Fixed-Point Blockset

Summary

From the previous analysis of fixed-point variables scaled within the general slope/bias encoding scheme, you can conclude:

• Addition, subtraction, multiplication, and division can be very involved unless certain choices are made for the biases and slopes.
• Radix point-only scaling guarantees simpler math, but generally sacrifices some precision.
• It is important to note that the previous formulas don't show that:
• Constants and variables are represented with a finite number of bits.
• Variables are either signed or unsigned.
• The rounding and overflow handling schemes. These decisions must be made before an actual fixed-point realization is achieved.

Division

Parameter and Signal Conversions