17-03-2014, 01:08 PM
Transmit and Receive Supported Data Rates
Purpose:
To verify that the device under test (DUT) can operate at all defined mandatory data
rates, and any optional supported data rates.
Resource Requirements:
• Vector Signal Analyzer (VSA), Rohde & Schwarz FSQ26 or equivalent
• ERP access point/station with external antenna jack
• Associated ERP AP or station with external antenna jack (optional)
• RF Power Splitter , Picosecond 5333 or equivalent
• Controlling Software (Matlab)
Last updated: June 2007
Discussion:
Reference [1]describes the physical layer convergence procedure (PLCP) for Extended Rate
PHYs (ERP) operating in the 2.4 GHz band. Subclause 19.3.2 requires that all ERP stations
support three different preamble and header formats. To provide interoperability with legacy
stations that use direct sequence spread spectrum (DSSS) and complementary code keying
(CCK) modulation, an ERP device must support 1, 2, 5.5, and 11 Mbps data rates conforming to
the Long Preamble and header format described in 19.3.2.1. Likewise, support for the Short
Preamble described in 19.3.2.2 is also mandatory which includes data rates of 2, 5.5, and 11
Mbps. The third is the ERP orthogonal frequency division multiplexing (ERP-OFDM) preamble
and header specified in 19.3.2.3 providing 6, 12, and 24 Mbps data rates.
Procedure:
1. Configure the DUT to operate at a data rate of 1 Mbps.
2. Configure the associated AP/STA to operate at a date rate of 1 Mbps. Transmit ICMP
echo request packets to the DUT.
3. Configure the VSA to capture an entire packet. Demodulate and decode the frame.
4. Verify that the DUT is able to transmit and received frames at the configured data rate.
5. Repeat steps 1-4 for all mandatory data rates.
6. Repeat steps 1-4 for all optional data rates supported by the DUT.
Observable Results:
a. The DUT should be capable of transmission and reception at 1, 2, 5.5, 6, 11, 12, and 24
Mbps data rates.
b. The DUT should be capable of transmission and reception at all supported optional data
rates.