User Manual

Wireless 11n USB Adapter
802.11b - The 802.11b standard specifies a wireless product networking at 11 Mbps using
sequence spread-spectrum (DSSS) technology and operating in the unlicensed radio
re also referred to
-Fi networks.
cation for wireless networking at 54 Mbps using direct-sequence
d-spectrum (DSSS) technology, using OFDM modulation and operating in the unlicensed
4GHz, and backward compatibility with IEEE 802.11b devices, and WEP
urity.
ilds upon previous 802.11 standards by adding MIMO (multiple-input
uses multiple transmitter and 3receiver antennas to allow for increased
atial multiplexing and increased range by exploiting the spatial diversity,
gh coding schemes like Alamouti coding. The Enhanced Wireless Consortium
lp accelerate the IEEE 802.11n development process and promote a
or interoperability of next-generation wireless local area networking
k - An ad-hoc network is a group of computers, each with a Wireless Adapter,
nt 802.11 wireless LAN. Ad-hoc wireless computers operate on a
ctly with each other without the use of an access point.
o referred to as an Independent Basic Service Set (IBSS) or as
ode, and is useful at a departmental scale or SOHO operation.
quence Spread Spectrum) - DSSS generates a redundant bit pattern for all
bit pattern is called a chip (or chipping code). Even if one or more bits in
e damaged during transmission, statistical techniques embedded in the receiver can
the need of retransmission. To an unintended receiver, DSSS
noise and is rejected (ignored) by most narrowband receivers.
ver, to an intended receiver (i.e. another wireless LAN endpoint), the DSSS signal is
nterference is inherently rejected (ignored).
ad Spectrum) - FHSS continuously changes (hops) the
frequency of a conventional carrier several times per second according to a
channels. Because a fixed frequency is not used, and only the
transmitter and receiver know the hop patterns, interception of FHSS is extremely difficult.
 Infrastructure Network - An infrastructure network is a group of computers or other devices,
each with a Wireless Adapter, connected as an 802.11 wireless LAN. In infrastructure mode,
the wireless devices communicate with each other and to a wired network by first going
through an access point. An infrastructure wireless network connected to a wired network is
referred to as a Basic Service Set (BSS). A set of two or more BSS in a single network is
Appendix B: Glossary

direct-
spectrum at 2.4GHz, and WEP encryption for security. 802.11b networks a
as Wi
 802.11g - specifi
sprea
radio spectrum at 2.
encryption for sec
 802.11n - 802.11n bu
multiple-output). MIMO
data throughput via sp
perhaps throu
(EWC)3 was formed to he
technology specification f
(WLAN) products.
 Ad-hoc Networ
connected as an independe
peer-to-peer basis, communicating dire
Ad-hoc mode is als
peer-to-peer m
 DSSS - (Direct-Se
data transmitted. This
the chip ar
recover the original data without
appears as low power wideband
Howe
recognized as the only valid signal, and i
 FHSS - (Frequency Hopping Spre
carrier
pseudo-random set of
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