Abstract: Provided is a chip mounter for recognizing a Ball Grid Array (BGA) package through a chip mounter. The chip mounter includes a BGA package recognition apparatus which includes an image acquisition unit which acquires image information of a BGA package which includes a plurality of solder balls having n patterns (n?1), a pattern recognition unit which analyzes the image information and outputs information about the BGA package, and a storage unit which stores the information about the BGA package, wherein the pattern recognition unit recognizes the n patterns, selects n seeds respectively corresponding to the n patterns and performs a seed growing operation which groups solder balls which are continuously located adjacent to the seed and have the same pattern as the seed into the same group as the seed, with respect to each of the n seeds.

Abstract: Provided are a chip mounter and a method for recognizing a Ball Grid Array (BGA) package through a chip mounter. The chip mounter includes a BGA package recognition apparatus which includes an image acquisition unit which acquires image information of a BGA package which includes a plurality of solder balls having n patterns (n?1), a pattern recognition unit which analyzes the image information and outputs information about the BGA package, and a storage unit which stores the information about the BGA package, wherein the pattern recognition unit recognizes the n patterns, selects n seeds respectively corresponding to the n patterns and performs a seed growing operation which groups solder balls which are continuously located adjacent to the seed and have the same pattern as the seed into the same group as the seed, with respect to each of the n seeds.

Abstract: This invention relates to a method and apparatus for increasing the performance of searcher by using the array antenna when the signal to interference plus noise ratio is low. The two-dimensional searcher performs the spatial-filtering to reduce the noise and interference components and then correlates the spatial-filtered signal with a pseudo noise (PN) code to thereby detect the incoming signals and acquire the corresponding code timings. Furthermore, the two-dimensional searcher can be used to increase the performance of a finger beamformer in two ways. One is to use searcher beamforming weight as initial finger beamforming weight to increase the convergence speed in the adaptive beamforming algorithms. The other is to reduce an amount of computation in the angle of arrival estimation algorithms by calculating the azimuth power spectrum only for the specific angle range.

Abstract: This invention relates to a method and apparatus for increasing the performance of searcher by using the array antenna when the signal to interference plus noise ratio is low. The two-dimensional searcher performs the spatial-filtering to reduce the noise and interference components and then correlates the spatial-filtered signal with a pseudo noise (PN) code to thereby detect the incoming signals and acquire the corresponding code timings. Furthermore, the two-dimensional searcher can be used to increase the performance of a finger beamformer in two ways. One is to use searcher beamforming weight as initial finger beamforming weight to increase the convergence speed in the adaptive beamforming algorithms. The other is to reduce an amount of computation in the angle of arrival estimation algorithms by calculating the azimuth power spectrum only for the specific angle range.