torchsig.utils.dsp

Digital Signal Processing (DSP) Utils

Functions

bandwidth_from_lower_upper_freq	Calculates bandwidth from lower frequency and upper frequency
center_freq_from_lower_upper_freq	Calculates center frequency from lower frequency and upper frequency
compute_spectrogram	Computes two-dimensional spectrogram values in dB.
convolve	Wrapper function to implement convolution()
design_half_band_filter	Designs half band filter weights for dyadic resampling
estimate_filter_length	Estimates FIR filter length
estimate_tone_bandwidth	Estimate the bandwidth of a tone
frequency_shift	Performs a frequency shift
gaussian_taps	Designs Gaussian filter weights
interpolate_power_of_2_resampler	Applies power of 2 resampling
is_even	Is the number even?
is_multiple_of_4	Is the number a multiple of 4?
is_odd	Is the number odd?
low_pass	Low-pass filter design
low_pass_iterative_design	Iteratively designs a low-pass filter using the window method, adjusting the filter length to meet the desired stopband attenuation.
lower_freq_from_center_freq_bandwidth	Calculates the lower frequency from center frequency and bandwidth
multistage_polyphase_decimator	Multi-stage polyphase filterbank-based decimation
multistage_polyphase_interpolator	Multi-stage polyphase filterbank-based interpolation
multistage_polyphase_resampler	Multi-stage polyphase filterbank-based resampling.
noise_generator	Generates additive complex noise of specified power and type.
pad_head_tail_to_length	Zero pads the head and tail of a signal
partition_polyphase	Partitions filter coefficients into a polyphase filter bank.
polyphase_decimator	Integer-rate polyphase filterbank-based decimation
polyphase_fractional_resampler	Fractional rate polyphase resampler
polyphase_integer_interpolator	Integer-rate polyphase filterbank-based interpolation
prototype_polyphase_filter	Designs the prototype filter for a polyphase filter bank
prototype_polyphase_filter_decimation	Designs polyphase filterbank weights for decimation
prototype_polyphase_filter_interpolation	Designs polyphase filterbank weights for interpolation
sampling_clock_impairments	Implements sampling clock impairments (jitter and drift) using polyphase filtering.
slice_head_tail_to_length	Slices the head and tail of a signal
slice_tail_to_length	Slices the tail of a signal
srrc_taps	Designs square-root raised cosine (SRRC) pulse shaping filter
upconversion_anti_aliasing_filter	Applies a BPF to avoid aliasing
update_signal_snr_bandwidth	Updates the SNR and bandwidth of a signal based on dataset parameters.
upper_freq_from_center_freq_bandwidth	Calculates upper frequency from center frequency and bandwidth
upsample	Upsamples a signal