Modeling of Digital Communication Systems Using SIMULINK

Chapter 13Simulink Examples

Simulink modeling is employed in many areas of engineering, including digital communications systems, which is the focus of this book. This chapter presents a number of illustrative examples; the topics covered here include the following:

• Linear predictive coding (LPC) for speech compression
• RLS interference cancellation
  • Sinusoidal interference
  • Low pass filtered Gaussian noise
• Spread spectrum
  • Sinusoidal interference
  • Excision using an RLS canceller
• Antenna nulling of a single interferer
• Kalman filtering
  • Scalar Kalman
  • Kalman equalizer
  • Radar tracking using extended Kalman filter (EKF)
• Orthogonal frequency division multiplexing (OFDM)
• Turbo coding with BPSK

The models described here are available on the companion website, www.wiley.com/go/simulink. The reader is encouraged to execute the models and experiment with the parameters of the model and selections made for running the model.

13.1 Linear Predictive Coding (LPC) for Speech Compression

LPC is a well-known technique for compressing speech. It is based on an all-pole model where a current speech sample s(n) is estimated by a linear sum of L prior samples weighted with prediction coefficients , thus producing an error signal e(n), that is,

The sum is an estimate of the speech segment and is denoted ...