Transmission apparatus, reception apparatus and digital radio communication method
First Claim
1. A transmission apparatus comprising:
- a frame configuration determiner that determines a modulation scheme, from among a plurality of modulation schemes;
a first symbol generator that modulates a transmission signal according to the modulation scheme determined by the frame configuration determiner, to generate a first symbol, the first symbol being a first quadrature baseband signal; and
a second symbol generator that modulates a pilot signal in accordance with a specific modulation scheme to generate a second symbol, anda third symbol generator that generates a third symbol to be inserted immediately before or immediately after the second symbol, the third symbol being different from the first symbol,wherein, on a signal space diagram, the third symbol generator arranges a signal point of the third symbol on a virtual line that links an origin with a signal point of the second symbol.
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Abstract
A transmission apparatus includes a frame configuration determiner that determines a modulation scheme, from among a plurality of modulation schemes. A first symbol generator modulates a transmission signal according the modulation scheme determined by the frame configuration determiner to generate a first symbol, the first symbol being a first quadrature baseband signal. A second symbol generator modulates a pilot signal in accordance with a specific modulation scheme to generate a second symbol. A third symbol generator generates a third symbol to be inserted immediately before or immediately after the second symbol, the third symbol being different from the first symbol. On a signal space diagram, the third symbol generator arranges a signal point of the third symbol on a virtual line that links an origin with a signal point of the second symbol.
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Citations
10 Claims
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1. A transmission apparatus comprising:
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a frame configuration determiner that determines a modulation scheme, from among a plurality of modulation schemes; a first symbol generator that modulates a transmission signal according to the modulation scheme determined by the frame configuration determiner, to generate a first symbol, the first symbol being a first quadrature baseband signal; and a second symbol generator that modulates a pilot signal in accordance with a specific modulation scheme to generate a second symbol, and a third symbol generator that generates a third symbol to be inserted immediately before or immediately after the second symbol, the third symbol being different from the first symbol, wherein, on a signal space diagram, the third symbol generator arranges a signal point of the third symbol on a virtual line that links an origin with a signal point of the second symbol. - View Dependent Claims (2, 3, 4, 5)
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6. A digital radio communication method of a transmission apparatus including a frame configuration determiner, a first symbol generator, a second symbol generator and a third symbol generator, the communication method comprising:
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determining a modulation scheme, from among a plurality of modulation schemes by the frame configuration determiner; modulating, by the first symbol generator, a transmission signal according to the determined modulation scheme to generate a first symbol, the first symbol being a first quadrature baseband signal; modulating, by the second symbol generator, a pilot signal according to a specific modulation scheme to generate a second symbol; generating, by the third symbol generator, a third symbol to be inserted immediately before or immediately after the second symbol, the third symbol being different from the first symbol; and arranging, by the third symbol generator, on a signal space diagram, a signal point of the third symbol on a virtual line that links an origin with a signal point of the second symbol. - View Dependent Claims (7, 8, 9, 10)
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Specification