... single phase low voltage PL of 220V and 50Hz is used as the channel for communication. Fig. 3b shows the receiver unit which demodulate the signal and feeds the data to a personal computer (PC). Visual basic software tools are used for physiological parameters display. The noisy characteristics of p ...
4th Edition: Chapter 1
... Physical Layer Topics • Physical limits of networks for data • Encoding data onto signals ...
... Physical Layer Topics • Physical limits of networks for data • Encoding data onto signals ...
Lecture Slides
... N users uniformly distributed over the interior of a sphere. Each user communicates with another user randomly chosen among all users. Signal power decays based on free space path loss. All users transmit at the same power. No channel separation or diversity. Interference acts as additive white Gaus ...
... N users uniformly distributed over the interior of a sphere. Each user communicates with another user randomly chosen among all users. Signal power decays based on free space path loss. All users transmit at the same power. No channel separation or diversity. Interference acts as additive white Gaus ...
Multiplexer - dhimas ruswanto
... TDM is used with digital signals. Many input signals are combined and transmitted together. The technique interleaves more than one individual digital signal into another channel by giving each original signal time a slot in the multiplexed channel. TDM has split into two separate technologies; ...
... TDM is used with digital signals. Many input signals are combined and transmitted together. The technique interleaves more than one individual digital signal into another channel by giving each original signal time a slot in the multiplexed channel. TDM has split into two separate technologies; ...
Telemetry Peripherals
... Can increase distance by using more MD485s or combining with spread spectrum radios, Ethernet, or phone ...
... Can increase distance by using more MD485s or combining with spread spectrum radios, Ethernet, or phone ...
Wireless LANs and Introduction to IP
... • Receiver uses the same generator -they can synchronize (same seed). ...
... • Receiver uses the same generator -they can synchronize (same seed). ...
The protocol
... Radio - ISM • Existing spectrum allocation •e.g. radio and TV, (mobile), telecommunication, satellite • ISM • Industrial, scientific and medical (ISM) • 3 bands • some frequencies already occupied • uses include military • Bands available • 902 - 928 MHz (26 MHz) •2.400 - 2.4835 GHz (83.5 MHz), unl ...
... Radio - ISM • Existing spectrum allocation •e.g. radio and TV, (mobile), telecommunication, satellite • ISM • Industrial, scientific and medical (ISM) • 3 bands • some frequencies already occupied • uses include military • Bands available • 902 - 928 MHz (26 MHz) •2.400 - 2.4835 GHz (83.5 MHz), unl ...
Part I: Introduction - Computer Science Division
... to BS using CSMA RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send CTS in response to RTS RTS heard by all nodes sender transmits data frame other stations defer transmissions ...
... to BS using CSMA RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send CTS in response to RTS RTS heard by all nodes sender transmits data frame other stations defer transmissions ...
What`s a protocol? - CS Course Webpages
... characters are not sent in the data. A problem because the 'clock' is usually continuous but data may not be there, so we have to know when the line is idle and when a frame starts {frame delimiter} ...
... characters are not sent in the data. A problem because the 'clock' is usually continuous but data may not be there, so we have to know when the line is idle and when a frame starts {frame delimiter} ...
6.3 Wi-Fi: 802.11 Wireless LANs
... CDMA works under the assumption that the interfering transmitted bit signals are additive. This means, for example, that if three senders send a 1 value, and a fourth sender sends a –1 value during the same mini-slot, then the received signal at all receivers during that mini-slot is a 2 (since 1 + ...
... CDMA works under the assumption that the interfering transmitted bit signals are additive. This means, for example, that if three senders send a 1 value, and a fourth sender sends a –1 value during the same mini-slot, then the received signal at all receivers during that mini-slot is a 2 (since 1 + ...
Ethernet (CSMA/CD) - Universitas Hasanuddin
... • Carriers Sense Multiple Access with Collision Detection • Xerox - Ethernet • IEEE 802.3 ...
... • Carriers Sense Multiple Access with Collision Detection • Xerox - Ethernet • IEEE 802.3 ...
Physical and Datalink Layer and LANS: Part I
... – mechanical specifications - how many wires & connector type – electrical specifications - frequency, amplitude and phase of signal – functional - what does each wire do? – Procedural – how & when to perform functions ...
... – mechanical specifications - how many wires & connector type – electrical specifications - frequency, amplitude and phase of signal – functional - what does each wire do? – Procedural – how & when to perform functions ...
Wireless Communications and Networks
... Fundamental frequency - when all frequency components of a signal are integer multiples of one frequency, it’s referred to as the fundamental frequency Spectrum - range of frequencies that a signal contains Absolute bandwidth - width of the spectrum of a signal Effective bandwidth (or just bandwidth ...
... Fundamental frequency - when all frequency components of a signal are integer multiples of one frequency, it’s referred to as the fundamental frequency Spectrum - range of frequencies that a signal contains Absolute bandwidth - width of the spectrum of a signal Effective bandwidth (or just bandwidth ...
Long Term Evolution - Gabriele Falciasecca
... 3) authentication of users : it checks the authorization of the UE to camp on the service provider’s Public Land Mobile Network (PLMN) 4) control plane function for mobility between LTE and 2G/3G access ...
... 3) authentication of users : it checks the authorization of the UE to camp on the service provider’s Public Land Mobile Network (PLMN) 4) control plane function for mobility between LTE and 2G/3G access ...
slides - Fei Hu
... • unique “code” assigned to each user; i.e., code set partitioning • used mostly in wireless broadcast channels (cellular, satellite, etc) • all users share same frequency, but each user has own “chipping” sequence (i.e., code) to encode data • encoded signal = (original data) X (chipping sequence) ...
... • unique “code” assigned to each user; i.e., code set partitioning • used mostly in wireless broadcast channels (cellular, satellite, etc) • all users share same frequency, but each user has own “chipping” sequence (i.e., code) to encode data • encoded signal = (original data) X (chipping sequence) ...
200470 Exam Paper
... booklet provided. Use diagrams where appropriate to enhance your answers.) 1. A 30 minutes telephone conversation is recorded and stored digitally using Pulse Code Modulation at 8000 samples per second. If each sample is encoded as 8-bits, how many floppy disks are required to store the conversation ...
... booklet provided. Use diagrams where appropriate to enhance your answers.) 1. A 30 minutes telephone conversation is recorded and stored digitally using Pulse Code Modulation at 8000 samples per second. If each sample is encoded as 8-bits, how many floppy disks are required to store the conversation ...
Document
... for the frequency at which the station’s carrier oscillates. The signal for one channel does not interfere with the signal for another. ...
... for the frequency at which the station’s carrier oscillates. The signal for one channel does not interfere with the signal for another. ...
802.11 frame - Department of Computer and Information Science
... attenuates as it propagates through matter (path loss) interference from other sources: standardized wireless network frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well multipath propagation: radio signal reflects off objects ground, arriving at des ...
... attenuates as it propagates through matter (path loss) interference from other sources: standardized wireless network frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well multipath propagation: radio signal reflects off objects ground, arriving at des ...
PPT Slide - Gurukul Galaxy
... of 1s and 0s and so can transform it into a completely analog signal by using the digital to analog mechanisms of ASK, FSK, PSX & ...
... of 1s and 0s and so can transform it into a completely analog signal by using the digital to analog mechanisms of ASK, FSK, PSX & ...
Large-scale Wireless Networks: Stochastic Geometry and Ordering
... symmetric alpha stable noise which is from a large-scale interfering network modeled as a Poisson point process. For the signal reception problem, the performance of space-time coding over fading channels with alpha stable noise. We derive pairwise error probability (PEP) of orthogonal space-time bl ...
... symmetric alpha stable noise which is from a large-scale interfering network modeled as a Poisson point process. For the signal reception problem, the performance of space-time coding over fading channels with alpha stable noise. We derive pairwise error probability (PEP) of orthogonal space-time bl ...
View
... • This impacts communications between the sender and receiver, often causing lower performance and unhappy users. ...
... • This impacts communications between the sender and receiver, often causing lower performance and unhappy users. ...
Wireless Technology and convergence
... system time division duplex (UMTS TDD) may in the future provide mobile wireless broadband service for pedestrian, people in moving vehicles and within buildings However, most current implementations are for ...
... system time division duplex (UMTS TDD) may in the future provide mobile wireless broadband service for pedestrian, people in moving vehicles and within buildings However, most current implementations are for ...
Wireless1
... in a buffer-and-burst method, thus the transmission for any user is noncontinuous. This implies that, unlike in FDMA systems which accommodate analog FM, diwtal data and diwtal modulation must be used with TDMA. The transmission from various users is interlaced into a repeating frame structure as sh ...
... in a buffer-and-burst method, thus the transmission for any user is noncontinuous. This implies that, unlike in FDMA systems which accommodate analog FM, diwtal data and diwtal modulation must be used with TDMA. The transmission from various users is interlaced into a repeating frame structure as sh ...
Link Layer
... • Additional bits are stuffed into frames to allow for clock alignment at the start of every frame • In North America, a DS0 data link is provisioned at 56 Kbps. Elsewhere, it is 64 Kbps. • Circuits can be provided in composite bundles ...
... • Additional bits are stuffed into frames to allow for clock alignment at the start of every frame • In North America, a DS0 data link is provisioned at 56 Kbps. Elsewhere, it is 64 Kbps. • Circuits can be provided in composite bundles ...