Wireless N Adapter RNX-N250PCe User Manual
Glossary z 802.11b - The 802.11b standard specifies a wireless product networking at 11
Mbps using direct-sequence spread-spectrum (DSSS) technology and operating
in the unlicensed radio spectrum at 2.4GHz, and WEP encryption for security.
802.11b networks are also referred to as Wi-Fi networks.
z 802.11g - specification for wireless networking at 54 Mbps using direct-sequence
spread-spectrum (DSSS) technology, using OFDM modulation and operating in
the unlicensed radio spectrum at 2.4GHz, and backward compatibility with IEEE
802.11b devices, and WEP encryption for security.
z 802.11n - 802.11n builds upon previous 802.11 standards by adding MIMO
(multiple-input multiple-output). MIMO uses multiple transmitter and receiver
antennas to allow for increased data throughput via spatial multiplexing and
increased range by exploiting the spatial diversity, perhaps through coding
schemes like Alamouti coding. The Enhanced Wireless Consortium (EWC) was
formed to help accelerate the IEEE 802.11n development process and promote a
technology specification for interoperability of next-generation wireless local area
networking (WLAN) products.
z Ad-hoc Network - An ad-hoc network is a group of computers, each with a
Wireless Adapter, connected as an independent 802.11 wireless LAN. Ad-hoc
wireless computers operate on a peer-to-peer basis, communicating directly with
each other without the use of an access point. Ad-hoc mode is also referred to as
an Independent Basic Service Set (IBSS) or as peer-to-peer mode, and is useful
at a departmental scale or SOHO operation.
z DSSS - (Direct-Sequence Spread Spectrum) - DSSS generates a redundant bit
pattern for all data transmitted. This bit pattern is called a chip (or chipping code).
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