Image data compression using DCT (Discrete Cosine Transform) and interpolation And allied topics in digital image processing applied to satellite imaging.

Digital image processing plays an important role in modern scientific endeavors. It has specific uses in satellite imaging, remote sensing, telemetry and medical imaging. Image processing requires huge memory space to store the data, and to process the data in real time high speed computers are required

A CPW-Fed Quasi-PIFA Antenna Using Quasi-Lumped Resonators for Mobile Phones

A novel single CPW-fed Quasi-Planar Inverted-F Antenna (PIFA) using quasi-lumped elements is developed for mobile communication handheld terminals operating at 2.6GHz.The antenna is composed of an inductor covered by a set of interdigital and parasitic capacitors.The proposed antenna achieves a measured bandwidth of 11% for return loss with the antenna gain of about 4 dBi.The antenna is designed in single layer (zero height) which is appropriate to be used in thin devices where a small room is considered for the antenna.The proposed antenna is suitable for use in Long Term Evolution band 7.The operating frequency of introduced antenna depends on the number of interdigital fingers and inductor length rather than the total resonator patch only, so that the operating frequency can be altered while the total patch size remains unchanged. The calculated operating frequency is confirmed by simulation and measurement. Also the dipole-like simulated radiation pattern is confirmed by measurement