Orthogonal Frequency Division Multiplexing (OFDM) is a known and public technology. The U.S. Patent No. 3,488,445 granted to Chang et al. describes an orthogonal frequency division multiplexing device and method that implements frequency division multiplexing of a large number of data signals on a large number ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L27/26H04L27/38H04L25/06
CPCH04L27/38H04L25/067
Inventor 钟彦张超
Owner TSINGHUA UNIV