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

The following features are available with 802.11a/g/j/p OFDM Orthogonal 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:
  • IEEE Institute 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 LAN standards. Visit the IEEE at http://www.ieee.org 802.11a-1999
  • HIPERLAN/2
  • IEEE 802.11g DSSS Direct 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 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second.
• Variable carrier spacing (default 312.5 kHz kiloHertz: 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 CCK complementary 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