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The Rohde & Schwarz documents & articles offer a variety of information material.

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  • In-Device Coexistence Interference

    In-Device Coexistence InterferenceMicrowave Journal - Wireless Communications Rohde & Schwarz in the

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  • 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 The OFDM part is obsolete.This white paper provides an introduction to the technology behind 802.11ad and highlights the test and measurement requirements.

  • 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.

  • Measurement of phase-, timing- and gain offset between 2 signals using multiple spectrum analyzers

    This application note describes how to measure the coherence (phase-, timing and gain-differences) between two RFSignals using Rohde&Schwarz spectrum analyzers, a Rohde&Schwarz signal generator and the R&S FS-Z10 Coherence Unit.

  • 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.

  • Generating WLAN IEEE 802.11ax Signals

    Rohde & Schwarz signal generators can generate standard-compliant WLAN IEEE 802.11ax signals for high efficiency (HE) receiver testing.This application note helps to choose the right generator test solutions and explains step-by-step how to generate 802.11ax SISO and MIMO signals. Measurements, such as EVM, are presented to illustrate the signal performance. Furthermore, this document shows how to test 802.11ax receiver specifications and the newly introduced HE trigger-based PPDU specifications according to the IEEE P802.11ax/D1.3 specification draft.

  • 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.

  • 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

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