The Vast user of apple iPhone never gone inside more than first 50 applications in the iTunes store as reported by Surikate. There are 52.2 million on an average visits to Apple Store on every week and no more searching or finding becomes more important to user and so no more important for mobile app … Read more
How MU-MIMO Framework in LTE MU-MIMO is widely considered a key technology for system capacity improvement in modern wireless networks. In contrast to SU-MIMO, where the spatial multiplexing gain is confined to a single user, MU-MIMO allows multiple users to be co-scheduled on the same time-frequency resources to exploit this gain among two or more … Read more
MIMO Feedback in LTE Rel 8 CSI feedback allows downlink transmission to be adaptively optimized based on the instantaneous DL channel, so that closed loop beamforming and adaptive link adaptation can be enabled to optimize the system performance. The DL reference signal used for CSI measurement is different in Rel-8 and Rel-10. In Rel-8, CSI … Read more
How SU-MIMO Framework in LTE Rel 8 SU-MIMO is one of the key technologies in LTE Rel 8. There are two major operations under SU-MIMO: transmit diversity and spatial multiplexing. Transmit diversity is an efficient way to improve the reliability of a system. Accordingly, it is used in LTE Rel-8 for control channel and data … Read more
The Mobile Equipment and SIM are the only parts of the GSM network which the subscriber will really see. Let’s see what inside it. GSM Mobile Equipment There are three main types of ME, these are listed below: Vehicle Mounted These devices are mounted in a vehicle and the antenna is physically mounted on the … Read more
Repeater units are designed to receive signals from a donor site, amplify and rebroadcast the donor sites signals into poor coverage areas or to extend the coverage range of the donor site. Repeater : These repeaters are bi-directional and do not translate frequency and subsequently are limited in output power and gain. Repeaters provide between … Read more
Frequency Planning is possible by manually or automatic.At initial stage of new RF Network automatic frequency planned and then after for optimization based on KPI manual frequency planing done. Manual Frequency Planing Steps The steps to be followed in manual frequency planning are: Calculating the frequency reuse distance theoretically. Determining the cell repeat pattern Planning … Read more
What are Interference and its source, effect and types in GSM Interference is the sum of all signal contributions that are neither noise not the wanted signal. Lets understand how its effect, its type and what possible source for it. Effects of Interference Interference is a major limiting factor in the performance of cellular systems. … Read more
How and What Spatial Diversity Antenna Systems in GSM The spatial diversity antenna system is constructed by physically separating two receiving base station antennas. Here I write on spatial diversity antenna system criteria, configuration. SPATIAL DIVERSITY ANTENNA SYSTEMS Once they are separated far enough, both antennas receive independent fading signals. As a result, the signals … Read more
Basically Diversity Antenna required because of Signal Rich at mobile or BTS by reflection and this change value of its level and quality either good or bed. Let’s understand in detail. NEED OF DIVERSITY In a typical cellular radio environment, the communication between the cell site and mobile is not by a direct radio path … Read more