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....
Evaluating distortion in ADC driver amplifiers
May 1, 2006
By Eamon Nash In order to fully harness the potential of high-performance ADCs for applications such as software-defined radio, the components defining the input signal pathway must have matching levels of performance....
New technology facilitates true software-defined radio
Apr 1, 2005
By Ronald M. Hickling While the article summarizes products available for software-radio application, it presents for the first time a carrier speed 5 GHz RF to a digital converter, which when coupled with state-of-the-art filtering software, can be used to meet the SDR Forum's definition of the ideal software radio....
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....
High-speed 14-bit DAC breaks 1 Gsps barrier
Apr 1, 2004
Combining 0.18 m CMOS process with patent-pending switch current array, designers at Analog Devices have developed an unmatched 14-bit digital-to-analog...
