digital_ofdm_cyclic_prefixer.h File Reference

#include <digital_api.h>
#include <gr_tagged_stream_block.h>

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Classes
class	digital_ofdm_cyclic_prefixer
	Adds a cyclic prefix and performs pulse shaping on OFDM symbols.Input: OFDM symbols (in the time domain, i.e. after the IFFT). Optionally, entire frames can be processed. In this case, len_tag_key must be specified which holds the key of the tag that denotes how many OFDM symbols are in a frame. Output: A stream of (scalar) complex symbols, which include the cyclic prefix and the pulse shaping. Note: If complete frames are processed, and rolloff_len is greater than zero, the final OFDM symbol is followed by the delay line of the pulse shaping. More...
Functions
DIGITAL_API digital_ofdm_cyclic_prefixer_sptr	digital_make_ofdm_cyclic_prefixer (size_t input_size, size_t output_size, int rolloff_len=0, const std::string &len_tag_key="")

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Function Documentation

DIGITAL_API digital_ofdm_cyclic_prefixer_sptr digital_make_ofdm_cyclic_prefixer	(	size_t	input_size,
		size_t	output_size,
		int	rolloff_len = 0,
		const std::string &	len_tag_key = ""
	)

Parameters:

input_size	FFT length (i.e. length of the OFDM symbols)
output_size	FFT length + cyclic prefix length (in samples)
rolloff_len	Length of the rolloff flank in samples
len_tag_key	For framed processing the key of the length tag