Available Features (802.11a/g/j/p OFDM)

The following features are available with 802.11a/g/j/p OFDMOrthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. Demodulation:

• Standard OFDM demodulation presets:
  • IEEEInstitute of Electrical and Electronics Engineers. A US-based membership organisation that includes engineers, scientists, and students in electronics and related fields. The IEEE developed the 802 series wired and wireless LANLocal Area Network: A communications network that serves users within a local geographical area, typically over distances of around 100m. Wireless LANs use wireless communicaitons to network devices so there is no need for data cabling. standards. Visit the IEEE at http://www.ieee.org 802.11a-1999
  • HIPERLAN/2
  • IEEE 802.11g DSSSDirect sequence spread spectrum. The data transmission scheme (sometimes referred to as a "'modulation" scheme) used in 802.11b WLANs. DSSS uses a radio transmitter operating at a fixed centre frequency, but using a relatively broad range of frequencies, to spread data transmissions over a fixed range of the frequency band. 802.11a and 802.11g (when not operating in 802.11b mode) use Orthogonal Frequency Division Multiplexing (OFDM).-OFDM
  • 802.11a/g Turbo Mode
  • IEEE 802.11p DSRC
  • IEEE 802.11j 10 MHzMegahertz: A unit of frequency equal to one million hertz or cycles per second.
• Variable carrier spacing (default 312.5 kHzkiloHertz: A radio frequency measurement (one kilohertz = one thousand cycles per second).)
• Pulse Search
• IQ Meas constellation measurement data
• Equalizer response measurement data
• Common Pilot Error measurement data
• Enhanced Error Vector trace data display
• Mirrored (flipped) frequency spectrums used to remove the effects of high-side mixing or complex conjugation mismatches in simulated data.
• Measurement offset and interval (similar to time gating) used to select specific data segments for analysis
• Averaging is applicable only in the following circumstances:
  • Multi-burst averaging is available for OFDM RMS Error Vector Spectrum, OFDM Eq Channel Frequency Response, pre-demod Spectrum, and the numeric Error Summary part of OFDM Sym/Errs trace data
  • The following averaging types are available:
    • RMS (video)
    • RMS Exponential
    • Peak Hold/Continuous Peak Hold
• Time gating is not available (does offer measurement offset/interval feature)
• By-pass 802.11g CCKcomplementary code keying preamble to demodulate the 802.11a data payload.
• CCDF of the OFDM burst
• Preamble Freq Error result

These features are available with Digital Demod but not available for 802.11a/g/j/p OFDM Demodulation:

• Measurement\Reference filter
• Sync search
• IQ Mag error and IQ Phase error trace data

See Also

Available Trace Data (802.11a/g/j/p OFDM)

About 802.11a/g/j/p OFDM Modulation Analysis

About Averaging