| 摘要 |
PROBLEM TO BE SOLVED: To provide a SIR(Signal Interference Ratio) measurement device that can measure an SIR with high accuracy. SOLUTION: In the SIR measurement method that measures the S/N ratio that is a ratio of a desired power to a noise power or the S/I ratio that is a ratio of the desired power to an interference power, a histogram totalizing device 410 measures a signal voltage level of an I component (in-phase component) or a Q component (quadrature component) resulting from applying orthogonal demodulation to a received signal by an orthogonal demodulator 115 at a prescribed interval to generate the histogram of the distribution, a Gaussian distribution estimate device 420 estimates a sample mean value and a sample variance from the data, and an SIR arithmetic section 430 uses the desired power S and the noise power N or the interference power I to calculate and output the S/N ratio or the S/I ratio. |
