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"Direct Sequence Spread Spectrum (DSSS)
DSSS multiplies the data bits by a very fast pseudo-random bit pattern (PN sequence) that "spreads" the data into a large coded stream that takes the full bandwidth of the channel. DSSS is the basis for CDMA cellphones and 802.11 Wi-Fi wireless transmission. For a technical example of DSSS technology, see cdma.
Frequency Hopping Spread Spectrum (FHSS)
FHSS continuously changes the center frequency of a conventional carrier several times per second according to a pseudo-random set of channels, while chirp spread spectrum changes the carrier frequency. Because a fixed frequency is not used, illegal monitoring of spread spectrum signals is extremely difficult, if not downright impossible depending on the particular method. FHSS is the transmission technology in Bluetooth. See integrated-business-systems-and-services-inc, wifiand bluetooth."
From spread-spectrum
What else can I help you with?
What is full form of DSSS?
Direct-Sequencing Spread Spectrum
What are the Four primary technologies in which wireless lans uses in transmitting and receiving data?
a. Direct sequence spread spectrum (DSSS). b. Frequency hopping spread spectrum (FHSS). c. Infrared d. Orthogonal frequency division multiplexing(OFDM)
Spread spectrum techniques fhss and dsss?
"Direct Sequence Spread Spectrum (DSSS)DSSS multiplies the data bits by a very fast pseudo-random bit pattern (PN sequence) that "spreads" the data into a large coded stream that takes the full bandwidth of the channel. DSSS is the basis for CDMA cellphones and 802.11 Wi-Fi wireless transmission. For a technical example of DSSS technology, see cdma.Frequency Hopping Spread Spectrum (FHSS)FHSS continuously changes the center frequency of a conventional carrier several times per second according to a pseudo-random set of channels, while chirp spread spectrum changes the carrier frequency. Because a fixed frequency is not used, illegal monitoring of spread spectrum signals is extremely difficult, if not downright impossible depending on the particular method. FHSS is the transmission technology in Bluetooth. See integrated-business-systems-and-services-inc, wifiand bluetooth."From spread-spectrum
What is DSSS Methodology?
Direct Sequence Spread Spectrum It's one of the many protocols for transmitting data over a wire (or other medium)
What is the frequency spectrum for the DSSS channels in 802.11b wireless networking?
In 802.11b wireless networking, Direct Sequence Spread Spectrum (DSSS) operates primarily in the 2.4 GHz ISM band, specifically between 2.400 GHz and 2.4835 GHz. This standard utilizes multiple channels, typically spaced 5 MHz apart, with a total of 11 channels available in North America. DSSS spreads the data signal over a wider bandwidth by multiplying it with a pseudo-random noise code, which increases resistance to interference and improves security. The resulting frequency spectrum allows for robust communication, even in environments with potential signal degradation.
What is Complementary Code Keying?
Complementary Code Keying (CCK) is a modulation technique used in wireless communication systems, particularly in the context of spread spectrum technologies like those used in Wi-Fi. It encodes data by using pairs of complementary codes, which helps improve resistance to interference and enhances signal robustness. CCK allows for higher data rates compared to traditional techniques like Direct Sequence Spread Spectrum (DSSS) while maintaining efficient bandwidth usage. This method is instrumental in achieving reliable communication in environments with varying signal conditions.
How can dsss benefits from multipath propagation?
It can't, Prof. Schiller is wrong In contrary DSSS is more vulnerable to multipathing than e.g. FHSS is since it could just ignore its own shadows after jumping.
What encoding or modulation technology does 802.11 use?
FHSS- Which has been dropped recently DSSS- which is still used by access points to advertise themselves
How wide is each channel on an 802.11b-compliant DSSS system?
22 MHz Each channel is a contiguous band of frequencies 22 MHz wide
What other word does roald dahl use that means knowledgeable experts?
Roald Dahl uses the word "cognoscenti" to refer to knowledgeable experts in his writing.
An 802.11b compliant wirelesss lan configuration using DSSS can have a maximum of how many non-overlapping co-located access points?
A maximum of three co-located direct sequence system are possible because channels 1, 6, and 11 are the only theoretically nonoverlapping channels.
How does TPSs and DSSs differ?
TPS (Transaction Processing System) is used to process routine transactions such as recording sales or updating inventory in real-time. DSS (Decision Support System) is used to analyze data and provide information to support decision-making by managers. While TPS focuses on operational efficiency, DSS focuses on enhancing managerial effectiveness.
