Accumulation left-shift QC-LDPC encoder with partial parallel input in deep space communication

A deep space communication and encoder technology, applied in the field of accumulative left shift QC-LDPC encoder, which can solve the problems of low operating frequency, high power consumption, and high cost, so as to improve operating frequency and throughput, and reduce registers and connections , the effect of reducing power consumption and cost

Inactive Publication Date: 2014-07-02
RONGCHENG DINGTONG ELECTRONICS INFORMATION SCI & TECH CO LTD
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AI Technical Summary

Benefits of technology

This patented technology provides an improved way for transmitting data over wireless networks that uses both Coded Orthogonal Frequency Division Multiplex (COFDM) signals or Layered Code Sequential Multiple Access (LCCSVM). It allows for more efficient use of resources compared to traditional methods like Time Division Duplex (TDD), which requires multiple transmissions per second. Overall this innovation improves efficiency, reduces costs, and enhances performance at any given time.

Problems solved by technology

Technical Problem addressed in this patented technical problem relates to improving the performance of error correction decoding for digital signal processing systems such as CDMA Code Division Multiple Access Codes or Digital Video Broadcasting Dedication Channels (DSRC). Current solutions involve concatenating blocks of data elements together to create a new symbol set, but these methods require multiple copies of each element's original sequence. These approaches also lead to complicated circuit structures due to large number of connection points between components.

Method used

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  • Accumulation left-shift QC-LDPC encoder with partial parallel input in deep space communication
  • Accumulation left-shift QC-LDPC encoder with partial parallel input in deep space communication
  • Accumulation left-shift QC-LDPC encoder with partial parallel input in deep space communication

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Embodiment Construction

[0020] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0021] Let the generator polynomial g i,j =(g i,j,0 , g i,j,1 ,..., g i,j,b-1 ), then G i,j can be viewed as a weighted sum of cyclically right-shifted versions of the identity matrix, namely

[0022] G i,j =g i,j,0 I r(0) +gi,j,1 I r(1) +…+g i,j,b-1 I r(b-1) (4) Then, the i-th term on the right side of the equal sign in formula (2) can be expanded as

[0023] s i G i , j =

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Abstract

The invention provides an accumulation left-shift QC-LDPC encoder with partial parallel input in deep space communication. The encoder comprises 12 generator polynomial searching tables which store all cyclic matrix generator polynomials in all code generator matrixes in advance, 12 2048-bit binary multipliers used for carrying out scalar multiplying on message segments and generator polynomial bits, 12 2048-bit binary adders used for carrying out modulo-2 adding on products and shifting register content, and 12 2048-bit shifting registers used for storing the sum of content subjected to one-bit ring shift left. Finally, verification data are contained in the 12 shifting registers. The encoder with partial codes input in parallel is compatible with all QC-LDPC in a CCSDS deep space communication system, and has the advantages of being few in register, simple in structure, low in power consumption, low in cost, high in work efficiency and large in throughput.

Description

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Claims

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Application Information

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Owner RONGCHENG DINGTONG ELECTRONICS INFORMATION SCI & TECH CO LTD
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