In this paper a Rake finger grid structure for direct-sequence code division multiple access (DS-CDMA) systems is analyzed as an alternative to the conventional Rake structure using individual fingers with timingand phasor tracking. The grid uses a group of equispaced Rake fingers in the delay domain. Each of the Rake fingers uses linear minimum mean-squared error (LMMSE) tap weight estimation ...

introduction : pregnancy as a stressful event may cause some consequence for both mother and infant such as low birth weight (lbw). lbw is seen in about 7% of pregnancies in iran. it was proved there is a correlation between infants weight and maternal social support. this study was designed to evaluate maternal perceived social support in lbw infants and infants with normal weight. methods and...