Digital and DSP

• Multirate I/Q Signal Processing for communication systems (M. Valkama and M. Renfors)
  PDF: Local pdf
• Modulation and Demodulation Techniques in Communication Systems (Nasa)
  PDF: Local pdf
• An Introduction to Sigma Delta Conversion (AN9504, Intersil)
  PDF: Local pdf
• Demystifying Delta-Sigma ADCs (app 1870, Maxim)
  PDF: Local pdf
  Source: Site link
• Digital Signal processing online book series (J. O. Smith, Stanford)
  Site link: Site link
• Site link to all EU material: Source link
• Java Applets on Control and DSP (Johns Hopkins University)
  Site Link: Site link
• Introduction to Digital Filters (J. O. Smith III, On-line Book)
  Site Link: Site Link