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IEEE 802.16 BS + SS Signal Generator

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.
 

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
 

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.
 

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
 

IEEE 802.16 IQ Generator System requirements

Disk Space : 100 MB; RAM : 1GB
Windows 2000/XP
LabVIEW 7.1 or Runtime Engine 7.1
 

IEEE 802.16 IQ Generator Screenshots

CCDF
CCDF plot of Header and DL bursts
EVM/ Subcarrier
EVM plot to measure modulation accuracy and to check the modulators
IQ plot full
IQ plot of the complex 802.16 data with the TTG and RTG gaps