Device and method for receiving with at least two reception channels, and corresponding use

A device for the reception of a multicarrier signal, formed by a set of carrier frequencies, said device implementing at least two reception paths supplied with data flows, each conveying a same source symbol (xk(n)), each of said reception paths comprising an estimator associating with each source symbol received, an estimated path value and a corresponding path confidence information element,

• said source symbols being conveyed by a subset of said set of carrier frequencies,
• said device comprising means for combining said estimated path values delivering:
• an adapted estimated value, obtained from said estimated path values, in taking account of said corresponding path confidence information element to weight said estimated path values, and;
• an adapted confidence information element, as a sum of said path confidence information elements, said device further comprising:
• a weighted-input decoder supplied by said adapted estimated value, wherein said means for combining computes said adapted confidence information element as follows:
• cnfd
• Adap
• ,
• n
• =
• ∑
• i
• =
• 1
• N
• ⁢
• ⁢
• cnfd
• i
• ,
• n
• where:
• cnfdi,n is the corresponding path confidence information element associated with the path i;
• and
• N is the number of paths.

A method for the reception of a multicarrier signal, formed by a set of carrier frequencies transmitted simultaneously, implementing at least two reception paths supplied with data flows, each conveying the same source symbols, each of said paths implementing a step of estimating of a transmission channel associating, with each source symbol received, an estimated path value and a corresponding path confidence information element a source symbol being conveyed by a subset of said set of carrier frequencies, said method comprising:

• a combination step of delivering:
• an adapted estimated value, obtained from said estimated path values in taking account of said corresponding path confidence information element to weight said estimated path values;
• and
• an adapted confidence information element with each of said adapted estimated values, wherein said adapted estimated value is computed as follows:
• x
• ^
• Adap
• ,
• n
• =
• (
• ∑
• i
• =
• 1
• N
• ⁢
• ⁢
• cnfd
• i
• ,
• n
• ×
• x
• ^
• i
• ,
• n
• )
• /
• (
• ∑
• i
• =
• 1
• N
• ⁢
• ⁢
• cnfd
• i
• ,
• n
• )
• where:
• {circumflex over (x)}i,n is the estimated value of the symbol received on the path i,
• cnfdi,n is the corresponding path confidence information element, and
• N is the number of paths;
• and
• a step of weighted-input decoding, taking into account said adapted estimated values.

A method for the reception of a multicarrier signal, formed by a set of carrier frequencies transmitted simultaneously, implementing at least two reception paths supplied with data flows, each conveying the same source symbols, each of said paths implementing a step of estimating of a transmission channel associating, with each source symbol received, an estimated path value and a corresponding path confidence information element, a source symbol being conveyed by a subset of said set of carrier frequencies, said method comprising:

• combining and delivering:
• an adapted estimated value, obtained from said estimated path values in taking account of said corresponding path confidence information element to weight said estimated path values, and
• an adapted confidence information element with each of said adapted estimated values, wherein said adapted confidence information element is computed as follows:
• cnfd
• Adap
• ,
• n
• =
• ∑
• i
• =
• 1
• N
• ⁢
• ⁢
• cnfd
• i
• ,
• n
• where:
• cnfdi,n is the corresponding path confidence information element associated with the path i, and
• N is the number of paths;
• and
• weighted-input decoding, taking into account said adapted estimated values.