Linksys WUSB54GC manual What is DSSS? What is FHSS? And what are their differences?

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Compact Wireless-G USB Adapter

the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives, Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).

What is DSSS? What is FHSS? And what are their differences?

Frequency-Hopping Spread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical channel. To an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence Spread- Spectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers.

Would the information be intercepted while transmitting on air?

The Adapter features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum technology, it has the inherent security feature of scrambling. On the software side, the Adapter offers the encryption function (WEP) to enhance security and access control.

What is WEP?

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as described in the IEEE 802.11 standard.

Appendix A: Troubleshooting

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Frequently Asked Questions

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Contents 4802GHz.11gWireless-G How to Use this User Guide Copyright and TrademarksTable of Contents Compact Wireless-G USB Adapter List of Figures Front PanelMore Information Wireless Network Status 39 Leap Introduction WelcomeWhat’s in this Guide? Compact Wireless-G USB Adapter Planning your Wireless Network Network TopologyRoaming Planning your Wireless Network Network LayoutGetting to Know the Compact Wireless-G USB Adapter LED IndicatorsSetting up and Connecting the USB Adapter Starting the Setup WizardConnecting the Adapter Connecting the Adapter ScreenSetting Up the Adapter Available Wireless NetworkSetting Up the Adapter with SecureEasySetup SecureEasySetup Logo and LocationChanges, refer to Using the Wireless Network Monitor Setting Up the Adapter with Available Networks Encryption encoding data transmitted in a network12 PSK2 Needed for Connection Changes, refer to Using the Wireless Network Monitor Setting Up the Adapter with Manual Setup 15 Network Settings16 Wireless Mode WEP WPA Personal PSK2WPA Enterprise EAP-TLSRadius Leap 27 Confirm New Settings Using the Wireless Network Monitor Accessing the Wireless Network MonitorLink Information Screens Wireless Network Status Wireless Network Statistics SecureEasySetup SecureEasySetup ButtonSecureEasySetup is Complete Site Survey Site InformationProfiles Profile InformationCreating a New Profile 15 Export a Profile19 The SecureEasySetup Logo and Location 21 SecureEasySetup Complete 22 Available Wireless Network 25 PSK2 Needed for Connection 26 The Congratulations Screen 28 Network Settings 31 Wireless Security 32 Wireless Security WEP 33 Wireless Security WPA Personal 35 Wireless Security WPA Enterprise EAP-TLS 37 Wireless Security Radius EAP-TLS 39 Leap 41 The Congratulations Screen Appendix a Troubleshooting Common Problems and SolutionsFrequently Asked Questions What is the Ieee 802.11b standard?What is ad-hoc mode? What is DSSS? What is FHSS? And what are their differences? Appendix B Using Windows XP Wireless Configuration Figure B-1 Wireless Network Monitor IconFigure B-4 Available Wireless Network Figure B-6 Network Connection Wireless Security Appendix C Wireless Security Security PrecautionsSecurity Threats Facing Wireless Networks Appendix C Wireless Security Compact Wireless-G USB Adapter Appendix D Windows Help Shared ResourcesNetwork Neighborhood/My Network Places Appendix E Glossary Compact Wireless-G USB Adapter Compact Wireless-G USB Adapter Compact Wireless-G USB Adapter Compact Wireless-G USB Adapter Appendix F Warranty Information Limited WarrantyStandards Appendix G SpecificationsModel Dbpsk 1 Mbps 802.11g OfdmStorage Temp Operating HumidityStorage Humidity Appendix H Regulatory Information FCC StatementCompact Wireless-G USB Adapter Compact Wireless-G USB Adapter Compact Wireless-G USB Adapter Compact Wireless-G USB Adapter Dual-Band Wireless Access Point Appendix I Contact Information