What parameters impact the EVM of transmitter chain ?

The error vector magnitude or EVM is a measure used to quantify the performance of a digital radio transmitter or receiver. A signal sent by an ideal transmitter or received by a receiver would have all constellation […]

Robust Header Compression – ROHC

ROHC is a header compression protocol/algorithm that can be used compress the header of different IP packets. In normal case without compression  IPv4 header is 40 bytes and IPv6 header […]

TTI Bundling for better HARQ and Latency

TTI bundling enables a data block to be transmitted in consecutive TTIs, which are packed together and treated as the same resource during the scheduling process. TTI bundling makes use […]

How to get better ACLR in TX chain ?

If you are trying to debug the bad ACLR in TX Chain or you are designing a TX for your system, then you must take care following points with regards […]

LTE Cell Camping and Selection Procedure

Cell Selection and Re-selection: After selecting a PLMN, a UE selects a cell in the PLMN to camp on. After camping on the cell, the UE monitors system information, performs […]

PLMN Selection in LTE (Idle Mode Action)

UEs can be either in RRC_CONNECTED or RRC_IDLE mode. UEs will be declared as RRC_IDLE if there is no RRC connection between the UEs and the eNodeB and RRC_Connected when […]

NR Resource Block Definition and RBs Calculation

Resource Block Definition One NR Resource Block (RB) contains 14 symbols in time domain and 12 sub-carriers in frequency domain similar to LTE. In LTE resource block bandwidth is fixed […]

5G NR Signaling Radio Bearers (SRBs)

SRB stands for Signaling Radio Bearer.”Signalling Radio Bearers” (SRBs) are defined as Radio Bearers (RBs) that are used only for the transmission of RRC and NAS messages. As per 3GPP […]