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... Serial and Parallel Transmission Digital data transmission can occur in two basic modes: serial or parallel. Data within a computer system is transmitted via parallel mode on buses with the width of the parallel bus matched to the word size of the computer system. Data between computer systems is us ...
... Serial and Parallel Transmission Digital data transmission can occur in two basic modes: serial or parallel. Data within a computer system is transmitted via parallel mode on buses with the width of the parallel bus matched to the word size of the computer system. Data between computer systems is us ...
Modeling Signal Attenuation in IEEE 802.11 Wireless LANs
... and around a standard office environment. This model has been chosen for its simplicity and its effectiveness at modeling signal propagation over several frequencies [10, 9]. Our effort differs from previously published ones in several ways: No spatial averaging. It is common practice to represent a ...
... and around a standard office environment. This model has been chosen for its simplicity and its effectiveness at modeling signal propagation over several frequencies [10, 9]. Our effort differs from previously published ones in several ways: No spatial averaging. It is common practice to represent a ...
Introduction to a Network Application Project
... single tone not useful in data communications to make signals that can carry information, we have to add several different sine waves (composite signals) ...
... single tone not useful in data communications to make signals that can carry information, we have to add several different sine waves (composite signals) ...
CQ24604607
... four laser sources is fed into the combiner (multiplexer) to form a dense WDM multi-frequency light source. The output of the multiplexer is fed into the input of modulator. Another input to the modulator is the data signal from PRBS generator. This generator generates the logical signal and this lo ...
... four laser sources is fed into the combiner (multiplexer) to form a dense WDM multi-frequency light source. The output of the multiplexer is fed into the input of modulator. Another input to the modulator is the data signal from PRBS generator. This generator generates the logical signal and this lo ...
Lecture2: Physical and data link layer
... layer technology (e.g., , 10 Mbps Ethernet to 100 Mbps, but still want to maintain the same efficiency, ...
... layer technology (e.g., , 10 Mbps Ethernet to 100 Mbps, but still want to maintain the same efficiency, ...
GSM Overview
... It has been introduced from the year 1992. It uses digital radio transmis-sion for traffic. The 2G networks have much higher capacity than the first-generation systems. GSM is by far the most successful and widely used 2G system. Data rate supported : 9.6kbps to 14.4 kbps It uses Circuit s ...
... It has been introduced from the year 1992. It uses digital radio transmis-sion for traffic. The 2G networks have much higher capacity than the first-generation systems. GSM is by far the most successful and widely used 2G system. Data rate supported : 9.6kbps to 14.4 kbps It uses Circuit s ...
MANET Address Autoconf
... Every WLAN subnet is IPv6 network. Mobile router can connect to the IPv4 Internet through CDMA interface. ...
... Every WLAN subnet is IPv6 network. Mobile router can connect to the IPv4 Internet through CDMA interface. ...
Slide 1
... In the year 2004 revenue from wireless data was $34B, and by the year 2010 the number of wireless data subscribers will hit 1B!! ...
... In the year 2004 revenue from wireless data was $34B, and by the year 2010 the number of wireless data subscribers will hit 1B!! ...
Introduction to Wireless Communications & Networks
... is very important for performance, e.g., in Stopand-Wait, when reaction time is small (i.e., the ACK will arrive soon) the performance is very good, however, if reaction time is large, then performance is very bad. Therefore, proceed the transmission without waiting for ACK and deal with collision ...
... is very important for performance, e.g., in Stopand-Wait, when reaction time is small (i.e., the ACK will arrive soon) the performance is very good, however, if reaction time is large, then performance is very bad. Therefore, proceed the transmission without waiting for ACK and deal with collision ...
Multiple Access Links and Protocols
... CDMA (Code Division Multiple Access): exploits spread spectrum (DS or FH) encoding scheme unique “code” assigned to each user; ie, code set partitioning Used mostly in wireless broadcast channels (cellular, satellite,etc) All users share the same frequency, but each user has own “chipping” s ...
... CDMA (Code Division Multiple Access): exploits spread spectrum (DS or FH) encoding scheme unique “code” assigned to each user; ie, code set partitioning Used mostly in wireless broadcast channels (cellular, satellite,etc) All users share the same frequency, but each user has own “chipping” s ...
Document
... “Mr.Watson- Come here- I want to see you.” (Adapted from Bell’s personal notes at http://memory.loc.gov/mss/magbell/253/25300201/0022.jpg) If you were Bell, what would you say? In the recent 100 years, the development of telephone communication has progressed greatly. The communication methods used ...
... “Mr.Watson- Come here- I want to see you.” (Adapted from Bell’s personal notes at http://memory.loc.gov/mss/magbell/253/25300201/0022.jpg) If you were Bell, what would you say? In the recent 100 years, the development of telephone communication has progressed greatly. The communication methods used ...
Broadcast Channels
... • Interference cancellation – decode strongest signal first; subtract it from the remaining signals – repeat cancellation process on remaining signals – works best when signals received at very different power levels • Optimal multiuser detector (Verdu Algorithm) – cancels interference between users ...
... • Interference cancellation – decode strongest signal first; subtract it from the remaining signals – repeat cancellation process on remaining signals – works best when signals received at very different power levels • Optimal multiuser detector (Verdu Algorithm) – cancels interference between users ...
Measuring the In-Band Signal-to-Noice Ratio within Narrow Optical
... optical signal (or that portion of it being measured) is fully polarized and that the noise is unpolarized. It is thus still significantly hindered by moderately high PMD values, particularly for new-generation high-bit-rate signals transmitted through narrow DWDM channels. In addition, an accurate ...
... optical signal (or that portion of it being measured) is fully polarized and that the noise is unpolarized. It is thus still significantly hindered by moderately high PMD values, particularly for new-generation high-bit-rate signals transmitted through narrow DWDM channels. In addition, an accurate ...
Spatial Throughput Of Multi-Hop Wireless Networks Under
... ACK/NACK feedback signaling channel is error-free and delayfree. ...
... ACK/NACK feedback signaling channel is error-free and delayfree. ...
link-mac - Zoo
... Used mostly in wireless broadcast channels (cellular, satellite, etc) Unique “code” assigned to each user; i.e., code set partitioning All users share same frequency, but each user m has its own “chipping” sequence (i.e., code) cm to encode data • e.g. cm = 1 1 1 -1 1 -1 -1 -1 ...
... Used mostly in wireless broadcast channels (cellular, satellite, etc) Unique “code” assigned to each user; i.e., code set partitioning All users share same frequency, but each user m has its own “chipping” sequence (i.e., code) cm to encode data • e.g. cm = 1 1 1 -1 1 -1 -1 -1 ...
ppt
... • Very common on serial lines, in editors, etc. • Mark frames with special bit sequence • must ensure data containing this sequence can be transmitted • example: suppose 11111111 is a special sequence. • transmitter inserts a 0 when this appears in the data: ...
... • Very common on serial lines, in editors, etc. • Mark frames with special bit sequence • must ensure data containing this sequence can be transmitted • example: suppose 11111111 is a special sequence. • transmitter inserts a 0 when this appears in the data: ...
Wireless Mesh Network (WMN)
... – size vs. performance, routing protocol • 802.11 share BW – multiple access techniques • TDMA – synchronization • CDMA - code control • CSMA/CA ...
... – size vs. performance, routing protocol • 802.11 share BW – multiple access techniques • TDMA – synchronization • CDMA - code control • CSMA/CA ...
SS7 Signal Units
... LSSUs communicate information about the signaling link between the nodes on either end of the link. This information is contained in the status field of the signal unit. (See Figure 4-4.) They signal the initiation of link alignment, quality of received traffic, and status of processors at either en ...
... LSSUs communicate information about the signaling link between the nodes on either end of the link. This information is contained in the status field of the signal unit. (See Figure 4-4.) They signal the initiation of link alignment, quality of received traffic, and status of processors at either en ...
ppt - Universitatea Politehnica Timisoara
... • EDGE – Extension of GPRS giving approximately 3 times the throughput • CDMA – Assign codes to cells • UMTS and EDGE – variable data rates – dynamic allocation of resources ...
... • EDGE – Extension of GPRS giving approximately 3 times the throughput • CDMA – Assign codes to cells • UMTS and EDGE – variable data rates – dynamic allocation of resources ...
Light Fidelity (Li-Fi): Towards All
... than the entire RF spectrum up to 30 GHz, including the mmWave spectrum. Optical radiation, in general, does not interfere with other radio waves or with the operation of sensitive electronic equipment. Therefore, it is ideal for providing wireless coverage in areas which are sensitive to electromag ...
... than the entire RF spectrum up to 30 GHz, including the mmWave spectrum. Optical radiation, in general, does not interfere with other radio waves or with the operation of sensitive electronic equipment. Therefore, it is ideal for providing wireless coverage in areas which are sensitive to electromag ...
ppt
... • EDGE – Extension of GPRS giving approximately 3 times the throughput • CDMA – Assign codes to cells • UMTS and EDGE – variable data rates – dynamic allocation of resources ...
... • EDGE – Extension of GPRS giving approximately 3 times the throughput • CDMA – Assign codes to cells • UMTS and EDGE – variable data rates – dynamic allocation of resources ...
ppt - The Fengs
... Synchronous TDMA: time division multiple access • TDM (Time Division Multiplexing): channel divided into N time slots, one per user; access to channel in "rounds" • each station gets fixed length slot (length = pkt trans time) in ...
... Synchronous TDMA: time division multiple access • TDM (Time Division Multiplexing): channel divided into N time slots, one per user; access to channel in "rounds" • each station gets fixed length slot (length = pkt trans time) in ...
PPT
... – All users share same frequency, but each user has own “chip” sequence (i.e., PN code) to encode data – Allows multiple users to “coexist” and transmit simultaneously with minimal interference (if codes are “orthogonal”) ...
... – All users share same frequency, but each user has own “chip” sequence (i.e., PN code) to encode data – Allows multiple users to “coexist” and transmit simultaneously with minimal interference (if codes are “orthogonal”) ...
4G VOIP - Kambing
... NOTE: Radio channels also exhibit various types of fading. Specifically Rayleigh fast fading and log-normally distributed shadow (or slow fading). Out of scope for us today. ...
... NOTE: Radio channels also exhibit various types of fading. Specifically Rayleigh fast fading and log-normally distributed shadow (or slow fading). Out of scope for us today. ...
Template format... - iconstem-17
... Arial Balck [10] Figure size should be named in Arial Black[8] ...
... Arial Balck [10] Figure size should be named in Arial Black[8] ...