Cellular communication systems have gone through a few generations of development. The latest technology migration was from 2.5G to 3G networks, enabling info-entertainment and other multimedia applications. Beyond 3G, new standards such as high-speed downlink packet access (HSDPA) and cdma2000 1x EV DV standards have been ratified. These 3G+ standards are based on the principal of a shared channel where users are dynamically assigned codes on packet-by-packet bases. This approach to radio resource sharing is optimal for data services that tend to have bursts of data. The 3G+ standards, therefore, lower the cost of delivering data services for the operators. Also, 3G+ standards employ fast rescheduling algorithms that reduce the variance in downlink transmission delay. This enhances the experience with delay-sensitive applications such as interactive games. Beyond 3G+, work has already begun on fourth-generation (4G) technology, with the goal of achieving data rates up to 100 Mbps.
Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal-processing applications and the leading supplier of high-performance amplifiers, today extended its...
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IDT announced the industry’s only off-the-shelf pre-processing switch (PPS) for digital signal processor (DSP) clusters. Optimized for wireless baseband processing applications and utilizing...
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A new high linearity direct conversion I/Q demodulator from Linear Technology significantly reduces the cost of 3G and WiMAX basestation receivers. The LT5575’s extended operating frequency...
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As RF power amplifier designers weigh cost, efficiency, linearity, thermal performance and peak power in transistors, Phoenix, Ariz. based fabless semiconductor start-up HVVi Semiconductors, Inc.,...
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IDT™ unveiled its 10G serial buffer, the industry’s first Serial RapidIO®-based memory solution. When coupled with the previously announced IDT pre-processing switch (PPS), this...
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By Tom Flanagan, Texas Instruments For communications equipment manufacturers, selecting the right technology can make it easier to reach the growing small and medium-sized business (SMB)...
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Maxim has over 120 RF IC and high-speed data-converter products designed specifically for wireless-infrastructure applications. All devices are engineered to deliver the highest dynamic range, the...
[from Maxim] >>
Atmel successfully designs, manufactures and markets high-performance standard RF blocks since several years. These devices target infrastructure applications for any broadband digital...
[from Atmel] >>
Today’s networking infrastructure systems are characterized by separate voice, fax, and data subsystems over independent real-time voice (circuit switched) and data (packet) networks. The...
[from Freescale] >>
Throughout the development of wireless cellular systems Xilinx FPGAs have played an instrumental part, moving from a support-chip role in the 1G and 2G systems to becoming the baseband signal...
[from Xilinx] >>
Providing end-to-end wireless coverage, virtually every wireless call made today passes through Analog Devices' silicon. Our comprehensive portfolio of signal processing ICs, chipsets, reference...
[from Analog Devices] >>
The number of wireless standards and their potential single-chip combinations raises many questions about the right process technology for implementing next-generation products.
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This paper identifies common fundamental techniques underlying cdmaOneTM, CDMA2000® and WCDMA technologies, as well as their family of standards. Furthermore, this paper demonstrates that these...
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A basic design decision facing an operator of a WCDMA network is the nature and level of synchronization
between base stations in the network. The WCDMA standard allows asynchronous operation in...
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National Semiconductors offers a wide range of high performance signal path solutions for wireless basestation (BTS) and wireless infrastructure applications in 2G, 2.5G, 3G and 4G mobile...
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This application note describes a reference design of multi-channel digital up converters(DUCs) and digital down converters (DDCs) for CDMA2000 and UMTS base stations. The provided DSP algorithms...
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ACPR (adjacent channel power ratio), AltCPR (alternate channel power ratio), and noise are important performance metrics for digital communication systems that use, for example, WCDMA (wideband...
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This document describes how to implement a maximum a posteriori (MAP) decoding algorithm for wireless turbo codes on a TMS320C62x(tm) digital signal processing (DSP) device. The max-log-MAP...
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There has been a tremendous growth in wireless
communication technology over the past decade.
The significant increase in subscribers and traffic, new
bandwidth consuming applications such as...
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RACH detection forms a key part of the WCDMA base-band functionality, and demands significant levels of signal processing, making it ideal for implementation in a Xilinx FPGA that can leverage...
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IDT™ announced achievement of full interoperability between the IDT pre-processing switch (PPS) and the highest performance digital signal processors (DSP) from Texas Instruments (TI)....
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Freescale Semiconductor introduces a development platform designed to speed and simplify creation of networking equipment for 3G Long Term Evolution (LTE) and other emerging broadband wireless...
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Based on Infineon's well proven SMARTi RF transceivers for mobile communication applications, Infineon provide a fully developed, tested and documented THOR RF reference design for customers....
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The Searcher function found with W-CDMA Baseband processing demands significant signal processing, which makes it ideal for implementation in a Xilinx FPGA. The inherent flexibility of the FPGA...
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Suited for 3G basestaion, the IAM-93516 E-pHEMT MMIC mixer operates with RF and LO frequency inputs from 400 to 3,000 MHz and an IF output extending from 70 to 300 MHz. The device provides greater...
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Fast and precise production of current and future wireless devices, all-in-one architecture with integrated vector signal generator and analyzer are the prerequisites for state-of-the-art...
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The LT5528 direct I-Q modulator enables more-compact lower-cost cellular base-station transmitter designs by incorporating a matched pair of double-balanced mixers that form a carrier-suppressed...
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Linear Technology's LTC6103 contains two independent, high side current sense amplifiers with exceptional precision and response time. As a dual, the LTC6103 is ideal for multiple current sensing...
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The LT5557, a new high linearity, 3.3V, downconverting active RF mixer from Linear Technology. It elevates receiver dynamic range performance while extending bandwidth capability to cover 3G and...
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