Radio communication apparatus and radio communication method
First Claim
Patent Images
1. A radio communication apparatus comprising:
- a receiver, which, in operation, receives control information indicating a number of bits;
a generator, which, in operation, generates a bit sequence by forcibly setting each of the number of bits indicated by the control information of a plurality of bits to a 1, the plurality of bits forming a modulation symbol in the bit sequence; and
a modulator, which, in operation, modulates the bit sequence by mapping the plurality of bits on a single modulation mapper, the single modulation mapper having first signal points,wherein said generator forcibly sets each of the number of bits to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, a distance between the second signal points being equivalent to a largest of distances existing among the first signal points in an I-Q plane of the single modulation mapper.
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Abstract
Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into ‘1’ or ‘0’. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated.
23 Citations
24 Claims
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1. A radio communication apparatus comprising:
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a receiver, which, in operation, receives control information indicating a number of bits; a generator, which, in operation, generates a bit sequence by forcibly setting each of the number of bits indicated by the control information of a plurality of bits to a 1, the plurality of bits forming a modulation symbol in the bit sequence; and a modulator, which, in operation, modulates the bit sequence by mapping the plurality of bits on a single modulation mapper, the single modulation mapper having first signal points, wherein said generator forcibly sets each of the number of bits to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, a distance between the second signal points being equivalent to a largest of distances existing among the first signal points in an I-Q plane of the single modulation mapper. - View Dependent Claims (2, 3, 4, 5)
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6. A radio communication apparatus comprising:
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a receiver, which, in operation, receives control information indicating a number of bits; a generator, which, in operation;
generates a bit sequence by forcing setting each of the number of bits indicated by the control information of a plurality of bits to a 1, the plurality of bits forming a modulation symbol in the bit sequence; anda modulator, which, in operation, modulates the bit sequence by mapping the plurality of bits on a single modulation mapper, the single modulation mapper having first signal points, wherein said generator forcibly sets each of the number of bits to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, such that said modulation symbol is detected by positive or negative decision only with respect to at least one of an I-axis and a Q-axis in the single modulation mapper. - View Dependent Claims (7, 8, 9, 10)
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11. A radio communication apparatus comprising:
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a transmitter, which, in operation, transmits control information indicating a number of bits; and a receiver, which, in operation, receives a bit sequence, in which each of the number of bits indicated by the control information of a plurality of bits is forcibly set to a 1 and which is modulated by mapping the plurality of bits on a single modulation mapper, wherein the plurality of bits forms a modulation symbol in the bit sequence, and the single modulation mapper has first signal points, wherein each of the number of bits is forcibly set to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, a distance between the second signal points being equivalent to a largest of distances existing among the first signal points in an I-Q plane of the single modulation mapper. - View Dependent Claims (12, 13, 14, 15)
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16. A radio communication apparatus comprising:
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a transmitter, which, in operation, transmits control information indicating a number of bits; and a receiver, which, in operation, receives a bit sequence, in which each of the number of bits indicated by the control information of a plurality of bits is forcibly set to a 1 and which is modulated by mapping the plurality of bits on a single modulation mapper, wherein the plurality of bits forms a modulation symbol in the bit sequence, and the single modulation mapper has first signal points, wherein each of the number of bits is forcibly set to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, such that said modulation symbol is detected by positive or negative decision only with respect to at least one of an I-axis and a Q-axis in the single modulation mapper. - View Dependent Claims (17, 18, 19, 20)
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21. A radio communication method comprising:
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receiving control information indicating a number of bits; generating a bit sequence by forcibly setting each of the number of bit(s) indicated by the control information of a plurality of bits to a 1, the plurality of bits forming a modulation symbol in the bit sequence; and modulating the bit sequence by mapping the plurality of bits on a single modulation mapper, the single modulation mapper having first signal points, wherein each of the number of bits is forcibly set to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, a distance between the second signal points being equivalent to a largest of distances existing among the first signal points in an I-Q plane of the single modulation mapper.
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22. A radio communication method comprising:
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receiving control information indicating a number of bits; generating a bit sequence by forcibly setting each of the number of bits indicated by the control information of a plurality of bits to a 1, the plurality of bits forming a modulation symbol in the bit sequence; and modulating the bit sequence by mapping the plurality of bits on a single modulation mapper, the single modulation mapper having first signal points, wherein each of the number of bits is forcibly set to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, such that said modulation symbol is detected by positive or negative decision only with respect to at least one of an I-axis and a Q-axis in the single modulation mapper.
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23. A radio communication method comprising:
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transmitting control information indicating a number of bits; and receiving a bit sequence, in which each of the number of bits indicated by the control information of a plurality of bits is forcibly set to a 1 and which is modulated by mapping the plurality of bits on a single modulation mapper, wherein the plurality of bits forms a modulation symbol in the bit sequence, and the single modulation mapper has first signal points, wherein each of the number of bits is forcibly set to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, a distance between the second signal points being equivalent to a largest of distances existing among the first signal points in an I-Q plane of the single modulation mapper.
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24. A radio communication method comprising:
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transmitting control information indicating a number of bits; and receiving a bit sequence, in which each of the number of bits indicated by the control information of a plurality of bits is forcibly set to a 1 and which is modulated by mapping the plurality of bits on a single modulation mapper, wherein the plurality of bits forms a modulation symbol in the bit sequence, and the single modulation mapper has first signal points, wherein each of the number of bits is forcibly set to the 1 in a way that the plurality of bits are mapped to one of second signal points, which are a part of the first signal points, such that said modulation symbol is detected by positive or negative decision only with respect to at least one of an I-axis and a Q-axis in the single modulation mapper.
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Specification