Repetition-dependent mapping for higher order modulation schemes
AssigneePanasonic Corporation
InventorsChristian Wengerter, Alexander Golitschek Edler Von Elbwart, Isamu Yoshii
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Abstract
A method and apparatus is disclosed, for digital data transmission using higher order modulation schemes, wherein a plurality of bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of the bit positions. Bits are selected from a data stream of original bits for repetition and repeated. Repeated and unrepeated bits are mapped to modulation symbols, wherein the mapping of bits to bit positions depends on the error probabilities of the bit positions and on the selection result.
Claims23
A method for digital data transmission using higher order modulation schemes, wherein a plurality of transmission bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of said bit positions, the method comprising the steps of:
- a) selecting bits from a data stream of original bits for repetition and repeating the selected bits to obtain a stream of transmission bits;
- b) mapping the transmission bits to modulation symbols, wherein the transmission bits are mapped preferentially to bit positions selected depending on the error probabilities of the bit positions and depending on a selection result of step a), and wherein the transmission bits belonging to an original bit are mapped preferentially to bit positions selected depending on a total number of repetitions of the respective original bit;
- and
- c) modulating a carrier according to the mapped transmission bits.
A method for digital data transmission using higher order modulation schemes, wherein a plurality of transmission bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of said bit positions, the method comprising the steps of:
- a) selecting bits from a data stream of original bits for repetition and repeating the selected bits to obtain a stream of transmission bits;
- b) mapping the transmission bits to modulation symbols, wherein the transmission bits are mapped preferentially to bit positions selected depending on the error probabilities of the bit positions and depending on a selection result of step a), wherein a transmission bit is mapped preferentially to a bit position selected depending on a number of previous transmissions of the respective original bit;
- and
- c) modulating a carrier according to the mapped transmission bits.
A transmitter for digital data transmission using higher order modulation schemes, wherein a plurality of transmission bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of said bit positions, the transmitter comprising:
- a rate matching unit configured to select bits from a data stream of original bits for repetition, and to repeat the selected bits to obtain a stream of transmission bits;
- a mapping unit configured to map the transmission bits to modulation symbols, wherein the transmission bits are mapped preferentially to bit positions selected depending on the error probabilities of the bit positions and depending on a selection result of said rate matching unit, and wherein said mapping unit is further configured to map the transmission bits belonging to an original bit preferentially to bit positions selected depending in addition on a number of transmissions of the respective original bit;
- and
- a modulation unit configured to modulate a carrier according to the mapped transmission bits.
A transmitter for digital data transmission using higher order modulation schemes, wherein a plurality of transmission bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of said bit positions, the transmitter comprising:
- a rate matching unit configured to select bits from a data stream of original bits for repetition, and to repeat the selected bits to obtain a stream of transmission bits;
- a mapping unit configured to map the transmission bits to modulation symbols, wherein the transmission bits are mapped preferentially to bit positions selected depending on the error probabilities of the bit positions and depending on a selection result of said rate matching unit, wherein said mapping unit is further configured to map transmission bits with a lower number of transmissions of the respective original bit preferentially to bit positions with lower error probability having a higher reliability, and to map transmission bits with a relatively higher number of transmissions of the respective original bit preferentially to bit positions with relatively higher error probability having a lower reliability;
- and
- a modulation unit configured to modulate a carrier according to the mapped transmission bits.
Dependencies are inferred from the claim text.