Changes between Version 6 and Version 7 of WARPLab/AGC

Timestamp:

Nov 9, 2015, 11:54:56 AM (8 years ago)

Author:

chunter

Comment:

--

WARPLab/AGC

@@ -23 +23 @@
 ||  [[Image(sts.png,width=800)]][[BR]]20 MHz STS Symbol  ||
 
-The above figure shows a single 20 MHz STS symbol for both a 20 MSPS system (as defined by the 802.11 standard) and a 40 MSPS system (e.g. WARPLab). When 2x oversampled in a 40 MSPS system, the STS itself is periodic in 32 samples, achieving the requirements for the DCO correction subsystem. The magnitude-squared ({{{I^2^ + Q^2^)}}}), however, is periodic in 16 samples. This achieves the requirements for the baseband gain refinement in the AGC.
+The above figure shows a single 20 MHz STS symbol for both a 20 MSPS system (as defined by the 802.11 standard) and a 40 MSPS system (e.g. WARPLab). When 2x oversampled in a 40 MSPS system, the STS itself is periodic in 32 samples, achieving the requirements for the DCO correction subsystem. The magnitude-squared (I^2^ + Q^2^), however, is periodic in 16 samples. This achieves the requirements for the baseband gain refinement in the AGC.
 
 Even though the AGC is tuned for a 20 MHz STS, it is important to note that this does not limit the overall WARPLab design from dealing with wider-bandwidth waveforms. Even the 40 MHz 802.11n standard still uses 20 MHz STS symbols by forming two valid 20 MHz preambles that on neighboring 20 MHz channels. Doing so still meets the periodicity requirements of the AGC and DCO correction subsystems.