| 摘要 |
A method for measuring channel signal-to-noise ratio (SNR) is provided by the present invention, which includes: extracting a Ranging sub-carrier sequence received from the designated access code (Ranging) area from Orthogonal Frequency Division Multiplexing (OFDM) signals received from a transmitting side; performing a correlation operation on the Ranging sub-carrier sequence and a pseudo-random code sequence locally generated to obtain the corresponding correlation sequence, and calculating power value of each sample point in the correlation sequence; calculating total power of the receiving signal and effective signal of the Ranging sub-carrier sequence according to the power value of each sample point; calculating total power of the noise signal according to the obtained total power of the receiving signal and the effective signal, and obtaining the system SNR according to the total power of the effective signal and the noise signal. Also, a device for measuring the system SNR is provided by the present invention. By applying the present invention, the system operation resource can be saved effectively, the system execution efficiency can be improved, and the system performance can be promoted. |
