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Concatenated repetition code with convolutional code

A convolutional coding and outer coding technology, which is applied in the field of coding messages using link repetition codes, can solve problems such as noise and achieve the effect of reliable communication

Inactive Publication Date: 2012-07-11
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disclosure describes a new decoding scheme with concatenated repetition codes that solves the problem of correlating transmission via noisy MV and LV power lines

Method used

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  • Concatenated repetition code with convolutional code
  • Concatenated repetition code with convolutional code
  • Concatenated repetition code with convolutional code

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Embodiment Construction

[0039] The present invention is now described more fully herein with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Those skilled in the art may be able to utilize various embodiments of the present invention.

[0040] FIG. 2 illustrates a PRIME PHY R1.3E transmitter 200 according to the existing PRIME standard. The PHY layer receives PHY layer Protocol Data Unit (PPDU) input from the Media Access Control (MAC) layer. The PPDU goes through a cyclic redundancy check (CRC) block 201 , then is decoded in a convolutional decoder 202 and scrambled in a scrambler 203 . The output of scrambler 203 is interleaved in interleaver 204 and then modulated in subcarrier modulator 205 . ...

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Abstract

A system and method for modulating and coding a signal is disclosed. Data from a Media Access Control (MAC) layer is convolutionally encoded (1103). Robust coding (1102, 1104) of the data from the MAC layer is performed either before or after the convolutional encoding (1103). The coded data is differentially modulating (1107) and then Orthogonal Frequency Division Multiplexed (1108) to create an OFDM output signal adapted to be transmitted on a power line network. The robust coding may be a repetition 2 coding (1104) or a repetition N coding (1102). The robust coding may add an outer code (1102) prior to the convolutional encoding (1103). The robust coding may be Reed Solomon coding (1102) performed prior to the convolutional encoding (1102). An optional header (702) for identifying the robust coding is also disclosed along with a method for decoding the header (702).

Description

technical field [0001] Embodiments of the invention relate generally to communication systems, and more particularly to methods of encoding messages using concatenated repetition codes. Background technique [0002] There is great interest in reducing the cost of reliable communication in the use of power lines as a communication medium. This is generally referred to as Power Line Communication (PLC). There have been PLC standardization efforts such as Powerline Related Smart Metering Evolution (PRIME), a draft standard for powerline technology based on OFDM (Orthogonal Frequency Division Multiplexing) operating in the 40-90kHz CENELEC A-band. The current or existing PRIME standard referred to herein is the draft PRIME R1.3E standard ("PRIME R1.3E") and earlier versions developed by the PRIME Alliance Technical Working Group. [0003] Figure 1 illustrates a typical power distribution system connecting a substation 101 to residences 102a-n. Medium voltage (MV) power lines ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04B2203/5408H04B3/542H04B2203/5416H04B2203/5466H04L1/0041H04L1/0065H04L1/0072H04L1/0075H04L27/2601
Inventor I·H·金B·N·瓦拉达拉贾恩A·G·达巴克
Owner TEXAS INSTR INC