Transmitted-signal producing method, communicating method, and data structure of transmitted signal

摘要

When transmission data is modulated via spread spectrum, not a spreading sequence itself but a transmission data sequence is processed to make the periodic spectrum of a transmission signal a non-correlated spectrum to reduce an increase in the amplitude of the signal and to reduce the dynamic range of an amplifier on a receiving side. A transmission signal production method comprises the steps of multiplying the transmission data by the coefficients of a predetermined coefficient sequence to produce a plurality of transmission data; and adding 0 data of a predetermined length between the plurality of transmission data, produced by multiplying the transmission data by the coefficients, to produce a transmission data sequence.