#include <digital_api.h>
#include <gr_block.h>
#include <vector>

Classes
class	digital_ofdm_frame_acquisition
	take a vector of complex constellation points in from an FFT and performs a correlation and equalization.This block takes the output of an FFT of a received OFDM symbol and finds the start of a frame based on two known symbols. It also looks at the surrounding bins in the FFT output for the correlation in case there is a large frequency shift in the data. This block assumes that the fine frequency shift has already been corrected and that the samples fall in the middle of one FFT bin. More...
Functions
digital_ofdm_frame_acquisition_sptr DIGITAL_API	digital_make_ofdm_frame_acquisition (unsigned int occupied_carriers, unsigned int fft_length, unsigned int cplen, const std::vector< gr_complex > &known_symbol, unsigned int max_fft_shift_len=10)

Function Documentation

digital_ofdm_frame_acquisition_sptr DIGITAL_API digital_make_ofdm_frame_acquisition	(	unsigned int	occupied_carriers,
		unsigned int	fft_length,
		unsigned int	cplen,
		const std::vector< gr_complex > &	known_symbol,
		unsigned int	max_fft_shift_len = `10`
	)

Parameters:

occupied_carriers	The number of subcarriers with data in the received symbol
fft_length	The size of the FFT vector (occupied_carriers + unused carriers)
cplen	The length of the cycle prefix
known_symbol	A vector of complex numbers representing a known symbol at the start of a frame (usually a BPSK PN sequence)
max_fft_shift_len	Set's the maximum distance you can look between bins for correlation

digital_ofdm_frame_acquisition.h File Reference