| | 13 | |
| | 14 | ---- |
| | 15 | '''Changes in v1.7.4:''' |
| | 16 | |
| | 17 | '''PHY and MAC Hardware Changes:'''[[BR]] |
| | 18 | * Redesigned DSSS receiver in Rx PHY core |
| | 19 | * Much more robust detection and decoding of packets at mid and low SNRs |
| | 20 | * Added support for 2Mb (DQPSK) DSSS waveforms; {{{RX_DSSS}}} log entries now encode rate in MCS field ({{{MCS=0}}} for 1Mbps, {{{MCS=1}}} for 2Mbps) |
| | 21 | * Dropped support for 802.11-2016 Clause 15 waveforms (i.e. DSSS before 802.11b); all Wi-Fi devices we tested use supported Clause 16 (11b) waveforms |
| | 22 | * Redesigned Rx packet detector logic |
| | 23 | * Separated magnitude calculations for DSSS and OFDM detectors |
| | 24 | * Refined data types for correlation and energy thresholds for better configuration range across SNRs |
| | 25 | * Added registers to independently disable OFDM and DSSS receive pipelines, controlled via {{{n.enable_ofdm_rx(bool)}}} and {{{n.enable_dsss(bool)}}} wlan_exp methods |
| | 26 | * Updated delays through and around AGC DCO filter to fix sample-skipping during AGC settling |
| | 27 | * Added optional AGC mode (disabled by default) to leave RXHP disabled after a reception, re-enabled at pkt detection; default is to re-assert RXHP at RX_END |
| | 28 | * Added inputs to MAC core |
| | 29 | * {{{FORCE_CCA_BUSY}}}: holds CCA busy independent of other MAC state |
| | 30 | * {{{START_POSTRX_TIMER1}}}: starts the PostRx Timer 1, useful to time a SIFS when RX_END is inferred from logic other than the Rx PHY |
| | 31 | * {{{AUX_MAC_HW_STATUS}}}: inputs routed to MAC {{{STATUS}}} register, useful for polling non-MAC status signals in lockstep with other MAC state |
| | 32 | |
| | 33 | ''Python changes:'''[[BR]] |
| | 34 | * Refined type checking in many functions to be less arbitrary in requiring specific types |
| | 35 | * Added {{{n.disable_ofdm_rx()}}} method to control whether the OFDM Rx pipeline is enabled |
| | 36 | * Added {{{n.configure_ofdm_pkt_det()}}} and {{{n.configure_dsss_pkt_det()}}} methods to configure Rx packet detection thresholds |
| | 37 | * Added warnings when a node's active scan state machine is running when Python changes the node's channel or association state |
| | 38 | |
| | 39 | ''C code changes:'''[[BR]] |
| | 40 | * Updated defaults in {{{wlan_phy_init()}}} for redesigned DSSS Rx PHY and OFDM/DSSS packet detector params |
| | 41 | * Fixed bug in argument handling in IPC message for setting Tx power |
| | 42 | * Updated wlan_exp_ip_udp header struct definitions to properly describe 2-byte padding in transport header, not 2-byte delimiter in IP/UDP header |
