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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.
This 12-page catalog covers Narda’s broad passive component family, including couplers, power dividers and hybrids, PIN-diode and mechanical switches, attenuators, terminations, and other devices, along with custom components such as high-power dividers, Butler matrices, and power sensors. The catalog also describes the company’s expanding family of fiber optic modulator drivers for lightwave systems operating up to 100 Gb/s, as well as its RF safety products. A detailed section also illustrates Narda’s capabilities in highly-integrated Ultimate MIC and Ultimate SMT multifunction assemblies.
High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) optimize UMTS for packet data services in downlink and uplink, respectively. Together, they are referred to as High Speed Packet Access (HSPA). Within 3GPP release 7 and 8, further improvements to HSPA have been specified in the context of HSPA+ or HSPA evolution. This application note introduces key features of HSPA+ and outlines the changes to the radio interface.
Offering a broad portfolio of RF components organized in convenient, easy-to-scan format. You’ll find a listing of products with complete specs or customization information for components that are designed to fit a wide variety of applications.
This application note describes ATSC Mobile DTV standard A/153, ATSC-M/H. This standard is completely implemented in the R&S®AEM100 ATSC-M/H Emission Multiplexer.
A vector-modulated microwave signal can be generated by mixing an I/Q-modulated signal with a microwave carrier. This Application Note describes the frequency upconversion using a standard passive mixer.
