| 摘要 |
<p>The embodiments of the present invention provide a method for suppressing out-of-band power in an Orthogonal Frequency Division Multiplexing (OFDM) system, which includes: receiving an OFDM signal; acquiring and adding a noise signal, making the first N-sample time-domain value of the cyclic prefix of the current OFDM signal added with the noise equal to the first N-sample time-domain value of the previous OFDM signal without the cyclic prefix after being added with the noise, and making the norm of said noise signal be the minimum, wherein N is the positive integer less than the length of said cyclic prefix. The embodiments of invention also provide a device for suppressing out-of-band power that is used in a transmitter, which effectively accelerates the out-of-band power suppression, and increases the efficient Cyclic Prefix (CP) length at the same time, thereby increasing the ability of resisting inter-symbol interference.</p> |
