(1) Four observations were excluded because of low signal-to-noise ratio or background subtraction problems.

(2) The test data of bit error rate and signal-to-noise ratio show that the performance of the receiver terminal is available, which guarantees the accuracy of the data after the forward error correction.

(3) The actual signal-to-noise ratio criterion of photon correlation spectrum, its building-up process and its shortages were summarized.

(4) The theoretical formula of output signal-to-noise ratio involving quantization noise and round-off noise are derived.

(5) Test results showed that noises were depressed well, signal-to-noise ratio was improved obviously, and flaw location accuracy and longitudinal resolution were improved by using the method.

(6) The peak signal-to-noise ratio(PSNR)of the reconstructed image is improved compared to still image compression algorithm of MPEG-4at the same bit ratio.

(7) Brightness, signal-to-noise ratio, viewing angle and monochromaticity are the main quality index of a hologram.

(8) The result improves on that the peak signal-to-noise ratio and the visual effect of image restoration via the proposed process. The rapid speed based on convolution ensures real-time of the algorithm.

(9) And when the signal-to-noise rate is under some value, separated signals will be bad.

(10) In order to calculate the signal-to-noise ratio, a calculation method for output noise power spectrum in an active integrator and clamp circuit is presented.

(11) Since the amount of information to be conveyed remains much the same this means that the signal-to-noise ratio will be worse.

(12) It is possible to detect individual pulses from this millisecond pulsar with high signal-to-noise ratio in unbroken trains.

(13) The simulation results indicate that the new algorithm greatly improves the peak signal-to-noise ratio (PSNR) of the reconstructed image compared with EZW.

(14) The time frequency difference between grain noise and defect signal provide a possibility for enhancement of signal-to-noise ratio(SNR) in ultrasonic testing.

(15) The results of field test showed that adopting cascade geophone pattern can be results of good continuation of phase, enhanced amplitude and high signal-to-noise ratio on the records.

(16) The radiofrequency coil, as the first stage of the receive chain, is the main factor of signal-to-noise ratio.

(17) The microphone is used in a data acquisition system on a personal computer. The phonocardiogram and speech signals possessing high signal-to-noise ratio can be obtained.

(18) In order to emulate and evaluate the system performance, the signal-to-noise (SNR) and probability of detection (Pd) vs. the gain and threshold voltage of APD arrays were discussed in this paper.

(19) Finally, the table of the optimal loop parameter values under different signal-to-noise ratios is presented.

(20) For infrared image with the characteristics of low contrast and low signal-to-noise, a infrared image enhancement method based on Wavelet Transform and Lateral Inhibition Network is presented.

(21) Second, by means of wavelet multi-resolution analysis, separating modulating signal from radiated noise of naval ships has been simulated and realized with moderate and low signal-to-noise rate.

(22) The stopping time is chosen by minimal mean square error, signal-to-noise ratio and minimal correlation coefficient based on the information of the original (ideal) images and noises.

(23) It utilizes spectral envelope estimation to obtain envelope and peak signal and calculates signal-to-noise ratio of speech harmonics in iterate form under least square estimate criterion.

(24) In the receiving system, the narrow-band interference filter is introduced in order to reduce the background light, increase the signal transmission rate, and improve the signal-to-noise ratio.

(25) Yang argued for a "quantitative evaluation of GNSS interoperability, " noting that common maximum/minimum received power levels can improve the signal-to-noise environment for multisystem receivers.

(26) Compared with DC coupling signal processing, it need lower requirement of signal processing circuit and have the merit of high signal-to-noise performance although it require the device of modem.

(27) Traditional short-term autocorrelation-based adaptive line spectrum enhancer (SABALSE) becomes low in suppressing Gaussian noise when input signal-to-noise ratio becomes low.

(28) Experimental results show that the algorithm can achieve higher peak signal-to-noise ratio (PSNR) and better video quality compared with other existing algorithms.

(29) The filter technique based on Walsh transform is used to suppress seismic noise in order to improve the signal-to-noise ratio of seismic data.

(30) Some of the downward first motion records from the nuclear explosions is probably that of th second half-cycle of the initial wave owing to lower signal-to-noise ratio.

(31) To improve beamforming under low signal-to-noise ratio, a method based on stochastic resonance(SR)in a bistable model is investigated by using a frequency scale transformation method.

(32) For the processing of seismic data with low signal-to-noise ratio, it is important to eliminate the coherent and random noises.

(33) The relationship between the probability of error, the signal-to-noise ratio of detector and the resolution of amplitude was deduced.

(34) In communication of deep space[], the receiving of low signal-to-noise and multi-address communication can be realized with pseudo-random code signal.

(35) An effect of the transfer noise in the CCD on the output signal-to-noise ratio of the cor-relator is analyzed theoretically.

(36) In the space solar telescope(SST), the image integration method is used to increase signal-to-noise ratio(SNR)of the solar magnetic field images.

(37) Experimental results show that the method outperforms on both visual quality and peak signal-to-noise ratio (PSNR), and can be effective to stop error propagation.

(38) The number of bits on each subchannel depends on the Signal-to-Noise Ratio of the subchannel .

(39) The measure module has bigger Signal-to-Noise Ratio because adopting instrumentation amplifier, Programmable gain amplifier and accumulate measurement.

(40) As for the choice of the microwave irradiation frequency, the trade-off must be made in order to insure the penetration depth of the microwave signal, imaging contrast and signal-to-noise ratio.

(41) What is the channel capacity for a teleprinter channel with a 300-Hz bandwidth and a signal-to-noise ratio of 3 dB, where the noise is white thermal noise?

(42) It deeply analyzes composition of noise and its effected factor, and introduces how to measure the signal-to-noise ratio, total harmonic distortion and effective number bits of the ADC.

(43) Computer simulation results show that the signal-to-noise ratio can be enhanced considerably The problem of strong ocean wave interference is solved.

(44) In deep space communications, one of the problems is how to transmit message credibly in low signal-to-noise ratio(SNR)channel environment.

(45) The optical modulation characteristics, differential gain (DG), differential phase (DP) and signal-to-noise ratio (S/N) are described as well in this paper.

(46) The device can effectively improve photoelectric conversion gain of devices, limit the dark current of devices, and reduce the noise of devices, so as to obtain higher signal-to-noise.

(47) Experimental results show the correct vectors of camera are reserved while dithers are eliminated, the peak signal-to-noise ratio of smoothed video is higher than that of the original video.

(48) The advantage of this method lies in the reduction of data redundancy, and image quality and signal-to-noise ratio are improved.

(49) The loess plateau seismic survey is a difficult problem in the world, because too many disturbance factors of the loess overlay area result in too low signal-to-noise ratio.

(50) The Forward Passage Gain (FPG) is an important factor that affects the detection Signal-to-noise Ratio (SNR) and dead band nonlinearity of Fiber Optic Gyroscope (FOG).

(51) A sample-and-hold amplifier (SHA) was used to improve the signal-to-noise and distortion ratio (SNDR) performance and the linearity of ADC.