When talk about Practical RF Planning then its also needs to take care about losses and physical losses like Cable,Connector and Combiner at BTS is more important. Cable Loss Two types of cables are used, main cable and jumper cable. Cable losses are given in per 100feet. Jumper cable has more loss than main cable. … Read more
Gain is most important thing in wireless communication and if its passive then it will be very useful here I write about antenna gain and diversity gain definition and its effect. Antenna Gains Mobile Station Antenna Portable mobile phones antennas have typically gain of 0 to 1 dBd. Car mounted antenna has a typical gain … Read more
When we talk about GSM Rf planning then first thing into mind is Link Budget,here i write about why link Budget analysis in GSM Link budget analysis provides: Coverage design thresholds EIRP needed to balance the path Maximum allowable path loss It is important that the uplink and downlink paths be balanced, otherwise not enough … Read more
What is FADING, Its Type and Effect in RF design What is Fading: – Fading is most important thing when you design any RF Design lets understand what is fading and how its effect. The communication between the base station and mobile station in mobile systems is mostly non-LOS. The LOS path between the transmitter … Read more
Definition and Effect of Reflection, Diffraction, Scattering and Multipath Propagation in RF Engineering Reflection Diffraction and Scattering in wireless communication When any new site has been planned then it should be such a way the effect of Reflection, Diffraction, Scattering and Multipath should be Balance. Reflection in wireless communication Reflections Occurs when a wave impinges upon … Read more
The development of the simulator that will be implemented can be classified in two phases. The first phase is the development of a simulator, capable for the investigation of the typical handover procedure. The second phase will include the implementation of the LAH algorithm that will consider the location of the user. Simulations that will … Read more
Taking into account the algorithm LAH we have designed a LAH logical diagram, based on a general cellular handover architecture. The flowchart in Figure below is a general description of the procedures that have to be taken into account for combining the location information with the handover measurements to avoid the undesirable effects of current … Read more
Location-Aided Handover (LAH) Algorithm is actually a set of algorithms, which aims to solve the current handover procedure problems. The set of algorithms include current handover algorithm, fuzzy handover, handover algorithm based on the use of adaptive antennas, handover prioritization algorithm, etc. LAH is based on the CELLO Architecture, which is shown below: This figure clearly shows … Read more
Handover is the mechanism that transfers an ongoing call from one cell to another as a user moves through the coverage area of a cellular system. The number of cell boundary crossings increases because smaller cells are deployed in order to meet the demands for increased capacity. If we minimize the expected number of handovers … Read more
ERP,EIRP,dB and dBm calculation are Most important thing to take care in RF Planning of any site. Isotropic RF Source A point source that radiates RF energy uniformly in all directions (I.e.: in the shape of a sphere) Theoretical only: does not physically exist. Has a power gain of unity I.e. 0dBi. Effective Radiated Power … Read more