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/* -*- c++ -*- */
/* Copyright 2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DIGITAL_OFDM_SERIALIZER_VCC_H
#define INCLUDED_DIGITAL_OFDM_SERIALIZER_VCC_H
#include <digital/api.h>
#include <gr_tagged_stream_block.h>
#include <digital_ofdm_carrier_allocator_cvc.h>
namespace gr {
namespace digital {
/*!
* \brief Serializes complex modulations symbols from OFDM sub-carriers
* \ingroup ofdm_blk
*
* This is the inverse block to the carrier_allocator_cvc. It outputs the
* complex data symbols as a tagged stream, discarding the pilot symbols.
*
* If given, two different tags are parsed: The first key (\p len_tag_key)
* specifies the number of OFDM symbols in the frame at the input. The
* second key (\p packet_len_tag_key) specifies the number of complex symbols
* that are coded into this frame. If given, this second key is then used
* at the output, otherwise, \p len_tag_key is used.
* If both are given, the packet length specifies the maximum number of
* output items, and the frame length specifies the exact number of
* consumed input items.
*
* Input: Complex vectors of length \p fft_len
* Output: Complex scalars, in the same order as specified in occupied_carriers.
*/
class DIGITAL_API ofdm_serializer_vcc : virtual public gr_tagged_stream_block
{
public:
typedef boost::shared_ptr<ofdm_serializer_vcc> sptr;
/*!
* \param fft_len FFT length
* \param occupied_carriers See ofdm_carrier_allocator_cvc.
* \param len_tag_key The key of the tag identifying the length of the input frame in OFDM symbols.
* \param packet_len_tag_key The key of the tag identifying the number of complex symbols in this packet.
* \param symbols_skipped If the first symbol is not allocated as in \p occupied_carriers[0], set this
* \param input_is_shifted If the input has the DC carrier on index 0 (i.e. it is not FFT shifted), set this to false
*/
static sptr make(
int fft_len,
const std::vector<std::vector<int> > &occupied_carriers,
const std::string &len_tag_key="frame_len",
const std::string &packet_len_tag_key="",
int symbols_skipped=0,
bool input_is_shifted=true
);
/*!
* \param allocator The carrier allocator block of which this shall be the inverse
* \param packet_len_tag_key The key of the tag identifying the number of complex symbols in this packet.
* \param symbols_skipped If the first symbol is not allocated as in \p occupied_carriers[0], set this
* \param input_is_shifted If the input has the DC carrier on index 0 (i.e. it is not FFT shifted), set this to false
*/
static sptr make(
const digital_ofdm_carrier_allocator_cvc_sptr &allocator,
const std::string &packet_len_tag_key="",
int symbols_skipped=0,
bool input_is_shifted=true
);
};
} // namespace digital
} // namespace gr
#endif /* INCLUDED_DIGITAL_OFDM_SERIALIZER_VCC_H */
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