Real2Complex

class baseband_tasks.conversion.Real2Complex(ih, samples_per_frame=None)

Bases: baseband_tasks.base.TaskBase

Convert a real baseband signal to a complex baseband signal.

This task computes the analytic representation of the input signal via a Hilbert transform, throwing away negative frequency components. Then, the signal is shifted in frequency domain by -B/2 where B is the bandwidth of the signal. Finally, the signal is decimated by a factor of 2, which results in the complex baseband representation of the input signal.

Parameters

ihtask or baseband stream reader

Input data stream, with time as the first axis.

samples_per_frameint, optional

Number of complete output samples per frame (see Notes). Default: Half the number of samples per frame in the input stream.

Raises

ValueError

If ih has complex data.

See also

baseband_tasks.fourier.fft_maker

to select the FFT package used.

Notes

This function assumes the input signal is a causal signal.

References

Methods Summary

task(data)

Methods Documentation

task(data)