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....
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....
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....
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....
Little known characteristics of phase noise
Mar 1, 2004
By Paul Smith A wealth of information is available on the topic of phase noise, its A characteristics, how it can be measured, and how it affects system performance....
Understanding the Discrete Fourier Transform
Jan 1, 2004
By R. N. Mutagi Discrete Fourier Transform (DFT) is used extensively in signal processing applications such as communications, broadcasting, entertainment and many other...
