Section¶

class GridSection(num_repetitions=1, sample_offset=0, wave=None)[source]¶

Description of a part of a grid’s time domain.

Parameters:

num_repetitions (int) – Number of times this section is repeated in time-domain.
sample_offset (int) – Offset in samples to the start of the section.
wave (Optional[TypeVar(OWT, bound= OrthogonalWaveform)]) – Waveform this section is associated with. Defaults to None.

abstract pick_samples(signal)[source]¶

Pick this section’s samples from the time-domain signal.

Parameters:: signal (ndarray) – Time-domain signal to be picked from. Numpy vector of size num_samples.
Return type:: ndarray

Returns: Time-domain signal with the section’s samples picked.

pick_symbols(grid)[source]¶

Pick this section’s data symbols from the resource grid.

Parameters:: grid (ndarray) – Resource grid. Two dimensional numpy array of size num_words`x`num_subcarriers.
Return type:: ndarray

Returns: Data symbols. Numpy vector of size num_symbols.

abstract place_samples(signal)[source]¶

Place this section’s samples into the time-domain signal.

Parameters:: signal (ndarray) – Time-domain signal to be placed. Numpy vector of size num_samples.
Return type:: ndarray

Returns: Time-domain signal with the section’s samples placed.

place_symbols(data_symbols, reference_symbols)[source]¶

Place this section’s symbols into the resource grid.

Parameters:

data_symbols (ndarray) – Data symbols to be placed. Numpy vector of size num_symbols.
reference_symbols (ndarray) – Reference symbols to be placed. Numpy vector of size num_references.

Return type:

ndarray

Returns: Two dimensional numpy array of size num_words`x`num_subcarriers.

serialize(process)[source]¶

Serialize this object’s state.

Objects cannot be serialized directly, instead a Factory must be instructed to carry out the serialization process.

Parameters:: process (SerializationProcess) – The current stage of the serialization process. This object is generated by the Factory and provides an interface to serialization methods supporting multiple backends.
Return type:: None

property num_references: int¶: Number of data symbols this section can modulate.

property num_repetitions: int¶: Number of section repetitions in the time-domain of an OFDM grid.

abstract property num_samples: int¶: Number of samples within this OFDM time-section.

property num_subcarriers: int¶: Number of subcarriers this section requires.

property num_symbols: int¶: Number of data symbols this section can modulate.

property num_words: int¶: Number of OFDM symbols, i.e. words of subcarrier symbols this section can modulate.

property sample_offset: int¶

Offset in samples to the start of the section.

This can be used to explot cyclic prefixes and suffixes in order to be more robust against timing offsets.