| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve transmission efficiency by preventing interference between different networks, when performing data transmission of a multicarrier communications system. <P>SOLUTION: A transmitter 10 includes phase vector setting unit 11 and multicarrier modulator 12. The phase vector setting unit 11 makes the phase of transmission data, corresponding to each subcarrier signal in an OFDM multicarrier signal, rotate by generating a randomized phase vector for each subcarrier signal. The multicarrier modulator 12 modulates the multicarrier signal as transmission data, by using an inverse-Fourier transform or an inverse wavelet transform. The phase vector setting unit 11 changes a phase vector, according to the status of transmission line or the statuses of other networks. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
