Patent ID: 7379851

Claim:
A CDMA signal waveform quality display system, comprising: an orthogonal transformer configured to orthogonally transform a digital measurement signal in each channel into a base band signal and to correct a carrier frequency error; a demodulator configured to demodulate the measurement signal in each channel corrected by said orthogonal transformer to afford demodulated data and an amplitude value; an ideal signal generator configured to generate an ideal signal in each channel from said demodulated data, said amplitude value, and estimated parameters; a parameter estimator configured to estimate various parameters in each channel from said ideal signal in each channel and the corrected measurement signal in each channel; an optimizer configured to, using said estimated parameters, perform the correction in said orthogonal transformer and the generation of the ideal signal in said ideal signal generator, and to further perform the processings in said demodulator and said parameter estimator, the optimizer being further configured to repeat said correction, demodulation, and estimation until said estimated parameters are optimized; a power coefficient calculator configured to calculate a power coefficient of the measurement signal in each channel in the optimized state in said optimizer; a noise power coefficient calculator configured to calculate a noise coefficient channel by channel; and a calculation result display configured to determine a signal power and a noise power on the basis of the power coefficient in each channel calculated in said power coefficient calculator and the noise power coefficient in each channel calculated in said noise power coefficient calculator and to display said signal power and noise power on a single display.