The TDMA/FDMA multiplexing is used in GSM, the information needed in the synchronization between MS and BTS is provided by FCCH+SCH. The MS determines the frequency of the BCCH carrier by searching for the frequency correction Burst transmitted via FCCH; then it finds the SCH (synchronization channel) according to the relationship between SCH and FCCH … Read more
Paging Indicator Channel PICH main work in 3G as below. Carrying Paging Indicators (PI) Fixed rate (30kbps), SF = 256 N paging indicators {PI0, …, PIN-1} in each PICH frame, N=18, 36, 72, or 144 The Page Indicator Channel (PICH) is a fixed rate (30kbps, SF=256) physical channel used by the NodeB to inform a … Read more
Here I write about antenna pattern, Front-to-rear Ratio and Upper Side Lobe Suppression in antenna. Antenna Pattern The pattern is the electromagnetic field of antenna radiation distributed by coordinate along fixed distance. If the pattern is represented by radiation field strength, it is called field strength pattern. If the pattern is represented by power density, … Read more