The APD statistical analysis of the high-speed system electromagnetic noise
This paper mainly discusses the power network offline noise of high-speed railway system, and uses the MATLAB simulation analysis on its amplitude probability distribution. The results show that the characteristics of the noise mentioned in this article is consist with the theoretical model of the high-speed railway system. It can be used to study the effects of such noise on the high-speed system.
On the Relation Between the Amplitude Probability Distribution of Noise and Bit Error Probability
In the paper entitled "Relation Between the Amplitude Probability Distribution of an Interfering Signal and Its Impact on Digital Radio Receivers," a formula for estimating the bit error probability of an interfered digital wireless receiver was presented in terms of the amplitude probability distribution of the noise. This formula is very useful for predicting the impact of interfering signals on digital wireless systems and for defining appropriate limits for the interfering signal level to protect wireless systems. However, the formula must be corrected so that it is valid for modulation schemes, such as quadratic-amplitude modulation and multiple phase-shift keying.
New approach to vision-based BGA package inspection
Ball grid array (BGA) techniques have developed very fast due to the advantages of more I/O ports, small size, and so on. In this paper, a vision-based algorithm for BGA package inspection is proposed to accurately estimate center and diameters of solder-balls of BGA packages, so that defects of BGA packages, such as missing or extra balls, oversize or undersize balls, over-height or under-height balls, and pitch can be detected for ensuring the quality of BGA packages.