Apparatus and method for reducing peak to average power ratio in a signal
First Claim
1. A method for processing a stream of data modulated into a plurality of symbols in a constellation as part of transmitting a signal, the method comprising:
- applying one of a first type of symbol constellation extension projection to at least one symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the first type of symbol constellation extension projection having an outward angular region from an original position for the at least one symbol in the constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, anda second type of symbol constellation projection to at least one symbol in the constellation if it is determined that the type of constellation is a square constellation, the second type of symbol constellation extension projection representing a line in at least one of an x axis direction and a y axis direction,wherein the applying one of the first type of symbol constellation projection and the second type of symbol constellation projection is determined by a selection of the constellation used as part of the transmitted signal and a code rate used for encoding the stream of data,wherein the applying the first type of symbol constellation or the applying the second type of symbol constellation is determined by the following table;
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Abstract
Methods and apparatuses for processing a signal that is transmitted with a reduced peak to average power ratio are described. The processing includes applying (1650) a first type of symbol constellation extension projection to at least one symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the first type of symbol constellation extension projection having an outward angular region from an original position for the at least one symbol in the constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region.
6 Citations
43 Claims
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1. A method for processing a stream of data modulated into a plurality of symbols in a constellation as part of transmitting a signal, the method comprising:
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applying one of a first type of symbol constellation extension projection to at least one symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the first type of symbol constellation extension projection having an outward angular region from an original position for the at least one symbol in the constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, and a second type of symbol constellation projection to at least one symbol in the constellation if it is determined that the type of constellation is a square constellation, the second type of symbol constellation extension projection representing a line in at least one of an x axis direction and a y axis direction, wherein the applying one of the first type of symbol constellation projection and the second type of symbol constellation projection is determined by a selection of the constellation used as part of the transmitted signal and a code rate used for encoding the stream of data, wherein the applying the first type of symbol constellation or the applying the second type of symbol constellation is determined by the following table; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for processing a stream of data converted into a plurality of symbols in a constellation as part of transmitting a signal, the apparatus comprising:
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a pre-encoder including a projection module, the projection module applying one of a first type of symbol constellation extension projection to at least one symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the first type of symbol constellation extension projection having an outward angular region from an original position for the at least one symbol in the constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, and a second type of symbol constellation projection to at least one symbol in the constellation if it is determined that the type of constellation is a square constellation, the second type of symbol constellation extension projection formed from an original location for a symbol as a line extending in at least one of an x axis direction and a y axis direction, wherein the applying one of the first type of symbol constellation projection and the second type of symbol constellation projection is determined by a selection of the constellation used as part of the transmitted signal and a code rate used for encoding the stream of data, wherein the applying the first type of symbol constellation or the applying the second type of symbol constellation is determined by the following table; - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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15. A method for processing a received signal transmitted as a constellation of symbols representing a data stream, the method comprising:
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demodulating the received signal to provide an estimation of at least one symbol in the transmitted signal, the at least one symbol being included on one of a first extended constellation, the first extended constellation including at least one extended region formed as an outward angular sector from an original location for a symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, and a second extended constellation, the second extended constellation including at least one extended region formed from an original location for a symbol as a line extending in at least on of an x axis direction and a y axis direction, if it is determined that the type of constellation is a square constellation, wherein determining one of the first extended constellation and the second extended constellation is based on a selection of the constellation size used as part of the transmitted signal and a code rate used for encoding the stream of data, wherein the first extended constellation or the second extended constellation is determined by the following table; - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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16. An apparatus for processing a received signal transmitted as a constellation of symbols representing a data stream, the apparatus comprising:
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a demodulator that demodulates the received signal to provide an estimation of at least one symbol in the transmitted signal, the at least one symbol being included on one of a first extended constellation, the first extended constellation including at least one extended region formed as an outward angular sector from an original location for a symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, and a second extended constellation, the second extended constellation including at least one extended region formed from an original location for a symbol as a line extending in at least one of an x axis direction and a y axis direction, if it is determined that the type of constellation is a square constellation, wherein determining one of the first extended constellation and the second extended constellation is based on a selection of the constellation size used as part of the transmitted signal and a code rate used for encoding the stream of data, wherein the first extended constellation or the second extended constellation is determined by the following table; - View Dependent Claims (37, 38, 39, 40, 41, 42, 43)
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17. A non-transitory device readable medium containing instructions for processing a received signal transmitted as a constellation of symbols representing a data stream, comprising:
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demodulating the received signal to provide an estimation of at least one symbol in the transmitted signal, the at least one symbol being included on one of a first extended constellation, the first extended constellation including at least one extended region formed as an outward angular sector from an original location for a symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, and a second extended constellation, the second extended constellation including at least one extended region formed from an original location for a symbol as a line extending in at least one of an x axis direction and a y axis direction, if it is determined that the type of constellation is a square constellation, wherein determining one of the first extended constellation and the second extended constellation is based on a selection of the constellation size used as part of the transmitted signal and the code rate used for encoding the stream of data, wherein the first extended constellation or the second extended constellation is determined by the following table;
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Specification