Howtosignalprocessing
- How do you represent negative numbers in fixed points?
- What is the multiplication rule with negative numbers?
- Do negatives cancel out in multiplication?
- How to do fixed-point multiplication?
How do you represent negative numbers in fixed points?
How do we represent fixed point negative numbers then? In computer, we use 2's complement to represent negative numbers. One of the property of 2's complement numbers is that arithmetic operations of either positive of negative numbers are identical.
What is the multiplication rule with negative numbers?
You also have to pay attention to the signs when you multiply and divide. There are two simple rules to remember: When you multiply a negative number by a positive number then the product is always negative. When you multiply two negative numbers or two positive numbers then the product is always positive.
Do negatives cancel out in multiplication?
Yes indeed, two negatives make a positive, and we will explain why, with examples!
How to do fixed-point multiplication?
To perform fixed-point multiplication, we can first ignore the binary point of the multiplier and multiplicand, perform the multiplication treating the operands as two's complement numbers, and, then, determine the position of the binary point for the result.
