Method for transmitting data via the lines of a power supply system
First Claim
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1. Method for transmitting data via the lines of a power supply system, particularly at low- and medium-voltage level, comprising the following steps:
- encoding data to be transmitted into the form of symbols (A, . . . , F) by applying a forward error correction code;
duplicating each one of said symbols (A, . . . F) a given number of times;
rearranging said duplicated symbols (A, . . . F) so that symbols previously located directly adjacently to each other are then a far distance from each other;
combining said rearranged symbols into blocks so that each symbol is at least in two different blocks;
transmitting said blocks by means of different carrier frequencies in order to reduce the error rate during transmission;
wherein the different carrier frequencies are modulated by means of phase shift keying.
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Abstract
A method for transmitting data via the power system line of a power supply system by carrier frequency modulation, wherein an improvement in the reliability of transmission is achieved by transmitting the same information several times in succession (time diversity) of different carrier frequencies (frequency diversity). Additional coding of the data by a "forward error correction code" results in further improvement.
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Citations
6 Claims
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1. Method for transmitting data via the lines of a power supply system, particularly at low- and medium-voltage level, comprising the following steps:
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encoding data to be transmitted into the form of symbols (A, . . . , F) by applying a forward error correction code; duplicating each one of said symbols (A, . . . F) a given number of times; rearranging said duplicated symbols (A, . . . F) so that symbols previously located directly adjacently to each other are then a far distance from each other; combining said rearranged symbols into blocks so that each symbol is at least in two different blocks; transmitting said blocks by means of different carrier frequencies in order to reduce the error rate during transmission; wherein the different carrier frequencies are modulated by means of phase shift keying. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification