Category: 4G LTE

Absence of synchronization is one of the main sources of interference between TDD based systems belonging to different carriers. The figure below provides a quick view of what will happen…

Here I write on simple how guard band requirement for LTE for 2 option. Guard band requirement LTE verses GSM and guard band requirement LTE FDD verse LTE TDD Guard…

It is difficult to separate Adjacent Channel Leakage power Ratio and Adjacent channel selectivity because they coexist. therefore, Adjacent Channel Leakage power Ratio and Adjacent channel selectivity are usually considered…

Adjacent channel selectivity Adjacent channel selectivity (ACS) is a protection index to determine the capability of a receive filter. Adjacent channel selectivity refers to the capability to receive the power…

Here I write down one basic idea of Spectrum reframing in LTE and why operators require spectrum reframing for LTE. Operators worldwide are looking forward to new LTE technologies deployment…

Assume that the eNodeB receiver’s IF bandwidth is Bw (unit: MHz), and the eNodeB receive noise figure is Nf (unit: dB), The equivalent noise level of the eNodeB receiver is…

Here I write about a simulation analysis of the system performance deterioration caused by the following four types of interference: eNodeB->UE, UE->eNodeB, eNodeB->eNodeB, and UE->UE when two systems are not…

A commonly accepted definition of capacity is the one provided by Shannon which states that capacity is the maximum achievable set of rates in multiple access channels with an arbitrarily…

Here I write down on How Time Slot Allocation for Uplink and Downlink LTE and How Cyclical Prefix Allocation for LTE Time Slot Allocation for Uplink and Downlink – TDD…

UE Capability It is important to remember that the composition and penetration of various UE types will also have an impact on the final achievable cell throughput level. A high…