AN2263 Freescale Semiconductor / Motorola, AN2263 Datasheet - Page 5

• Manufacturer Part Number: AN2263
• Description: PC Master Software: Creation of Advanced Control Pages
• Manufacturer: Freescale Semiconductor / Motorola

Target Board
Application
Description
MOTOROLA
PC Master Software: Creation of Advanced Control Pages
The target board application block diagram is shown in
The source signal is generated by the application as the sum of two sine waves
with adjustable amplitudes and frequencies (phase increments per sample).
The signal is delayed by an adjustable number of samples (D) and this
delayed signal is connected to the input x(n) of the LMS (least mean square)
adaptive processor. The original version of the source signal is connected to
the processor desired response d(n). The aim of the adaptive processor is to
minimize the error signal e(n) that is the difference between the output signal
y(n)
and desired response d(n). As the result, the adaptive processor builds a model
of the incoming signal such that it can predict D samples of source signal. The
order (N) and the adaptation step-size (mi) of the adaptive FIR processor is
also adjustable in the application.
All the target board application parameters can be adjusted using the watch
window in the PC master software application. The signals generated in the
target board application can be monitored in the oscilloscope and recorder
charts.
following application signals:
The more the processor is adapted, the closer the output signal is to the desired
response.
The PC master software oscilloscope in
processor FIR coefficients w(n) during the adaptation together with the error
signal e(n).
Appendix A
application main routine.
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•
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Freescale Semiconductor, Inc.
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For More Information On This Product,
Processor input signal x(n)
Processor desired response d(n)
Processor output signal y(n)
produced by a FIR (finite input response) system from the input x(n)
Figure 4
contains the C-language source code of the target board
Go to: www.freescale.com
Figure 3. Board Application Block Diagram
shows the PC master software recorder chart displaying the
Figure 5
shows the evolution of the
Figure
Example: Step-by-Step Guide
3.
AN2263/D
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