The fixed-point tag has no wiki summary.
1
vote
1answer
45 views
conversion of adc output to fixed point format
I want to convert the 2s complement, 16-bit output from an ADC into a generic fixed point format, Qm.n, where m is the no. of integer bits and n is the no. of fraction bits.
Any hints/procedure to do ...
2
votes
1answer
35 views
Converting floating point number to Q-notation fixed point number in C/Java?
I am trying to convert from a floating point number to a Q-notation signed 16-bit fixed point number (e.g. Q15). How can this be done in C or Java? I searched online but could not find any available ...
3
votes
0answers
48 views
derivation of fixed-point atan2 with self normalization
I'm trying to understand the math behind
http://dspguru.com/dsp/tricks/fixed-point-atan2-with-self-normalization
which describes a self-normalizing fixed-point version of atan2().
In particular, ...
6
votes
1answer
90 views
Fixed point multiplication with negative numbers
I am stumped on a simple problem. Let's say I have two 4 bit numbers in Q0.3 format. One sign bit and three fractional bits. So I can represent $-1$ through to $0.875$.
Let's now say I wish to do ...
0
votes
0answers
49 views
Word-length optimization of a fixed point chain of multipliers
Let's suppose a chain of 6 multipliers: $b = a_1*a_2*a_3*a_4*a_5*a_6*a_7$, where $b$ is the output, and $a_i$ the inputs with 16 bits. How can I optimize the word lengths of the output of each ...
5
votes
5answers
300 views
When to consider double (64 bit) floating point for Audio
When synthesizing and processing audio on modern processors, when would one consider using something other than single precision (32 bit) floating point? Obviously, the audio coming in and going out ...
4
votes
5answers
233 views
Relative merits of fixed point vs floating point computation?
I have a digital signal processing system that operates on a fast x86 machine using double precision floating point numbers.
It occurred to me that I am not really using the huge dynamic range of the ...
