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A Quadrature Signals Tutorial: Complex, But Not Complicated
Click Here for a PDF version of this article Introduction Quadrature signals are based on the notion of complex numbers and perhaps no other topic causes more heartache for newcomers to DSP than th...
posted by Rick Lyons on Apr 12 2013 under Basics | Communication | Tutorial Comments (3) |
Understanding the 'Phasing Method' of Single Sideband Demodulation
Download the pdf version There are four ways to demodulate a transmitted single sideband (SSB) signal. Those four methods are: synchronous detection, phasing method, Weaver method, and filter...
posted by Rick Lyons on Aug 8 2012 under Communication Comments (6) |
Understanding and Relating Eb/No, SNR, and other Power Efficiency Metrics
Introduction Evaluating the performance of communication systems, and wireless systems in particular, usually involves quantifying some performance metric as a function of Signal-to-Noise-Ratio (SN... 
posted by Eric Jacobsen on May 29 2012 under Wireless | Communication Comments (1) |
Some Observations on Comparing Efficiency in Communication Systems
Introduction Engineering is usually about managing efficiencies of one sort or another. One of my favorite working definitions of an engineer says, "An engineer is somebody who can do for a nickel ...
posted by Eric Jacobsen on Mar 17 2011 under Wireless | Communication Comments (0) |
Implementing a full-duplex UART using the TMS320VC33 serial port
Although the TMS320VC33 serial port was designed to be used as a synchronous port, it can also be used as an asynchronous port under software control. This post describes the hardware and software nee... 
posted by Manuel Herrera on Mar 16 2011 under Basics | Tips and Tricks | Communication Comments (2) |
A multiuser waterfilling algorithm
Hello,this blog entry documents a code snippet for a multi-user waterfilling algorithm. It's heuristic and relatively straightforward, making it easy to implement additional constraints or rules.I rew... 
posted by Markus Nentwig on Nov 5 2010 under Wireless | Communication Comments (0) |
Radio Frequency Distortion Part II: A power spectrum model
Summary This article presents a ready-to-use model for nonlinear distortion caused by radio frequenfcy components in wireless receivers and linear transmitters. Compared to the similar model pre...
posted by Markus Nentwig on Oct 11 2010 under Matlab | Wireless | Communication Comments (1) |
Understanding Radio Frequency Distortion
Overview The topic of this article are the effects of radio frequency distortions on a baseband signal, and how to model them at baseband. Typical applications are use as a simulation model or i...
posted by Markus Nentwig on Sep 26 2010 under Basics | Wireless | Communication Comments (0) |
Frequency Dependence in Free Space Propagation
IntroductionIt seems to be fairly common knowledge, even among practicing professionals, that the efficiency of propagation of wireless signals is frequency dependent. Generally it is believed that lo...
posted by Eric Jacobsen on May 14 2008 under Basics | Wireless | Communication Comments (4) |
Pulse Shaping in Single-Carrier Communication Systems
Some common conceptual hurdles for beginning communications engineers have to do with "Pulse Shaping" or the closely-related, even synonymous, topics of "matched filtering", "...
posted by Eric Jacobsen on Apr 10 2008 under Basics | Wireless | Communication Comments (30) |