Patent ID: 8284868

Claim:
A device for modulating input bit information, comprising: a modulation symbol generator for modulating the bit information and generating a modulation symbol by using one first base signal axis and one second base signal axis from among a plurality of first base signal axes including a cosine function and a plurality of second base signal axes including a sine function, wherein the plurality of first base signal axes comprise a signal axis that is a product of the cosine function and a first pulse signal, and a signal axis that is a product of the cosine function and a second pulse signal, and the plurality of second base signal axes comprise a signal axis that is a product of the sine function and the first pulse signal, and a signal axis that is a product of the sine function and the second pulse signal, wherein the first pulse signal and the second pulse signal each comprise a sound signal and a silence signal, and the first pulse signal and the second pulse signal are inverted with respect to each other; and a transmitter for transmitting the generated modulation symbol.