diff options
Diffstat (limited to 'gr-digital/lib/ofdm_cyclic_prefixer_impl.h')
| -rw-r--r-- | gr-digital/lib/ofdm_cyclic_prefixer_impl.h | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/gr-digital/lib/ofdm_cyclic_prefixer_impl.h b/gr-digital/lib/ofdm_cyclic_prefixer_impl.h index 20f0489d7c..5a5766f131 100644 --- a/gr-digital/lib/ofdm_cyclic_prefixer_impl.h +++ b/gr-digital/lib/ofdm_cyclic_prefixer_impl.h @@ -1,6 +1,6 @@ /* -*- c++ -*- */ -/* - * Copyright 2004-2006,2011,2012 Free Software Foundation, Inc. +/* + * Copyright 2013 Free Software Foundation, Inc. * * This file is part of GNU Radio * @@ -27,23 +27,38 @@ namespace gr { namespace digital { - + class ofdm_cyclic_prefixer_impl : public ofdm_cyclic_prefixer { - private: - size_t d_input_size; + private: + size_t d_fft_len; + //! FFT length + CP length in samples size_t d_output_size; + //! Length of the cyclic prefix in samples + int d_cp_size; + //! Length of pulse rolloff in samples + int d_rolloff_len; + //! Buffers the up-flank (at the beginning of the cyclic prefix) + std::vector<float> d_up_flank; + //! Buffers the down-flank (which trails the symbol) + std::vector<float> d_down_flank; + std::vector<gr_complex> d_delay_line; // We do this explicitly to avoid outputting zeroes (i.e. no history!) + + protected: + int calculate_output_stream_length(const gr_vector_int &ninput_items); - public: - ofdm_cyclic_prefixer_impl(size_t input_size, size_t output_size); + public: + ofdm_cyclic_prefixer_impl(size_t input_size, size_t output_size, int rolloff_len, const std::string &len_tag_key); ~ofdm_cyclic_prefixer_impl(); int work(int noutput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items); + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); }; - } /* namespace digital */ -} /* namespace gr */ + } // namespace digital +} // namespace gr #endif /* INCLUDED_DIGITAL_OFDM_CYCLIC_PREFIXER_IMPL_H */ + |