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802.11 Test Monitoring

 

WiLANTA LVSG11b/g/Overview


Signal sources are needed in R&D (or Production) for testing RF modules to evaluate basic WLAN Receiver functionality or when new designs are being evolved. Engineers now have a highly precise and flexible signal generation tool WiLANTA – LVSG11b/g with the required performance for rapid testing using signals compliant to the standard specifications.

WiLANTA – LVSG11b/g Feature Highlights:

Supported frequency range - 2.4 GHz band
Supported Data Rate - 1,2,5.5,6,9,11,12,18,22,24,33,36,48,54 Mbps
High modulation accuracy
Supports all possible modulation formats and techniques of 802.11b/g
Fully-coded 802.11b/g WLAN PHY frames enable FER, PER, and BER for testing receiver sensitivity
User defined, predefined, text and PRBS data generator
Scrambler on/off control
Capable for generating 802.11b/g signals for R&D and production testing of WLAN receivers
Signals contain the necessary PHY information and frame structures to test WLAN receivers
 

Screenshots

WLAN OFDM Transmitter
I/Q view allows you to view complex components of the signal without changing settings or measurements.

Overview

WiLANTA- LabVIEW is a comprehensive IEEE 802.11b/g standards specific, RF and Baseband measurement, testing and analysis tool for overall PHY layer performance of WLAN Transmitters and Receivers using National Instruments. WiLANTA offers an extensive range of preprogrammed test, analysis and measurement features. The WiLANTA suite comprises of a WiLANTA – Signal Generator LVSG11b/g and WiLANTA - Signal Analyzer LVSA11bg.

WiLANTA Signal Generator LVSG11b/g is capable of generating 802.11b and 802.11g PHY Baseband data and seamlessly integrates with NI-PXI-5670 RFSG to generate RF test signals for transmission in the 2.4 GHz band (802.11b/g).WiLANTA Signal Generator LVSG11b/g is an essential tool for testing DUT’s Receiver performance characteristics like Receiver sensitivity, Jamming Resistance, PER, BER.

WiLANTA LVSG11b/g allows to model or add impairments like
Channel (AWGN/Fading)
Freq Offset Addition and/or correction
I/Q Gain Imbalance
Phase Noise
Memoryless Nonlinearity
Quadrature Skew
DC offset
Power Amplifier Backoff

The designers can analyze the above impairments on receiver side with the help of a powerful signal analyzer tool – WiLANTA LVSA11bg
 
WLAN standards supported 802.11b and 802.11g
Framing Burst framed data includes preamble and header fields
Modulation Formats DSSS, OFDM, CCK, PBCC
Modulation Techniques DBPSK, DQPSK, BPSK, QPSK, 8-PSK, 16-QAM, 64-QAM
Data source PRBS sequence, User-defined and text messages
Payload data length Maximum: 2346 bytes / Minimum: 1 byte
Encoding rates 1/2, 2/3, 3/4
Baseband filtering None, root cosine
Windowing for OFDM modes Time-domain windowing for each OFDM symbol
Scrambler On, off
Service field 0 to FFFF Hex (16 bits: First 7 LSB are masked to 0)
Scrambler seed initialization value OFDM: Random. All other modulation schemes – as specified in respective standards.
 
 

Signal Generation Setup for WLAN Receiver testing


 

System Requirements

System Memory: Minimum 512 MB, recommended 1GB
Disk Space: 100 MB
OS: Windows 2000/NT/XP
NI-PXI 5670 RF Signal Generator
Drivers : NI PXI RFSG 5670 Ver 1.1
 

WiLANTA Signal Generator LVSG11b/g Advantage

Generates accurate data which helps the designers to test Receiver performance with ease
Easy to use GUI
Designers can move quickly from simulation domain to generation of real world 802.11b/g systems
Verification of chip designs
WiLANTA users have the flexibility of adding impairments at the transmitter end i.e., during signal generation or at the receiver side during signal analysis
The vendors can make use of WiLANTA Signal Generator LVSG11bg to ensure interoperability between WLAN (802.11b/g) products from different vendors & measure performance
Seamless integration with NI PXI 5670 R FSG