CEPD News 
October, 2009 - Vol 2, Issue 7



In This Issue
On the Move
Society News
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We are moving! 
We are excited about upgrading with this move into our new facility later this month. We have the entire first floor. The address is 2995 Center Green Court, Suite A., Boulder, Colorado 80301, which is just a block over from our old address. Please make a note of it.
Last month we investigated Chua's analog chaos circuit.  This month we investigate chaos in a dsp difference equation.  The logistic map difference equation is written x[n+1] = r * x[n] * (1-x[n]). The logistic map has been used to model population growth with r representing the reproduction rate and x[n] the normalized population at year n.  The plot of iterative x values vs. r yields a non-intuitive, complicated, bifurcation diagram.  Notice how the bifurcation diagram (bottom) is related to the Mandelbrot set fractal.  If you would like source code and a program which generates a bifurcation diagram, it can be downloaded here.  Reference: [1] Chaos, Fractals and Dynamics by Devaney [2] Wikipedia

Bifurcation Diagram

Society News
Call for presentations: The IEEE Signal Processing Society is looking for speakers to present topics of interest to them in signal processing.  Please contact the SPS if you are interested.
Joe Carey of Fidelity Comtech will be presenting a talk on Phased Array Antenna Technologies on October 13th. Visit the IEEE ComSoc site for more information or to RSVP.
More Links
There is a wealth of free engineering information and there are many free design tools available on the internet. We have decided to continue updating our favorite links and have posted them on our web site.
If you would like help developing a new product or if you find your project under staffed, CEPD can help you meet your deadlines. Our staff draws on years of diverse product design experience to provide creative and timely solutions for your product needs. Some of our specialties include:
  • DSP
  • Embedded Systems Hardware and Software
  • Data Acquisition
  • Wireless Sensor and Telemetry Systems (Zigbee, Cellular, VHF, etc.)
  • Motor Control Systems
  • Programmable Logic: FPGA / CPLD / EPLD
  • Analog Circuit Design
  • Switching Power Supply Design
  • PCB Design and Layout
  • Analysis and Documentation
Our goal is to provide cost effective and expedient design options for our clients. Our services range from an hour of consultation to large turn-key product development projects. We provide detailed proposals, accurate estimates and time schedules to help you manage each phase of the project. We can offer fixed cost or time and materials proposals to suit your specific needs. There is no cost to you for the proposals we create and the initial discussions required!
The Staff of CEPD, Inc.
2009, CEPD, Inc.             
 303 415-1112    Fax 720 306-4445