Method for transmitting a multicarrier signal designed for limiting interference, signal, emitting device, receiving method and device and corresponding computer programs

A method comprising:

• producing a multicarrier signal formed by a temporal succession of symbols comprising a set of data elements, each of said data elements modulating a carrier frequency of said signal, said data elements comprising firstly reference data elements called pilots, a value at transmission of at least certain of said pilots being known to at least one receiver designed to carry out a reception of said signal and secondly informative data elements, a value at transmission of said informative data elements being not known a priori to said receiver or receivers,
• one of said carrier frequencies modulated at a given instant by one of said data elements being called a carrier,
• wherein said signal comprises a set of at least two data elements to be protected, said data elements to be protected being spaced out two by two from at most one carrier in time and at most one carrier in frequency,
• at least one value being assigned to at least one data element of a contour ring constituted by said carriers that are immediately adjacent to said data elements to be protected to reduce an interference affecting said data elements to be protected, at reception,
• said interference taking account of the value of said data elements to be protected and of the values of the data elements of said contour ring, and
• transmitting the signal.

Method comprising receiving a multicarrier signal formed by a temporal succession of symbols comprising a set of data elements, each of said data elements modulating a carrier frequency of said signal, said data elements comprising firstly reference data elements called pilots, a value at transmission of at least certain of said pilots being known to at least one receiver designed to carry out a reception of said signal and secondly informative data elements, a value at transmission of said informative data elements being not known a priori to said receiver or receivers, one of said carrier frequencies modulated at a given instant by one of said data elements being called a carrier, wherein said received signal comprising at least two data elements to be protected, said data elements being spaced out two by two from at most one carrier in time and at most one carrier in frequency, a processing operation being done before transmission on the signal so as to assign at least one value to at least one data element of a contour ring constituted by said carriers that are immediately adjacent to the data elements to be protected to reduce an interference affecting said data elements to be protected, said method further comprising:

• a step of estimation of a transfer function of a transmission channel, from at least certain of said data elements to be protected;
• and
• a step of retrieval of said data elements of said contour ring implementing a processing that is the reverse of said processing done before transmission.

Device for reception of a multicarrier signal formed by a temporal succession of symbols comprising a set of data elements, each of said data elements modulating a carrier frequency of the signal, said data elements comprising firstly reference data elements called pilots, a value at transmission of at least certain of said pilots being known to at least one receiver designed to carry out a reception of said signal and secondly informative data elements, a value at transmission of said informative data elements being not known a priori to said receiver or receivers, one of said carrier frequencies modulated at a given instant by one of said data elements being called a carrier, wherein said received signal comprises at least two data elements to be protected, said data elements being spaced out two by two from at most one carrier in time and at most one carrier in frequency, a processing operation being done before transmission on said signal so as to assign at least one value to at least one data element of a contour ring constituted by said carriers that are immediately adjacent to said data elements to be protected to reduce an interference affecting said data elements to be protected, and wherein said device comprises:

• means of estimation of a transfer function of a transmission channel, from at least certain of said data elements to be protected;
• and
• means of retrieval of said data elements of said contour ring implementing a processing that is the reverse of the processing done before transmission.

Computer program product stored on a computer-readable carrier and executable by a microprocessor comprising program code instructions which, when executed perform a method for transmission of a multicarrier signal formed by a temporal succession of symbols comprising a set of data elements, each of said data elements modulating a carrier frequency of said signal, said data elements comprising firstly reference data elements called pilots, a value at transmission of at least certain of said pilots being known to at least one receiver designed to carry out a reception of this signal and secondly informative data elements, a value at transmission of said informative data elements being not known a priori to said receiver or receivers, one of said carrier frequencies modulated at a given instant by one of said data elements being called a carrier wherein the method comprises:

• computing an interference affecting a set of at least two data elements to be protected, said data elements to be protected being spaced out two by two from at most one carrier in time and at most one carrier in frequency,
• said interference taking account of the value of said data elements to be protected and of the values of the data elements of a contour ring constituted by said carriers that are immediately adjacent to said data elements to be protected;
• and
• determining at least one value to be assigned to at least one data element of said contour ring, to reduce said computed interference at reception.

Computer program product stored on a computer-readable carrier and executable by a microprocessor comprising program code instructions which, when executed, perform a method of receiving a multicarrier signal formed by a temporal succession of symbols comprising a set of data elements, each of said data elements modulating a carrier frequency of said signal, said data elements comprising firstly reference data elements called pilots, a value at transmission of at least certain of said pilots being known to at least one receiver designed to carry out a reception of said signal and secondly informative data elements, a value at transmission of said informative data elements being not known a priori to said receiver or receivers, one of said carrier frequencies modulated at a given instant by one of said data elements being called a carrier, wherein said received signal comprising at least two data elements to be protected, said data elements being spaced out two by two from at most one carrier in time and at most one carrier in frequency, a processing operation being done before transmission on the signal so as to assign at least one value to at least one data element of a contour ring constituted by said carriers that are immediately adjacent to the data elements to be protected to reduce an interference affecting said data elements to be protected, said method comprising:

• estimating a transfer function of a transmission channel, from at least certain of said data elements to be protected;
• and
• retrieving said data elements of said contour ring implementing a processing that is the reverse of said processing done before transmission.