ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING TECHNOLOGY-BASED METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DATA

摘要

Disclosed are an OFDM technology-based method and device for transmitting and receiving data. In the method, when transmitting data, a maximum sampling rate supported by a data transmission system is determined on the basis of the number of antennae in the data transmission system, of the data width, and of the optical fiber transmission capacity of the data transmission system; the maximum length of an IFFT/FFT is determined on the basis of the maximum sampling rate determined; a value is selected within the interval between the number of sub-carriers and the maximum length as length information of the IFFT/FFT; and the IFFT and the FFT are performed on the basis of the length information. This allows for effectively reduced sampling rate for the system, thus ensuring that the data transmission speed of the optical fiber does not exceed the transmission capacity of the optical fiber, and achieving the goal of conserving equipment costs.