Patent ID: 7974180

Claim:
A transmitter of a wideband radio channel measuring device for transmitting radio channel information in an orthogonal frequency division multiplexing radio channel measuring system, the transmitter comprising: a serial/parallel converter for converting a measurement signal into a discrete parallel signal; an inverse fast Fourier transform unit for transforming the converted parallel signal into a transmission signal modulated by using a multi-carrier on a measurement bandwidth; a guard interval adder for adding a guard interval to the transformed transmission signal; and a parallel/serial converter for converting the transmission signal having the guard interval into a serial signal in a time domain, and externally transmitting it through a transmission antenna, wherein the transmission signal X(n) is given as x ⁡ ( n ) = Es N ⁢ ∑ k = 0 P - 1 ⁢ ⁢ d k ⁢ ⅇ j2π ⁢ ⁢ k / N , ⁢ - L ≤ n ≤ N - 1 (here, Es denotes an orthogonal frequency division multiplexing symbol energy, N denotes a size of fast Fourier transform (FFT), P denotes the number of active subcarriers, d k denotes the received data or pilot signal, and L denotes a length of the guard interval.