Available Features (802.16 OFDMA)

The following features are available with 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 802.16 OFDMA modulation analysis:

• Standard IEEE 802.16 OFDMA modulation analysis

  • Ratified IEEE 802.16 OFDMA mode includes IEEE Std 802.16-2009.

  • Legacy PIEEE 802.16 OFDMA mode includes IEEE 802.16-2004, P802.16-2004/Cor1/D2, P802.16e/D7

• Downlink (base station) or Uplink (mobile subscriber terminal) analysis

• Single-button presets for 802.16e:10 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second., 802.16e:5 MHz, and TTA Telecommunications Technology Association (Korea): A telecommunications standards setting body in Korea.-Phase2 (WiBro)profiles

• Single zone multi-burst analysis or single-zone Uniform analysis

  • Downlink: PUSC partial usage of subchannels: Some of the subchannels are allocated to the transmitter. (single segment or using all subchannels; SISO or MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas.), FUSC full usage of subchannels: All of the subchannels are allocated to the transmitter., OFUSC, and AMC Adaptive Modulation and Coding zone types" After: "Burst Boosting level (Downlink)", add "Collaborative Spatial Multiplexing (Uplink)

  • Uplink: PUSC, OPUSC, and AMC zone types

• Standard BW values of 1.25, 3.5, 4.375, 5, 7, 8.75,10, 14, 15, 17.5, 20, 28 MHz (or user-defined)

• FFT Fast Fourier Transform: A mathematical operation performed on a time-domain signal to yield the individual spectral components that constitute the signal. See Spectrum. sizes 128, 512, 1024, and 2048

• User-defined parameter for: Guard Interval, Frame Length, Downlink Ratio

• Auto detected data modulation format: QPSK Quadrature phase shift keying, 16QAM, 64QAM; per-burst for data burst analysis; per symbol for Uniform analysis.

• Data Burst Info trace results including per-burst name, size, modulation format, power, RCE Relative Constellation Error is the RMS level of the Error Vector Magnitude, averaged over all subcarriers and all detected OFDM symbols., and DataRCE (burst analysis)

• RCE results including RCE (RMS and Peak), PilotRCE (RMS), DataRCE (RMS and Peak), and UnmodulatedRCE (RMS)

• IQ impairment results including IQ Offset (dB), Quadrature Error (deg), Gain Imbalance (dB), and I/Q Timing Skew (sec)

• RSSI Received signal strength indication (Downlink)

• Common pilot error (CPE)

• Frequency error

• Symbol clock error

• Time offset (frame start relative to trigger location)

• PRBS Pseudo-Random Binary Sequence status result with detailed feedback

• Equalizer response measurement data (absolute, and differential for channel flatness measurements, also impulse response data)

• Common Pilot Error measurement data

• Enhanced Error Vector trace data display (Spectrum and Time), includes per-burst marker annotation and unique data point color trace (burst analysis mode), and unique modulation format data point color trace (Uniform zone analysis mode).

• Enhanced IQ Meas constellation measurement data, includes per-burst marker annotation and data point coloring (burst analysis) and modulation format data point coloring (Uniform analysis)

• Preamble Frequency err (used to show frequency settling) (Downlink)

• CCDF Complementary Cumulative Distribution Function, Spectrum and Time traces of pre-demod waveform (user-selectable region)

• User interface for zone definition:

  • Automatic analysis of FCH and DL-MAP downlink map: A MAC message that defines burst start time for both time division multiplex and time division multiple access (TDMA) by a subscriber station (SS) on the downlink. burst types (Downlink)

  • Built-in handling of CDMA Code Division Multiple Access: One of several digital wireless transmission methods in which signals are encoded using a specific pseudo-random sequence, or code, to define a communication channel. A receiver, knowing the code, can use it to decode the received signal in the presence of other signals in the channel. This is one of several "spread spectrum" techniques, which allows multiple users to share the same radio frequency spectrum by assigning each active user an unique code. CDMA offers improved spectral efficiency over analog transmission in that it allows for greater frequency reuse. Other characteristics of CDMA systems reduce dropped calls, increase battery life and offer more secure transmission. See also IS-95. and PAPR peak to average power ratio: Peak-to-average power ratio is the ratio of the peak envelope power to the average envelope power of a signal during a given period of time. regions (Uplink)

  • Rectangular and Wrapped data burst definitions

  • Unlimited bursts may be defined per zone

  • Per-burst parameters include:

    • Type (FCH, DL Down Link (forward link: from base station to cell phone)-MAP, or Normal for Downlink; CDMA/PAPR region or Normal for Uplink)

    • Name (applied to trace annotation and data burst info results for easy identification)

    • Geometry (Wrapped or Rectangular entry with table-based user interface)

    • Data modulation format (or may be auto detected)

    • Burst Boosting level (Downlink)

• Map File import/export capabilities for efficient measurement setup sharing

  • From/to 89601A/B setup files

  • Individual zones from/to other Map Files

• Selectable pilot tracking (Amplitude, Phase, and Timing)

• Selectable channel estimation method (ChanEst sequence only(Downlink), pilot-aided, or data-aided)

• FDD Frequency Division Duplex: A duplex scheme in which uplink and downlink transmissions use different frequencies but are typically simultaneous., TDD Time Division Duplex: A duplexing technique dividing a radio channel in time to allow downlink operation during part of the frame period and uplink operation in the remainder of the frame period. and H-FDD modes (including continuous transmission, with external triggering)

• 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 symbols within the analysis zone

• Subcarrier offset and interval subset selection (for Uniform analysis) to select specific frequency regions for analysis

• Averaging is applicable only in the following circumstances:

  • Multi-measurement averaging is available for OFDMA RMS Error Vector Spectrum trace data

  • Multi-measurement averaging is available for Equalizer Channel Frequency response traces data (absolute and differential channel flatness)

  • The following averaging types are available for the numeric error summary data and for the pre-demodulated spectrum trace data:

    • RMS (video)

    • RMS Exponential

    • Peak Hold/Continuous Peak Hold