NOTICE

opendsss — NOTICE
=================

This project is licensed under the GNU General Public License, version 2 or
later (GPL-2.0-or-later). See the LICENSE file for the full text.

Attribution
-----------
The DSSS receiver PHY (opendsss_rx) is a SystemVerilog port of the DSSS
receiver in bladeRF-wiphy:

    bladeRF-wiphy — Copyright (C) 2020 Nuand, LLC.
    https://github.com/Nuand/bladeRF-wiphy   (GPL-2.0-or-later)

The following files are ports of the corresponding bladeRF-wiphy VHDL and
retain Nuand's copyright in addition to the porting author's:

    dsss_controller.sv   <- wlan_dsss_rx_controller.vhd
    dsss_p_norm.sv       <- wlan_dsss_p_norm.vhd
    dsss_despreader.sv   <- wlan_dsss_despreader.vhd
    dsss_peak_finder.sv  <- wlan_dsss_peak_finder.vhd
    dsss_demodulator.sv  <- wlan_dsss_demodulator.vhd
    dsss_framer.sv       <- wlan_dsss_rx_framer.vhd
    dsss_crc.sv          <- wlan_crc.vhd
    dsss_plcp_crc.sv     <- wlan_dsss_plcp_crc.vhd
    dsss_rx.sv           <- wlan_dsss_rx.vhd

Original work
-------------
The following are original works (Copyright (C) 2026 Will Scales), written from
the IEEE 802.11 standard and licensed GPL-2.0-or-later:

    dsss_farrow.sv       sub-sample (Farrow) fractional-delay interpolator
    dsss_mu_track.sv     feedforward sub-sample timing estimator
    dsss_rx_fb.sv        RX top composition (variant B, Farrow timing recovery)
    dsss_rx_and_mux.sv   OFDM/DSSS RX coexistence arbiter (OFDM priority)
    dsss_tx.sv           1 Mbps DBPSK long-preamble DSSS modulator
    dsss_tx_and_mux.sv   OFDM/DSSS TX coexistence arbiter

The coexistence arbiters read the stock openofdm `demod_is_ongoing` output and
gate the stock openofdm transmit start; no changes to openofdm are required.