Standardizing smart antenna API for SDR networks
Sep 1, 2007
By Seungheon Hyun, June Kim, Seungwon Choi, Lee Pucker, and Bruce Fette In addition to defining the smart antenna application programming interface (API), this article will also describe the smart antenna API in detail and explore its benefits. Plus, it will introduce the smart antenna working group and the process they are following in developing this API, as well discuss steps toward standardization....
Tackling complex signal-processing tasks for 3G LTE
May 1, 2007
By Ashok Bindra While semiconductor
suppliers are readying their DSPs and FPGAs, as well as front-end data
converters and RF power amplifiers, test gear providers are unveiling their
test strategies. ...
Converter performance approaches software-defined radio requirements
Apr 1, 2007
By Brad Brannon While most of the technical bottlenecks to realizing true software-defined radio can be found in the linear and mixed-signal processing components, recent trends in ADCs and DACs have moved their levels of performance one step closer to achieving that goal....
Adopting multi-antenna signal processing in wireless networks
Mar 1, 2007
By Steven Glapa Wireless operators are increasing their focus on data and multimedia services to drive revenue growth. This is creating demands for substantially improved radio equipment performance....
Advanced SDR platform eases multiprotocol radio development
Jan 1, 2007
By Louis Belanger This article describes a low-cost integrated hardware and software platform employing a software-defined
radio approach that expedites development of multiprotocol
radios for military, public safety and commercial applications....
Mitigating interference to maximize spectral efficiency in 3G/4G networks
Sep 1, 2006
By John Thomas This
article describes an interference cancellation technology comprising
an ASIC/core hardware and DSP-based software, which
cancels interference from all traffic channels, and from all interfering sources for 2.5G, 3G and 4G networks....
IQ modulators advance reconfigurable radio
Jun 1, 2006
By Eamon Nash While true software-defined radio has yet to be implemented cost effectively
for general applications, improvements in signal-processing functions such
as IQ modulators move the RF industry ever closer to that goal....
New SDR architecture enables ubiquitous data connectivity
Jan 1, 2006
By John A. Kilpatrick; Russell J. Cyr; Erik L. Org and Geoffrey Dawe While WiFi in the laptop has enabled unheralded mobility for many, WiFi hotspot coverage is not ubiquitous, limiting where laptops can be connected. Although software-defined radio is the right technology to stitch together these services for ubiquitous global laptop architectures make it uneconomical. ...
Software-defined radio poses major challenges for hardware and software developers
Jun 1, 2005
By Steve Grossman, Contributing Editor To fulfill the requirements of the Joint Tactical Radio System program, lowerdissipation FPGAs and more sophisticated DSPs must be developed to enable migrating software programmability closer to the antenna....
Clever software strategies for solving high-level system solutions
May 1, 2005
By Rodger H. Hosking With time-to-market crunches, limited-development resources and no tolerance for trial and error, today's project managers are urgently seeking lower-risk strategies for embedded system development....
Mathematical basics of bandlimited sampling and aliasing
Jan 1, 2005
By Vladimir Vitchev Modern applications often require that we sample analog signals, convert them
to digital form, perform operations on them, and reconstruct them as analog
signals. The important question is how to sample and reconstruct an analog
signal while preserving the full information of the original....
Understanding the sampling process
Sep 1, 2004
By R. N. Mutagi Sampling is the first step in the process of converting a continuous analog
signal to a sequence of digital numbers. This article provides an insight into
time and frequency domains of sampled signals. The concept of the spectral
window, defined by the sampling process, helps understand digital signals
and signal processing....
DSP brings base station SDR reality
Sep 1, 2004
By Andy McCann and Brad Brannon Developments in digital signal processing and data conversion are enabling the commercialization of software-based wideband receiver, thereby reducing the cost, size, complexity and power consumption of a base station. Moreover, with the emergence of powerful DSP processors, base stations can now support a multilingual variety of air/modulation schemes and protocols....
FPGA-based Applications for Software Radio
May 1, 2004
By Angsuman Rudra Software radio technology offers the ability to develop radio architectures with
programmable intermediate frequency, bandwidth, modulation and coding
schemes. Field-programmable gate array is important in multimission software
radio applications like electronic warfare, radar, communications and RF testing....
