The simulated experiments of woisy images using ICA algorithms aften wiener de-noising are implemented and the PSNR(Peak Signal to Noise Ratio)is used to provide quantitative evaluations of the feasibility and efficiency of the method.

应用上述算法,对有噪图像信号进行仿真实验研究,通过比较降噪前后的峰值信噪比(Peak Signal to Noise Ratio,PSNR),说明该算法的可行性和有效性.

The experimental results showed that the average gain in Peak Signal to Noise Ratio was above 0.12dB and the average reduction in bit-rate was above 1.77%, so the proposed mode is an effective prediction mode for improvement of coding performance.

This article introduced the ROI technology coding algorithm thought,realized the choice of value S of MAXSHIFT method,proposed the method of ROI mask that backtracking,finally after introduced ROI through the experiment the image compression to carry on the comparison,compared the coding of the image with two ROIs through the experiment finally,has obtained the good compression ratio and the peak value noise ratio.

Simulation results show that this method can achieve about 6dB signal to interference plus noise ratio (SINR) gain when the interference bandwidth is as wide as two OFDM subcarriers and the system SIR is as strong as 0dB. As the bandwidth of NBI decreases, more SINR gain will be obtained.

The effect of mutual coupling on the performance of the signal to interference plus noise ratio (SINR) and the transient response is illustrated with the example of the planar array constituted by dipoles. It is shown that the mutual coupling betwteen the elements degrades the SINR and reduces the speed of response of the arrays with certain inter element spacing.

Based on CDMA codes and their spatial information, the WLS multiuser detection algorithm combined the array pattern is provided. The calculation formulas for interference plus noise ratio(SINR) and bit error rate(BER) have been derived.

Simulation results show that about a 1 to 1.5 dB gain in terms of SNR (signal to noise ratio) can be achieved over frequency-selective fading channels compared to conventional LDPC coded OFDM systems without ordering, and the proposed scheme is robust to CSI quantization.

Fast identification of digital amplitude modulation level at low signal-to-noise ratio

Simulation results reveal that the AR scheme with its decision algorithm outperforms the conventional and other modified TR schemes in generalized signal-to-noise ratio (SNR).

The SNR (signal-to-noise ratio) of the vibration signals of a diesel cylinder lid is the highest.

Identification of Discrete Linear Objects with a Large Signal-to-Noise Ratio

Methods for the conversion of image silver nanoparticles into luminescent products were developed; this considerably increased the signal-to-noise ratio of luminescence reading.

The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors...

The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors are discussed.The conclusion is us follows: For small snr, the output snr is proportional to the products of two input snr; if the input snr of one channel is much lorger than the other and than 1, the output snr will be proportional to the smaller input snr; for all conditions (either strong signal, or weak signal) . the output snr of correlation detectors is comparable to the squar law detector's.

In this paper the information transmitting rate of delta-modulation (△M) system is discussed and compared with PCM system. It points out that the principal way of increasing the information rate is to decorrelate the modulating signal. The formulae of computing the signal-to-noise ratio of single integration and double integration delta-modulation systems are given. The signal-to-noise ratios and thier relations to pulse repetition frequency for both systems are calculated with typical modulating...

In this paper the information transmitting rate of delta-modulation (△M) system is discussed and compared with PCM system. It points out that the principal way of increasing the information rate is to decorrelate the modulating signal. The formulae of computing the signal-to-noise ratio of single integration and double integration delta-modulation systems are given. The signal-to-noise ratios and thier relations to pulse repetition frequency for both systems are calculated with typical modulating signal and the results are compared with PCM system. The views in the problem of compression-expansion with practical meaning for both PCM and △M systems are presented. The △M system is reviewed from the point of view of information theory.

Some supplementations, unifications, and simplifications of the problem of optimum band-width of a filter approximately matched to high-frequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular high-frequency pulse, the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular high-frequency signal was discussed and the formula for calculating the optimum band-width of the system was obtained.For the case of pulse...

Some supplementations, unifications, and simplifications of the problem of optimum band-width of a filter approximately matched to high-frequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular high-frequency pulse, the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular high-frequency signal was discussed and the formula for calculating the optimum band-width of the system was obtained.For the case of pulse trains with uniform amplitudes, simplification and unification of some results of the other authors were made, it was pointed out that there exists a simple relation between the optimum value of attenuation of the delayed feedback system with unlimited band-width and the optimum teeth-width of a comb filter with single-tuned characteristic of the teeth. The comparison between these two systems was made by the use of the data of the other authors.For the case of rectangular pulse trains with non-uniform amplitudes, the accumulation of the rectangular pulse trains with trapezoidal envelope by the delayed feedback system with finite bandwidth was discussed, and formula of the signal to noise ratio at the output terminals was obtained. For finding the optimum bandwidth of the delayed feedback system, some numerical calculations were made, and curves of the signal to noise ratio with respect to the band-width were plotted. From these curves we found that in this case there exists an optimum band-width of the system, the value of which is wider then the optimum band-width of the system in the case of accumulation of rectangular pulse trains with uniform amplitudes.