Antenna Tilt : Mechanical vs Electrical
For RF optimization and Design purposes, engineers/SON algorithms generally recommend tilt changes (not getting into optimization details in this blog),...
Category: RF Basics
Signal to Interference and Noise Ratio (SINR)
SNIR is a measure of Signal Quantity and Interference and Noise Quantity and it is very important measurement in terms...
Hybrid Automatic Repeat Request (HARQ) in LTE FDD
HARQ stands for Hybrid Automatic Repeat Request. HARQ = ARQ + FEC (Forward Error Correction)/Soft Combining. ARQ refers to Automatic Repeat Request...
5G mmWave 28 GHz Band Link Budget – n257
The combination of 5G NR technology and millimeter wave bands pioneer a new level of mobile performance with ultra-high speeds...
5G NR Antenna Port – Logical and Physical Antenna Mapping
Downlink multi-antenna transmission is a key technology of 5G NR. Signals transmitted from different antennas ports will experience different “radio...
5G NR Transmitted Signal Quality : Frequency Error [Fe]
Transmitted signal quality specify how much the transmitted signal deviated from an ideal signal in terms of frequency domain, timer...
5G NR Base Station Types
Introduction to 3GPP Base Station As per 3GPP specification TS 38.104, the NR Base Station can be classified in following...
What is directivity in a coupler ?
Directional couplers are four-port circuits where a defined amount of the electromagnetic power fed at the input port in a...
What is the difference between co-located BTS and co-existed BTS and explain the required 3GPP compliance
Co-existence with other systems The manufacturer shall declare whether the BS under test is intended to operate in geographic areas...
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...