METHOD FOR MODULATING AND DEMODULATING DATA
First Claim
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1. A method for modulating data using a pulse position modulation manner by a transmitter, comprising:
- reading symbol compositions mapped to input data from a symbol mapping table that includes symbol compositions represented by a plurality of grouped symbols; and
modulating the data using the mapped symbol compositions,wherein the symbol mapping table includesa first symbol composition group including symbol compositions that are composed of a plurality of symbols having burst pulses positioned in all pulse periods.
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Abstract
Disclosed is a method for modulating and demodulating data. The method composes symbols by grouping a plurality of symbols for pulse position modulation to newly add symbol compositions to fixed symbols used for the pulse position modulation of the related art. Further, the method uses grouped symbols to improve data transmission rate as the average amount of information increases.
10 Citations
13 Claims
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1. A method for modulating data using a pulse position modulation manner by a transmitter, comprising:
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reading symbol compositions mapped to input data from a symbol mapping table that includes symbol compositions represented by a plurality of grouped symbols; and modulating the data using the mapped symbol compositions, wherein the symbol mapping table includes a first symbol composition group including symbol compositions that are composed of a plurality of symbols having burst pulses positioned in all pulse periods. - View Dependent Claims (2, 3, 4)
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5. A method for modulating data using a pulse position modulation manner by a transmitter, comprising:
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when a first bit of input data is a first value, determining pulse positions of each of a plurality of grouped symbols corresponding to each of the remaining bits other than the first bit of the input data bits; when the first bit is a second value different from the first value, positioning burst pulses in all the pulse periods of one of a first symbol and a second symbol among the plurality of grouped symbols according to the value of the second bit of the input data; and determining pulse positions of the remaining symbols other than the symbols having the burst pulses in all the pulse periods among the plurality of grouped symbols according to the values of the remaining bits other than the first bit and the second bit of the input data bits. - View Dependent Claims (6, 7, 8)
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9. A method for demodulating data modulated using a pulse position modulation method by a receiver, comprising:
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measuring energy of a plurality of input symbols; determining a value of a first bit according to whether the energy of a first symbol and a second symbol of the plurality of symbols is the same; when the value of the first bit is determined to be a first value, determining the values of the remaining bits other than the first bit according to pulse positions of each of the plurality of symbols; when the value of the first bit is determined to be a second value different from the first value, determining a value of a second bit by comparing the energy of the first symbol and the second symbol; and when the value of the second bit is determined, determining the values of the remaining bits other than the first bit and the second bit according to the pulse positions of the remaining symbols other than one having large energy of the first symbol and the second symbol among the plurality of symbols. - View Dependent Claims (10, 11, 12, 13)
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Specification