Apparatus and method for digital wireless communications
First Claim
1. A digital wireless communication method comprising:
- modulating a pilot symbol according to a first modulation scheme;
modulating specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme;
modulating symbols other than said pilot symbol and said specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes; and
order controlling such that said specific symbols are inserted immediately before and after said pilot symbol;
wherein signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram; and
wherein the signal point of the pilot symbol is allocated on an in-phase axis or a quadrature axis.
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Accused Products
Abstract
A digital wireless communication apparatus includes a first modulator that modulates a pilot symbol according to a first modulation scheme, and a second modulator that modulates specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme. A third modulator modulates symbols other than the pilot symbol and the specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes. A timing controller controls timing such that the specific symbols are inserted immediately before and after the pilot symbol. The signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram.
66 Citations
6 Claims
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1. A digital wireless communication method comprising:
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modulating a pilot symbol according to a first modulation scheme; modulating specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme; modulating symbols other than said pilot symbol and said specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes; and order controlling such that said specific symbols are inserted immediately before and after said pilot symbol; wherein signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram; and wherein the signal point of the pilot symbol is allocated on an in-phase axis or a quadrature axis. - View Dependent Claims (2, 3)
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4. A digital wireless communication apparatus comprising:
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a first modulator that modulates a pilot symbol according to a first modulation scheme; a second modulator that modulates specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme; a third modulator that modulates symbols other than said pilot symbol and said specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes; and an order controller that controls order such that said specific symbols are inserted immediately before and after said pilot symbol; wherein signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram; and wherein the signal point of the pilot symbol is allocated on an in-phase axis or a quadrature axis. - View Dependent Claims (5, 6)
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Specification