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WiPAN LVCT - WPAN
802.15.4 PHY layer Compliance Testing/Overview |
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The IEEE 802.15.4
standard, ratified in May 2003, for wireless personal area
networks (WPANs) specifies the physical (PHY) and medium access
control (MAC) layers, while the ZigBee Alliance defines the
network, security and application profile layers for an IEEE
802.15.4-based system.
WiPAN LVCT - Compliance testing tool - a LabView-based
design tool enables WPAN vendors and manufacturers to simplify
compliance testing and pre-certify products prior to submission
for ZigBee interoperability testing. It assures system integrators
to buy products from different manufacturers with confidence that
the products will work together. It’s the right tool for
Designers, Testers, R&D Engineers engaged in Wireless PAN (2.4
GHz) Compliance test activity. |
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WiPAN LVCT
FEATURES |
 Supported data rate 250 kbps
Supported Chip rate – 2000
kchip/s
Symbol rate – 62.5 ksymbol/s
16ary quasy-orthogonal
modulation technique - QPSK modulation Scheme
Extremely User Friendly
Interface and all the tests can be performed with Ease
Offers Maximum flexibility in
selecting the test (any one of the 14 tests) and the channel for
transmission (any one of the 16 channels)
No of octets of various data
patterns such as PN seq, text, user defined pattern and pre designed
patterns for transmission purpose can be easily selected from the
drop down menu.
It provides high accuracy to
measure IEEE 802.15.4 (2.4 GHz) signals.
Seamless integration with NI
PXI 5660 and NI PXI 5670 vector signal analyzer and vector signal
generator
Tests IEEE 802.15.4(2.4 GHz)
WPAN of any vendor.
Self Explanatory Results –
with less effort.
Requires minimum time to run
the tests.
Minimum user interaction with
hardware and requires minimum knowledge prior to use.
WiPAN LVCT enables faster
validation cycles with pass-fail testing over a comprehensive range of
tests
for Transmitters and Receivers
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OVERVIEW |
WiPAN LVCT tool is a
single button, highly accurate software which tests any WPAN(DUT) to
meet the latest emerging wireless standard IEEE 802.15.4 in the 2.4
GHz PHY unlicensed Industrial Scientific Medical (ISM) band. It
performs 10 tests (refer table) as per the IEEE 802.15.4(2.4 GHz)
Specification on any one of the 16 frequency channels numbered 11 to
26 which are 5 MHz apart from each other. Compliance testing is
conducted to assure compliance to specification of the device under
test in a Wireless Network Environment. The WiPAN LVCT suite comprises
of WiPAN LVSA - signal analyzer and WiPAN LVSG - signal generation
software.
WiPAN LVSG is Baseband PHY software in labview that provides a
configurable MAC, basic transmitter blocks such as bit to chip
formation, Offset Quadrature Phase Shift Keying (O-QPSK) modulation
(16-ary) and half sine pulse shaping as per the requirements of the
Standard. Chip modulation is OQPK at 2.0 Mchips/s.
WiPAN LVSA is Baseband PHY receiver software in labview for
capturing signals in the 2.4 GHz band. It’s a WPAN receiver capable of
performing symbol synchronization, frequency synchronization and
neutralizing front end non idealities. The receiver also performs EVM
calculation as per standard specifications.
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Compliance
Tests |
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Sl. No. |
Test * |
NI-RFSA +
(NI-PXI-5660) |
NI-RFSG +
(NI-PXI-5670) |
| 1 |
Spectrum PSD Mask |
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2 |
Error Vector Magnitude |
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| 3 |
Transmit Center Frequency Tolerance [a] |
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4 |
Maximum Transmit Power |
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| 5 |
Symbol Rate |
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6 |
Maximum Input Power [b] |
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| 7 |
Receiver Sensitivity [b] |
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8 |
Adjacent Channel Jamming Resistance
[c] |
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| 9 |
Alternate Channel Jamming Resistance [d] |
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10 |
Rx-Tx Turnaround Time |
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* Reference to IEEE 802.15.4 - 2003
[a] Requires the transmitter to transmit unmodulated
carrier.
[b] Requires the DUT to provide a PER software, which decides
the outcome of the test.
[c] [d] Requires 2 transmitter devices, one to transmit in
desired channel and the other to transmit in adjacent/alternate
channel(s).
+ Vector Signal Generator and Analyzer
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System
Requirements |
System Memory: Minimum 512
MB; recommended 1GB
Disk Space: 100 MB
OS: Windows 2000/NT/XP
Drivers : NI PXI RFSG 5670
Ver 1.1
Drivers : NI PXI RFSA 5660
Ver 1.5
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WiPAN LVCT
Advantage |
Precertify products prior to
submission to a certified ZigBee interoperability test house
WPAN equipment designers now,
for the first time, have the tool they need to ensure their product's
compliance to IEEE 802.15.4 (2.4 GHz)
Broad range capabilities to
characterize overall PHY layer performance of WPAN Transmitters and
Receivers.
WPAN Equipment manufacturers
can take advantage of WiPAN LVCT to ensure reliable interoperability
between WPAN products from different vendors.
Researchers and Students can
carry their research on IEEE 802.15.4(2.4 GHz) WPAN with ease and come
out with best results
WPAN Chip manufacturers can
verify their chips for compliance to IEEE 802.15.4 (2.4 GHz) Standard.
Certifying Labs can test and
certify WPAN chips from various manufacturers and benchmark their
performance
IP vendors can validate their
WPAN IP for market acceptance.
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