Multidimensional TCM (Trellis Coded Modulation) decoder
A decoder and decoding technology, applied in the field of TCM decoding, can solve problems such as unfavorable high-speed hardware implementation, and achieve the effects of reducing implementation complexity, less hardware resources, and improving transmission efficiency
Active Publication Date: 2012-07-25
XIAN INSTITUE OF SPACE RADIO TECH
View PDF2 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It is very unfavorable for high-speed hardware implementation
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] Such as figure 1 Shown is the multi-dimensional TCM decoder of the present invention, including a control module, a synchronization detection module, a branch measurement module, an auxiliary grid module, an ACS module, a backtracking module and a difference module. Among them, the branch metric module, the auxiliary grid module, the ACS module and the backtracking module constitute the decoding structure part of the decoder.
[0028] The control module synchronizes and sorts the input decoded data according to the data synchronization signal or data out-of-sync signal input by the synchronization detection module, and then inputs it into the decoding structure of the decoder. After the input decoding data of the multidimensional TCM decoder of the present invention is divided into I and Q two paths, it can be divided into multi-path parallel data on the I path or the Q path respectively. The input signals used to generate data synchronization signals or data out-of-sy...
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
Login to View More Abstract
The invention discloses a multidimensional TCM (Trellis Coded Modulation) decoder which comprises a control module, a synchronization detection module, a branch metric module, an auxiliary trellis module, an ACS module, a recall module and a differential module, wherein the synchronization detection module is used for counting path metric normalization signals according to a hard decision codon generated by the auxiliary trellis module, a path metric normalization signal generated by the ACS module, and a decoding codon generated by the recall module, generating a data synchronization signal and outputting the data synchronization signal to the control module if the difference of the decoding codon and the hard decision codon is less than a threshold M when a counted value reaches a counting threshold N, and generating a data out-of-step signal and outputting the data out-of-step signal to the control module if the difference of the decoding codon and the hard decision codon is more than the threshold M when a counted value reaches the counting threshold N; and the control module is used for sequencing and then outputting input synchronization decoding data or sequencing and then outputting the out-of-step decoding data subjected to delay synchronization when receiving the data synchronization signal or data out-of-step signal. The invention can realize blind synchronization of the input decoding data by using an intermediate result of the decoder without causing loss to the performance of the decoder.
Description
technical field [0001] The invention belongs to the technical field of TCM decoding, and relates to a multi-dimensional TCM decoder. Background technique [0002] In the past, the coding technology was to increase the system bandwidth in exchange for coding gain, which is suitable for occasions with rich bandwidth such as deep space communication and early satellite communication, but for strictly limited bandwidth such as telephone communication and massive high-speed data transmission. The system is not very suitable. Especially today, on the one hand, high data rates require high bandwidth efficiency of the system, and on the other hand, cost or mobility require small antennas and low transmit power. The advent of TCM (Trellis Coded Modulation) technology provides a solution to the above two aspects. [0003] When TCM is used for high-speed data transmission, if two-dimensional TCM with the same encoding symbol rate and modulation symbol rate is used, the processing spe...
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
Login to View More IPC IPC(8): H03M13/00
Inventor 谢天骄靳凡宋颖刘洁杨新权
Owner XIAN INSTITUE OF SPACE RADIO TECH