Changes between Version 89 and Version 90 of 802.11/Changelog

Timestamp:

Dec 12, 2014, 1:57:40 PM (9 years ago)

Author:

murphpo

Comment:

--

802.11/Changelog

@@ -11 +11 @@
 
 '''PHY/MAC Hardware Changes:'''
- * Shifted Tx power settings from [-12,19] to [-9,21]
+ * Updated supported Tx power range to [-9,21] dBm
  * After a thorough characterization campaign, we changed a couple of default values for Tx parameters
   * BB gain now 1 instead of 2
   * PA linearity is now 2 instead of 0
- * Reduced default RSSI averaging from 8 samples to 4 for reduced delay
- * Added new RSSI packet detection logic that optionally can require both a minimum RSSI as well as minimum autocorrelation output before triggering the PHY to start.
- * Changed the precision of the energy_thresh register in the packet detection subsystem. Was UFix14_8 and is now UFix14_4
-  * Correspondingly, the default boot value of 150 (0.5859 in UFix14_18) is now 9 (0.5626 in UFix14_4)
+ * Reduced Rx PHY RSSI averaging to 4 samples (from 8) for faster Rx power estimates. RSSI averaging in the AGC is unchanged.
+ * Added new packet detection logic that can require a minimum RSSI for all detections (can be used to realize configurable Rx sensitivity - disabled by default)
+ * Changed the precision of the energy_thresh register in the auto correlation packet detector (now UFix14_4, was UFix14_8)
+  * Correspondingly, the default energy_thresh is now 9 (0.5626 in UFix14_4) vs 150 (0.5859 in UFix14_18) is previous releases
 
 '''MAC Software Changes:'''
-  * In addition to a signed 8-bit value for Rx power, the mpdu_info struct created by CPU_LOW now also contains the raw RSSI used in the calculation of Rx power
+  * Added 16-bit averaged RSSI value to rx_frame_info; this supplements the existing 8-bit Rx power estimate derived from the averaged RSSI
   * Fixed a capitalization issue in a few includes that would cause errors on case-sensitive filesystems
   * Raised default Tx power in all top-level projects to 15 dBm (previously 13 dBm)
-  * Added a calibration value to the IPC_MBOX_SET_TIME mailbox command to account for the fact that it takes time to set the time.
-  * Completely refactored Rx power calculation function based on lookup tables.
-  * New Tx power-to-gain mapping function from characterization campaign
+  * Added a calibration value to the IPC_MBOX_SET_TIME mailbox command to account for latency in executing the command iteself
+  * Replaced RSSI-to-Rx-power calculation with lookup table derived from Rx power calibration experiments
+  * Replaced Tx-power-to-Tx-VGA-gain mapping function with lookup table derived from Tx power calibration experiments
 
 '''wlan_exp Framework Changes:'''
-  * Fixed a bug in the retrieval of promiscuous statistics. Previously, the only way to retrieve these promiscuous statistics was to retrieve all of them. The wlan_exp framework will now honor an optionally-supplied MAC address specifying a particular promiscuous stat struct that you want to retrieve.
-  * Fixed an IBSS issue where Tx parameters (e.g. rate) would be ignored for stations that had not yet populated the station_info list at the IBSS node.
+  * Fixed {{{node.stats_get_txrx}}} method to accept MAC address for un-associated device, allowing retrieval of promiscuous Tx/Rx stats for specific addresses
+  * Fixed an IBSS issue where Tx parameters (e.g. rate) would be ignored for stations that had not yet been added the station_info list at the IBSS node.
 
 '''Other Changes:'''
- * Added new [wiki:802.11/Benchmarks/Tx_Char Tx] and [wiki:802.11/Benchmarks/Rx_Char Rx] Characterizations. We're pleased to report that the Mango 802.11 Reference Design's transmitter and receiver exceed the requirements specified in the 802.11 standard.
+ * Added new [wiki:802.11/Benchmarks/Tx_Char Tx] and [wiki:802.11/Benchmarks/Rx_Char Rx] Characterizations. We're pleased to report that the Mango 802.11 Reference Design's transmitter and receiver exceed the Tx modulation accuracy and Rx sensitivity requirements in the 802.11a/g standard.
+
+----
 
 == 1.0 Release ==