svensl
Full Member level 1
Hello,
I have a question whether/what relationship there is between the probability function and the power spectral density.
For example: If we consider data converters. When quantizing a signal then we often assume that the introduced error is uniformly distributed between -q/2 and q/2. Here q is the quantization step. In sigma delta converters, this error is shaped by a noise transfer function, often 1-z^(-1). Thus subtracting two consecutive errors equals noise shaping.
When looking at it from two errors each having a uniform distribution with probability of 1, then after subtracting them, I get a triangular probability. My question is how I can relate this triangular probability to the noise shaping function 1-z^(-1). For example, what constitutes the attenuation.
Can anyone help me find a connection?
Thanks
I have a question whether/what relationship there is between the probability function and the power spectral density.
For example: If we consider data converters. When quantizing a signal then we often assume that the introduced error is uniformly distributed between -q/2 and q/2. Here q is the quantization step. In sigma delta converters, this error is shaped by a noise transfer function, often 1-z^(-1). Thus subtracting two consecutive errors equals noise shaping.
When looking at it from two errors each having a uniform distribution with probability of 1, then after subtracting them, I get a triangular probability. My question is how I can relate this triangular probability to the noise shaping function 1-z^(-1). For example, what constitutes the attenuation.
Can anyone help me find a connection?
Thanks