DSSS/CCK DSSSB DSSSC DSSSL DSSSM DSSSMA DSSSP DSSSS DSST DSSU DSSV DSSVS DSSW DSSYS DST DSTA DSTAC DSTAG DSTAIR DStan DSTAR DSTATCOM DSTATS DSTB DSTBC DSTBE DSTC DSTCA DSTD DSTDP DSTE DSTEL DSTF DSTFS DSTFT DSTG DSTI
A New Scheme for Spreading & De-spreading in the Direct Sequence Spread Spectrum Mechanism The autocorrelation function of the DSSS sequence contains only one peak and the main peak of the DSSS sequence is wider than the peak of the BOC sequence. A Detection Algorithm for the BOC Signal Based...
There is no proof, however, that these low power wireless devices are absolutely safe. Low power Wireless devices emit low levels of radio frequency energy (RF) in the microwave range while being used. Whereas high levels of RF can produce health effects (by heating tissue), exposure of low...
Zigbee Wireless Network Topology Network topology is fundamental to communication networks, dictating the arrangement and interconnection of links and nodes. In the context of Zigbee, there are three main types of network topology: point-to-point topology, multi-point topology and mesh topology. Each...
802.11b(also referred to as 802.11 High Rate or Wi-Fi) an extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1-Mbps) in the 2.4 GHz band. 802.11b uses onlyDSSS. 802.11b was a 1999 ratification to the original 802.11 st...
Modulation Type:Dsss/Cck Bpsk/Qpsk Ofdm Bpsk/Qpsk/16-Qam/64-Qam; Data Rate:up to 82Mbps; Network Capability:9 Hops and No Less Than 64 Nodes; Encryption:AES; Usage:Computer; Type:Wired; Support Network:Ethernet; Information content:Data; ...
In many textbooks it is stated that DSSS is more robust than FHSS. Especially in terms of interference and delay spread? What is the exact reason. Lets say we multiply a given bit 1 with a larger bit sequence. How does this make the communication more immune against delay spr...
IEEE 802.11b- This wlan standard supports DSSS/CCK Physical layer. To know more read our article on 802.11b. IEEE 802.11g- This wlan standard supports both 11a and 11b and supports RF center frequencies of 2.4 GHz and 5 GHz. IEEE 802.11n - This wlan supports OFDM and also MIMO is ...
802.11b (1999)boosted speed to 11 Mbps using direct sequence spread spectrum (DSSS) in 2.4 GHz. It also accommodated weak signals by maintaining lower DSSS modes and emerged as the signature WLAN technology. 802.11a (1999)used an OFDM physical layer in the 5 GHz band to transmit up to 54...
3. OSI Reference Model Considerations In some standards, the OSI reference model layers are pertinent to their specifications. Some considerations on the security at each of these layers is discussed below. • Physical layer (PHY) refers to the actual media such as wireless, cable, ...