By Ram Asokan, Ixia SC-FDMA is a new technology used for uplink in LTE. This article explores this technology, its use in LTE and its extension from OFDM.
Developing the LTE uplink, especially the receiver for the base station, requires complex design approaches and a significant capability in test systems. By Tim Fowler, Cambridge Consultants Ltd. click to enlarge Figure 1. Functional test equipment.
There is great potential for ‘greater femtocells' to improve mobile coverage and capacity outside the home environment. By Rupert Baines, picoChip, Inc. Femtocells are now a commercial reality. Launches by AT&T and Vodafone, amongst others, have brought femtocells into the consumer sphere.
By Josh Carnes, National Semiconductor Corporation click to enlarge Figure 1. Block diagram of an IF sampling subsystem within a communications receiver. Cutting-edge 16-bit, high-speed analog-to-digital converters (ADC) can offer the very high dynamic range and low distortion levels required to meet today's most demanding wireless communications standards.
IPSec's growing importance in ensuring security and reliability in new networks By Asaf Shen, Discretix Inc. Internet Protocol Security (IPSec) provides security at the network layer of the protocol stack. By using IPSec, protection is offered to all IP packets regardless of the protocols and applications running in the upper layers of the protocol stack.
The LTE femtocell stands to serve as a key weapon in the mobile operator arsenal. By Todd Mersch, Continuous Computing click to enlarge Figure 1. Putting the puzzle together, integrated LTE femtocell silicon. The market is buzzing about the critical role of "small cells" in Long Term Evolution (LTE) deployments femtocells, picocells and microcells.
LTE will bring changes to base station design, from both the hardware and software perspective, giving operators challenges as they prepare for technology trials. What do you feel is the greatest challenge today in deploying base stations and how can designers address it? By Frank Ditore, ESL/SystemVue Product Manager, Agilent EEsof EDA Multi-format, multi-band radios are quickly reaching maturity in the commercial wireless infrastructure market.
All indications are that LED backlights will be the preferred light source in mobile applications in 2011, representing a significant growth opportunity for OEMs and the entire backlight and panel supply chain. Do you see the role of LEDs in wireless products changing as the technology matures? By Vandana Lokeshwar, Technical Marketing Manager, Newark Attention is now shifting away from achieving raw light output that matches incandescent bulbs, to increasing the number of lumens per electrical watt supplied.
The (new/old) challenges in accelerating LTE device time-to-market. By Konstantinos Stavropoulos, Anite click to enlarge Figure 1. A representative set of lab acceptance tests that 2G/3G operators have considered. The use of wireless devices, whether handsets or data cards, has increased substantially during the last few years.
By Akshaya Trivedi, Altera Corporation Figure 1. SoC framework and infrastructure. Radio Access Networks (RANs) are undergoing an architecture change to an all-IP flat network to reduce network deployment costs as well as to offer rich mobile applications and services at a lower end-to-end latency.
Leveraging highly integrated RFIC designs and high dynamic range converters helps meet the challenges of next-generation base stations. By Phillip Halford and Ed Balboni, RF Group, Analog Devices, Inc. click to enlarge Figure 1.
By Manuel Uhm and Mark Quartermain, Xilinx The baseband processing function represents a key area of product differentiation for Telecommunications Equipment Manufacturers (TEMs). However, the advent of 3.9/4G systems poses a difficult challenge to TEMs, as they struggle to evolve traditional DSP-centric channel cards to meet a new set of technical and commercial challenges.
For deployments by a single operator, wireless repeater systems offer more cost effective fiber transport costs. By Allan Evans, VP of Marketing, Samplify Systems ABI Research predicts that revenues for distributed antenna systems and in-building wireless systems will exceed $15B by 2013.
The current generation of monitors are portable heart rate sensors that have found their way into general purposes for activities such as exercise and sports. While these devices are useful for individual purposes, they do not facilitate use by a coach or manager. By Archana Yarlagadda, Cypress Semiconductor click to enlarge Figure 1.
Want to learn more about how design engineers are addressing the challenges of Wireless Sensor Networks? Read on! By Nicholas Butler, Wireless Sensor Networks, National Instruments click to enlarge Figure 1. Technology adoption lifecycle from Crossing the Chasm, Geoffrey A.