Md. Zahirul Islam
... multiplexing architecture. Space division multiplexing is a technique by which a transmitter outputs different data in different spatial directions to allow for the simultaneous use of one wavelength by multiple users. In one such system a ceiling-mounted base station has a number of narrow beams es ...
... multiplexing architecture. Space division multiplexing is a technique by which a transmitter outputs different data in different spatial directions to allow for the simultaneous use of one wavelength by multiple users. In one such system a ceiling-mounted base station has a number of narrow beams es ...
802.11ag The - Silex Technology
... transmit power and signal-processing algorithms, utilize the correct antenna type, and provide the receive sensitivity required for a given application and environment. Poor performance typically can be traced back to inferior radio design. Performance on multipath signals provides a good example. A ...
... transmit power and signal-processing algorithms, utilize the correct antenna type, and provide the receive sensitivity required for a given application and environment. Poor performance typically can be traced back to inferior radio design. Performance on multipath signals provides a good example. A ...
Modulation, Demodulation and Coding Course
... Scope of the course Communications is a process by which information is exchanged between individuals through a common system of symbols, signs, or behaviour “It is about communication between people; the rest is technology” ...
... Scope of the course Communications is a process by which information is exchanged between individuals through a common system of symbols, signs, or behaviour “It is about communication between people; the rest is technology” ...
Press text in WinWord format
... for power can also be operated without any problems in existing Gigabit Ethernet networks via Power-over-Ethernet. For this purpose, MICROSENS GmbH & Co. KG has developed an industrial high-power PoE injector, which can be simply mounted on a 35mm DIN rail. The PoE injector has a wide range of appli ...
... for power can also be operated without any problems in existing Gigabit Ethernet networks via Power-over-Ethernet. For this purpose, MICROSENS GmbH & Co. KG has developed an industrial high-power PoE injector, which can be simply mounted on a 35mm DIN rail. The PoE injector has a wide range of appli ...
early forms of long-distance communication
... 1874, was the Quadruplex system, which allowed for four messages to be transmitted simultaneously using the same wire. Use of the telegraph was quickly accepted by people eager for a faster and easier way of sending and receiving information. However, widespread and successful use of the device requ ...
... 1874, was the Quadruplex system, which allowed for four messages to be transmitted simultaneously using the same wire. Use of the telegraph was quickly accepted by people eager for a faster and easier way of sending and receiving information. However, widespread and successful use of the device requ ...
KREST ADAPTIVE ALGORITHM FOR SPEECH COMPRESSION
... analysis/synthesis system is critically sampled, i.e., the overall number of the transformed domain samples is equal to the number of time domain samples, but the system suffers from poor frequency resolution and block effects, which are introduced after quantization or other manipulation in the fre ...
... analysis/synthesis system is critically sampled, i.e., the overall number of the transformed domain samples is equal to the number of time domain samples, but the system suffers from poor frequency resolution and block effects, which are introduced after quantization or other manipulation in the fre ...
Mobile Communication
... • IP has the task of delivering packets from the source host to the destination host solely based on the IP addresses in the packet headers. • The first major version of IP, Internet Protocol Version 4 (IPv4), is the dominant protocol of the ...
... • IP has the task of delivering packets from the source host to the destination host solely based on the IP addresses in the packet headers. • The first major version of IP, Internet Protocol Version 4 (IPv4), is the dominant protocol of the ...
Wireless Communications and Networks
... Affected by oxygen, water, angle of elevation, and higher frequencies ...
... Affected by oxygen, water, angle of elevation, and higher frequencies ...
Class 13 - Oct. 16 - Circuit Switching
... – permits all possible connection requests because any two stations can be connected (and may stay that way for a long time) ...
... – permits all possible connection requests because any two stations can be connected (and may stay that way for a long time) ...
ChannelModelling
... • If a radio channel’s propagating characteristics are not specified, one usually infers that the signal attenuation versus distance behaves as if propagation takes place over ideal free space. Thus over optimizing the channel. • In a wireless mobile communication system, a signal can travel from tr ...
... • If a radio channel’s propagating characteristics are not specified, one usually infers that the signal attenuation versus distance behaves as if propagation takes place over ideal free space. Thus over optimizing the channel. • In a wireless mobile communication system, a signal can travel from tr ...
2. Advantages of Wireless LANs
... shorter ranges and lower but reliable communications at higher ranges. And whereas IEEE 802.11b uses the increasingly congested 2.4-GHz radio band, IEEE 802.11a operates in the less congested 5-GHz unlicensed band, which has more than three times the available spectrum (300 MHz vs. 80 MHz). However, ...
... shorter ranges and lower but reliable communications at higher ranges. And whereas IEEE 802.11b uses the increasingly congested 2.4-GHz radio band, IEEE 802.11a operates in the less congested 5-GHz unlicensed band, which has more than three times the available spectrum (300 MHz vs. 80 MHz). However, ...
Vertical optimization of data transmission for mobile wireless terminals
... In the case of good channel conditions, the only effect of reducing the packet length is to increase the overhead needed to transmit a certain chunk of data. The packet length can be changed by either reducing the size of a TCP packet or introducing fragmentation at the MAC level. That basically the ...
... In the case of good channel conditions, the only effect of reducing the packet length is to increase the overhead needed to transmit a certain chunk of data. The packet length can be changed by either reducing the size of a TCP packet or introducing fragmentation at the MAC level. That basically the ...
Slide 1
... Common types are dial-up modems, ISDN and DSL modems, cable modems, network cards, wireless access points, routers, and hubs ISDN and DSL modems send and receive data from ISDN and DSL lines ...
... Common types are dial-up modems, ISDN and DSL modems, cable modems, network cards, wireless access points, routers, and hubs ISDN and DSL modems send and receive data from ISDN and DSL lines ...
Mobile Communications
... The solution for wireless devices is the same as that for standard cabled network devices: locate the source of the interference and eliminate it. This usually is solved by moving a photocopier or microwave oven across the room or another room. In addition many wireless devices can identify that an ...
... The solution for wireless devices is the same as that for standard cabled network devices: locate the source of the interference and eliminate it. This usually is solved by moving a photocopier or microwave oven across the room or another room. In addition many wireless devices can identify that an ...
Class 4 - Sept. 18-19
... • occurs because propagation velocity of a signal through a guided medium varies with frequency • various frequency components arrive at different times resulting in phase shifts between the frequencies • particularly critical for digital data since parts of one bit spill over into others causing in ...
... • occurs because propagation velocity of a signal through a guided medium varies with frequency • various frequency components arrive at different times resulting in phase shifts between the frequencies • particularly critical for digital data since parts of one bit spill over into others causing in ...
Management Information Systems
... Be able to identify the major media and devices that are used in telecommunications. ...
... Be able to identify the major media and devices that are used in telecommunications. ...
Digital Communication System
... Increasingly reliant on communications technology for business Variety of actors with competing interests Communications systems becoming the target of cyber-terrorist attacks Communications networks now part of the ...
... Increasingly reliant on communications technology for business Variety of actors with competing interests Communications systems becoming the target of cyber-terrorist attacks Communications networks now part of the ...
Heterogeneous Cellular Networks: From Theory to Practice
... either ignoring other-cell interference (single cell models), treating it as having a fixed value (sometimes called the “Wyner” model), or making other major simplifications that make the conclusions from such endeavors questionable. Not surprisingly, theoretical researchers and industry have wound ...
... either ignoring other-cell interference (single cell models), treating it as having a fixed value (sometimes called the “Wyner” model), or making other major simplifications that make the conclusions from such endeavors questionable. Not surprisingly, theoretical researchers and industry have wound ...
Mobile Computing
... mobile phones. It is often described as "2.5G“. GPRS is packet-switched which means that multiple users share the same transmission channel, only transmitting when they have data to send. GPRS provides moderate speed data transfer, by allocating unused cell bandwidth to transmit data. ...
... mobile phones. It is often described as "2.5G“. GPRS is packet-switched which means that multiple users share the same transmission channel, only transmitting when they have data to send. GPRS provides moderate speed data transfer, by allocating unused cell bandwidth to transmit data. ...
Chapter 1 Data Communications and Networks Overview
... — Signal strength often falls off exponentially, so loss is easily expressed in terms of the decibel — Net gain/loss in a cascaded transmission path can be calculated with simple addition and subtraction. ...
... — Signal strength often falls off exponentially, so loss is easily expressed in terms of the decibel — Net gain/loss in a cascaded transmission path can be calculated with simple addition and subtraction. ...
LANs & WANs Requirements and Internet
... Like a bridge but can link many LANs. It allows many terminals all to use the same communications line (backbone – fast medium e.g. optical fibre) between network segments at different times. ...
... Like a bridge but can link many LANs. It allows many terminals all to use the same communications line (backbone – fast medium e.g. optical fibre) between network segments at different times. ...
rf and microwave engineering
... Chapter – I : Advanced digital filter design techniques : Multiple band optimal FIR filters – design of filters with simultaneous constraints in time and frequency response, optimization methods for designing IIR filters, comparison of optimum FIR filters and delay equalized elliptic filters. Chapte ...
... Chapter – I : Advanced digital filter design techniques : Multiple band optimal FIR filters – design of filters with simultaneous constraints in time and frequency response, optimization methods for designing IIR filters, comparison of optimum FIR filters and delay equalized elliptic filters. Chapte ...
William Stallings Data and Computer
... Transmission and reception via antenna Two techniques are used: Directional Focused beam Careful alignment required ...
... Transmission and reception via antenna Two techniques are used: Directional Focused beam Careful alignment required ...