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IEEE 802.16 BS + SS
Signal Generator |
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IEEE 802.16-2004 standard
released in June 2004 specifies the air
interface of fixed broadband wireless access systems The
802.16-2004
standard describes four different air interfaces. One of these
interfaces is
optimized for non-line-of-sight, RF frequencies less than 11 GHz
and
distances up to 30 km. Although the standard has officially named
this
PHY layer as WirelessMAN-OFDM, many people refer to it as the
WiMAX
air interface. WiMAX stands for Worldwide Interoperability for
Microwave Access.
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IEEE 802.16
IQ Generator Features |
Supported modes
Uplink (SS) and Downlink (BS)
Modulation technique
OFDM 256
Duplex mode -TDD
Selectable Cyclic Prefix
8, 16, 32, 64
Saving Options
BS IQ .txt file
SS IQ .txt file (for all SSs
separately)
BS+SS combined IQ .txt file
Measurements
IQ Plots
CCDF Plots
Constellation Diagram
Power Spectrum Plot
Transmit Power Plot
Graphical utilities
User-defined plot color
User-defined style of lines
Zoom
Markers
Auto Scale for better viewing
of PSD & CCDF curves
Print data
Bandwidth range
1.25MHz to 20 Mhz in steps of
250 Khz
Modulation Formats
BPSK1/2, QPSK1/2, QPSK3/4,
16QAM ½, 16QAM 3/4, 64QAM 2/3, 64QAM3/4.
Frame duration
2.5/4/5/8/10/12.5/20 ms
Impairments supported
Memoryless Nonlinearity
AWGN (Additive White Gaussian
Noise)
SUI Channel models (1 to 6)
Phase noise
Quadrature skew
DC Offset
I/Q gain imbalance
Frequency Offset
Display parameters
Sampling Frequency
Raw data for Base Station and
Subscriber Stations
TTG/RTG duration
Physical slot duration
Sampling factor
Sub-carrier spacing
Number of PSs per Frame and
per Symbol
Guard Interval
Symbol Interval
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IEEE 802.16
IQ Generator Overview |
SeaMAX IQ Generator designed to create
IEEE 802.16-2004 compliant baseband signals. The software creates a
baseband I/Q waveform file based on the user-defined Base Station (BS)
and Subscriber Stations (SS) settings and saves the signal files in
.txt format on computer's local hard drive or any other specified
location.
SeaMAX IQ generator allows designers/engineers to accurately create
and save ideal or impaired BS, SSs and BS+SSs signal files in .txt
format. The generator provides functionality to create frames with DL
MAP, ULMAP, DCD, UCD with configured number of DL burst and subscriber
stations.
SeaMAX IQ generator provides an intuitive graphical user interface to
configure uplink and downlink waveforms, CP, BW and Frame length as
per standard specifications. To verify receiver robustness, SeaMAX IQ
generator provides various additive impairments which can be added to
the test signal and saved in .txt format.
These signal files can be downloaded to an AWG for RF/IF signal
generation or SeaMAX IQ/ Third party analyzer for analysis.
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IEEE 802.16
IQ Generator Advantages |
Validate WiMAX Receivers
Test power amplifiers and
modulators
Save the signal
configurations in .txt format
High modulation accuracy
Verification of chipset
designs
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IEEE 802.16
IQ Generator System requirements |
Disk Space : 100 MB; RAM :
1GB
Windows 2000/XP
LabVIEW 7.1 or Runtime Engine 7.1
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IEEE 802.16
IQ Generator Screenshots |
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CCDF
CCDF plot of Header and DL bursts |
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EVM/ Subcarrier
EVM plot to measure modulation accuracy and to check the
modulators |
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IQ plot full
IQ plot of the complex 802.16 data with the TTG and RTG gaps |
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