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  • In-Device Coexistence Interference

    In-Device Coexistence InterferenceMicrowave Journal - Wireless Communications Rohde & Schwarz in the Press In-Device Coexistence Interference Abinash Sinha, Reiner Stuhlfauth and Fernando Schmitt Rohde & Schwarz, Munich, Germany An emerging trend in mobile communications is the parallel usage of multiple radio technologies in mobile devices, tablets and other communications modules. In order to

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  • WLAN Tests According to Standard 802.11a/b/g

    The Application Note summarises all measurements for WLAN test, according to the IEEE Standards 802.11a, b and g. For each measurement, an instrument list, test setups, test method, comments, typical results and implementation hints are included. The enclosed free of charge software provides all IEEE 488 bus sequences ready to run or copy into your own test environment.

  • IEEE 802.11ax Technology Introduction

    This white paper provides an introduction to the technology used in the 802.11ax amendment to the 802.11 standard and an overview of receiver and transmitter test requirements. IEEE 802.11ax, also known as High Efficiency Wireless (HEW), provides mechanisms to more efficiently utilize the unlicensed spectrum bands (2.4 and 5 GHz) and improve user experience.

  • Higher Order MIMO Testing with the R&S®SMW200A Vector Signal Generator

    Due to its outstanding performance the R&S®SMW200A vector signal generator is ideal for testing MIMO receivers in a vast variety of applications offering maximum usability at minimum form factor. It can generate up to eight antenna signals simultaneously in its digital baseband – all standard-compliant and with antenna-specific coding. In addition, it can simulate the complete MIMO transmission channel with up to 32 fading channels, sufficient to emulate higher-order MIMO configurations such as 3x3, 4x4, and 8x4.This application note explains how to use the SMW for testing higher order MIMO systems by presenting different key applications.

  • WLAN IEEE 802.11ac – Wideband Signal Testing

    Offering bandwidths up to 160 MHz, the signal generators and analyzers from Rohde & Schwarz are ideal for testing IEEE 802.11ac signals

  • Wideband mm-Wave Signal Generation and Analysis

    Generation of wideband digital modulated signals in V-band and above is a challenging task and typically requires a set of multiple instruments. This application note aims at simplifying the task and looks into the analysis part as well. Latest signal and spectrum analyzers like the R&S®FSW67 are first to allow use in V-band up to 67 GHz without external frequency conversion. Up to 2 GHz of modulation bandwidth can be covered using the option R&S®FSW-B2000.Former application note 1MA217 describes V-band signal generation and analysis up to 500 MHz modulation bandwidth. This application note expands modulation bandwidth to 2 GHz but also an alternative setup is used to cover the necessary bandwidth and to obtain enhanced purity in signal generation.

  • dB Calculator

    30 dBm + 30 dBm = 60 dBm? It is well known that it is not as easy as that.This application note supplies a free of charge software tool that can be used to add or subtract an arbitrary number of powers. In addition, the software can be used to convert power and voltage units from the linear to the logarithmic scale (and vice versa), convert linear power and voltage ratios to decibels, and convert a VSWR to other reflection quantities.

  • Introduction to MIMO

    Modern radio communication systems have to provide higher and higher data rates. As conventional methods like using more bandwidth or higher order modulation types are limited, new methods of using the transmission channel have to be used. Multiple antenna systems (Multiple Input, Multiple Output – MIMO) gives a significant enhancement to data rate and channel capacity. This application note gives an introduction to basic MIMO concepts and terminology and explains how MIMO is implemented in different radio communications standards.

  • 802.11ad – WLAN at 60 GHz

    Data rates in the range of several Gigabit/s are needed to transmit signals like uncompressed video signals. Amendment 802.11ad to the WLAN standard defines the MAC and PHY layers for very high throughput (VHT) in the 60 GHz range. The specification 802.11-2016 has defined additional modulation and codings schemes for the 11ad single carrier part to increase the data rate. The OFDM part is obsolete.This white paper provides an introduction to the technology behind 802.11ad and highlights the test and measurement requirements.

  • WLAN Traffic Offload in LTE

    This whitepaper provides an overview of the WLAN offload in LTE as standardized by 3GPP, as well as the enhancements for Wi-Fi standardized by IEEE and the Wi-Fi Alliance. It also describes access methods in the joint network, treats the security, and describes IP mobility. In addition network discovery and selection are explained.

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