Group delay measurement on devices with an embedded LO using the R&S ZVA vector network analyzer

This video demonstrates group delay and relative phase measurements on frequency converting devices where access to the LO is limited. The measurements are made using the R&S ZVA vector network analyzer equipped with the R&S ZVA-K9 embedded LO mixer delay measurements option from Rohde & Schwarz. Based on a unique and novel two-tone method, mixers…

Iterative Direct DPD

Digital pre-distortion (DPD) is a common method to linearize the output signal of a power amplifier (PA) operating in its non-linear operating range. This white paper describes an approach to generate a pre-distorted signal based on a hard-clipper. The resulting waveform pushes the output of the DUT as close to the hard-clipper as possible. Due…

LTE – Advanced (3GPP Rel.12) Technology Introduction

This white paper summarizes significant additional technology components based on LTE, which are included in 3GPP Release 12 specifications. The LTE technology as specified within 3GPP Release was first commercially deployed by end 2009. Since then the number of commercial networks is strongly increasing around the globe. LTE has become the fastest developing mobile system…