The CDMA receiver system in an IS-98-A standard
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2000-07-01 |
| Reciprocal mixing, cross-modulation, spurious response and other RF issues should be considered carefully in the design of a CDMA receiver. The paper offers a derivation of essential specifications, block- and front-end level, for the receiver section of a CDMA handset |
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| SAW filters in CDMA mobile communication networks
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1999-09-09 |
| Surface Acoustic Wave (SAW) filters are used in the intermediate frequency (IF) filtering stage for both the Code Division Multiple Access (CDMA) handset and infrastructure. They are preferred over other types of filter technologies because SAW filters demonstrate high performance yet low cost and small size. This paper describes the evolution of SAW designs to meet the challenging demands of reducing the size and cost for CDMA IF filters |
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| Programmable modem for w-cdma
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2002-04-08 |
| This article describes standards of the W-CDMA programmable modem and its potential to evolve to multimedia capabilities for the masses |
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| Designing Local Oscillators For CDMA Mobile Handsets
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2001-04-02 |
| This paper discusses the issues that affect local oscillator design for CDMA. Particularly, the performance, standards requirements and design approaches are explored using a PLL synthesizer |
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| Self-synchronizing a CDMA cellular network
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1999-09-09 |
| This paper describes the concept of utilizing the normal messaging of mobile stations operating in an IS-95 CDMA network to transfer time between various BTSs (Base Station Transceivers). IS-95 is a time-synchronous system in that all BTSs operate from a common time reference, which is specified to be the same as the time scale used by the Global Positioning System (GPS). This design choice provides the CDMA network with several advantages over an asynchronous design, but does require some means to distribute time throughout the network |
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| Designing low-cost CDMA front-end receivers
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2003-07-01 |
| The constant pressure on RF design engineers to come up with low-cost RF solutions are remedied by RF Micro Devices' RF2870 small CDMA LNA/Mixer |
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| Suppressing errors in W-CDMA mobile devices
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2002-01-01 |
| This technical article describes the advantages of the W-CDMA specification that is capable of offering wireless Internet access with voice and data capabilities for handset designs |
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| Evaluating data transfer in HSDPA/W-CDMA nets
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2007-10-01 |
| Testing mobile phones under real HSDPA/W-CDMA network conditions poses several challenges. A network simulator can serve as a platform for comparing the throughput of different user equipment by providing a stable and reproducible network environment |
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| Power management in CDMA systems
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2001-04-15 |
| Through the use of system-level design techniques, wireless systems developers can more efficiently design, optimize, and test power control algorithms in IS-95A CDMA handset and base station products |
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| Technical challenges and solutions for narrow-band (IS-95) CDMA
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1999-04-08 |
| CDMA is the fastest growing wireless technology and is projected to be the leading technology worldwide in a few years. This paper presents a complete radio chipset for narrow-band CDMA (IS-95) and discusses the technical problems associated with IS-95. CDMA chipset system performance is presented based on simulation and measurements |
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| Advanced W-CDMA channel card implementation with PLD
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2001-08-09 |
| This conference technical paper discusses the functions and use of the W-CDMA channel card implementation with PLD |
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| Oscilloscopes for CDMA RF wireless signal analysis
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2003-02-03 |
| Analysis and capture of the full band of ultra high-frequency RF signals with oscilloscopes is now possible due to the rapid performance advancements in real time oscilloscope technology. |
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| The impact of interference on CDMA receiver
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2002-12-02 |
| This article discusses more accurate tests that can be done to ensure mobile phones will respond throughout a wide, dynamic range. |
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| Testing W-CDMA user equipment with RMC
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2004-10-01 |
| Reference measurement channel provides a means to analyze areas of receiver performance in the RF domain. |
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| STMicroelectronics, Dot Wireless to collaborate on solutions for 3G mobile phones
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1999-10-15 |
| STMicroelectronics and Dot Wireless Inc. have announced an alliance to co-develop integrated CDMA baseband chips and related technology for third-generation (3G) mobile phones |
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| SAW filters for wireless communications
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1999-09-09 |
| This paper describes the recent development in wireless industry and a variety of SAW filter technologies used in wireless communication systems, such and TDMA, GSM, and CDMA with focus on IF filtering. IF SAW filters developed for future third generation (3G) wireless communication systems, such as WCDMA and CDMA2000, are also introduced in this paper |
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| Using RF power detector in mobile stations
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2004-10-01 |
| Linear-in-dB RF detectors deliver better performance in amplifier applications for IS-95, W-CDMA, cdma2000 and TD-SCDMA air interfaces |
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| Advanced test ensures system longevity
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2003-10-16 |
| Leveraging the hooks built into the W-CDMA requires a full understanding of how they work and the trade-offs involved in their use |
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| Shenzhen home to kindred entrepreneurial spirits
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2001-04-01 |
| Ling Shi and Dong Tao are kindred examples of a new spirit of entrepreneurialism taking root in Shenzhen, the Chinese boomtown just across the border from Hong Kong. |
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| Digital control fits power amps for 3G
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2001-04-15 |
| Delivering new consumer products based on 3G wireless communication standards will require an overhaul of the existing infrastructure, including the network's base transceiver station (BTS) infrastructure. |
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| Computers of the next millennium: Unplugged
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1999-12-22 |
| My daughter is fairly computer literate and does not give much thought to the Y2K problem or the possibility of computers/software failing at the end of the millennium. But my wife lives in terror, fearing that planes will fall out of the sky, power utilities will fail (not mention computer banking systems), and even the |
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| Understand 3G LTE testing challenges
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2008-04-16 |
| With over 2.5 billion users and growing, the GSM/3GSM radio access technology dominates today?s global cellular landscape. To keep pace with this growth and the demand for faster, more bandwidth-intensive services, it is essential that the technological infrastructure continue to evolve while remaining efficient, competitive and successful. |
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| Improve system performance with differential signal chains
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2010-02-15 |
| This article discusses the performance and merits of differential signal chains in the context of 3G and 4G wireless applications. |
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| Unraveling Sony Vita
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2012-01-03 |
| In the significant sockets of Sony's Playstation Vita, you can find IBM, Toshiba, Qualcomm and Avago. |
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| Hints on wireless USB via UWB tests
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2008-06-02 |
| The unique ability of UWB signaling to operate at the noise floor enables UWB devices to peacefully co-exist and share spectrum with traditional wireless services. |
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| Accurate power measurement in communications systems
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2008-05-01 |
| This article presents a brief history of power measurements in communication systems, important considerations in making accurate power measurements for modern communication systems, and how the latest advancements in today?s power meters help you achieve your power measurement tasks effectively. |
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| Reducing the cost of cellphone testing
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2006-09-16 |
| As phones increase in complexity, requiring more tests, manufacturers must find strategies that will keep rising test costs down. |
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| Peek inside iPhone 4S
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2011-10-25 |
| Here's an image gallery of what can be found inside the iPhone 4s. |
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| Yukyung marshals army of IC vendors for Viliv tablet
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2011-03-28 |
| "Globally" designed and based on Windows, Yukyung Technologies' Viliv X70 EX 3G is a good example of a tablet that preceded the iPad. |
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| Incorporating M2M into smartphones
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2011-12-01 |
| Read about leveraging the latest smartphone technology into a commodity M2M engine. |
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