| 摘要 |
The present invention provides a method for dynamically setting virtual subcarriers, a receiving method, apparatus and a system. The setting method includes: acquiring, by a transmitter, dynamic spectrum information of a geographic location where the transmitter is located; determining the number of the left edge virtual subcarriers and the number of the right edge virtual subcarriers of the multicarrier transmission system, according to the dynamic spectrum information, at the left and right edges of a working spectrum of the transmitter, to make a sum of the number of the left edge virtual subcarriers and the number of the right edge virtual subcarriers be not less than an aliasing guard band of a baseband signal of the multicarrier transmission system, and be not greater than a dimension of discrete Fourier transform of the baseband signal; and setting virtual subcarriers of the multicarrier transmission system according to the number of the left edge virtual subcarrier and the number of the right edge virtual subcarriers determined. The virtual subcarriers are dynamically set in the present invention, so that a bandwidth and an occupied spectrum of the baseband signal can adaptively change, a spectrum dynamic range of the baseband signal is expanded, and less software and hardware devices are required for covering a given spectrum. |
