bandedgeFrequencies

Compute the bandedge frequencies

Syntax

w = bandedgeFrequencies(obj)

f = bandedgeFrequencies(obj,Fs)

Description

w = bandedgeFrequencies(obj) returns a vector of normalized frequencies, w, containing the bandedge frequencies between adjacent bandpass filters in the dsp.Channelizer System object™.

f = bandedgeFrequencies(obj,Fs) returns a vector of bandedge frequencies in Hz, using the sample rate Fs.

Examples

Bandedge Frequencies of Channelizer

Compute the normalized bandedge frequencies of the bandpass filters in a channelizer using the bandedgeFrequencies function.

channelizer = dsp.Channelizer;
w = bandedgeFrequencies(channelizer)

w = 1×8

   -2.7489   -1.9635   -1.1781   -0.3927    0.3927    1.1781    1.9635    2.7489

To compute the frequencies in Hz, pass a sampling frequency, Fs.

$$f=(\omega /2\pi )\times Fs$$

where:

• f is frequency in Hz.

• $$\omega$$ is frequency in radians.

Here, the sampling frequency is 44,100 Hz.

f = bandedgeFrequencies(channelizer,44100)

f = 1×8
104 ×

   -1.9294   -1.3781   -0.8269   -0.2756    0.2756    0.8269    1.3781    1.9294

Input Arguments

obj — Input filter System object

dsp.Channelizer

Input filter, specified as a dsp.Channelizer System object.

Fs — Sample rate

positive scalar

Sample rate used to compute the bandedge frequencies in Hz, specified as a positive scalar.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Output Arguments

w — Normalized bandedge frequencies

row vector

Normalized frequencies containing the bandedge frequencies between adjacent bandpass filters in the channelizer, returned as a row vector. The length of the vector equals the number of frequency bands.

Data Types: double

f — Bandedge frequencies in Hz

row vector

Bandedge frequencies in Hz, returned as a row vector. The length of the vector equals the number of frequency bands. To return the frequencies in Hz, input the sample rate, Fs. Frequency in Hz is given by [w/(2π)]×Fs, where w is the normalized frequency in rad/sample, and Fs is the sampling rate in Hz.

Data Types: double

Version History

Introduced in R2017b