Unit-2
... • so increase rate by increasing signals – at cost of receiver complexity – limited by noise & other impairments ...
... • so increase rate by increasing signals – at cost of receiver complexity – limited by noise & other impairments ...
Part 2 - UniMAP Portal
... Described by a low cutoff frequency, fc1 and high cutoff frequency, fc2, to define a band of frequencies that are permitted to pass through the filter ...
... Described by a low cutoff frequency, fc1 and high cutoff frequency, fc2, to define a band of frequencies that are permitted to pass through the filter ...
lecture3 - Andrew.cmu.edu
... Guided (twisted pair, fiber) vs. unguided (air, water, vacuum) Simplex, half duplex, full duplex Characteristics - Bit Error Rate - Data Rate (what is the difference between data rate & bandwidth?) - Degradation with distance ...
... Guided (twisted pair, fiber) vs. unguided (air, water, vacuum) Simplex, half duplex, full duplex Characteristics - Bit Error Rate - Data Rate (what is the difference between data rate & bandwidth?) - Degradation with distance ...
Document
... The Yagi is a directional antenna. It is said to have gain because it focuses the radio waves into a, generally, single direction and is therefore not wasting power radiated in directions where it is not required. The Yagi can be used vertically or horizontally. The diagram shows the antenna in the ...
... The Yagi is a directional antenna. It is said to have gain because it focuses the radio waves into a, generally, single direction and is therefore not wasting power radiated in directions where it is not required. The Yagi can be used vertically or horizontally. The diagram shows the antenna in the ...
Digital Signal Processing
... • Random or Stochastic Signals: In many practical situations, there are signals that either cannot be described to any reasonable degree of accuracy by explicit mathematical formulas, or such a description is too complicated to be of any practical use. The lack of such a relationship implies that su ...
... • Random or Stochastic Signals: In many practical situations, there are signals that either cannot be described to any reasonable degree of accuracy by explicit mathematical formulas, or such a description is too complicated to be of any practical use. The lack of such a relationship implies that su ...
Electronics Manual
... Two pairs of plates enable the beam to be deflected either horizontally (x-plates) or vertically (y-plates) when a voltage is applied to them. In normal operation, an internally generated saw-tooth waveform is applied to the x-plates, causing the beam to be deflected horizontally at a constant rate ...
... Two pairs of plates enable the beam to be deflected either horizontally (x-plates) or vertically (y-plates) when a voltage is applied to them. In normal operation, an internally generated saw-tooth waveform is applied to the x-plates, causing the beam to be deflected horizontally at a constant rate ...
Data and Computer Communications
... then abruptly changes to another level periodic signal • signal pattern repeats over time aperiodic signal • pattern not repeated over time ...
... then abruptly changes to another level periodic signal • signal pattern repeats over time aperiodic signal • pattern not repeated over time ...
Chemical Analysis - Wake Forest University
... Indicates how close the measured value is to the true analytical concentration Requires a Standard Reference Material (SRM) of other official measure NIST: National Institute of Standards and ...
... Indicates how close the measured value is to the true analytical concentration Requires a Standard Reference Material (SRM) of other official measure NIST: National Institute of Standards and ...
spring 2016 - Ecs.csus.edu
... The pulse train block s(t): Two important parameters will have to be designed for this block. The first is the pulse amplitude, and the pulse period T sec. You can assume a rectangular pulse with 50 % duty cycle (i.e. half period on, and half period off). Since this pulse train samples the source s ...
... The pulse train block s(t): Two important parameters will have to be designed for this block. The first is the pulse amplitude, and the pulse period T sec. You can assume a rectangular pulse with 50 % duty cycle (i.e. half period on, and half period off). Since this pulse train samples the source s ...
Digital Data, Digital Signal
... where signal strength falls off with distance depends on medium received signal strength must be: ...
... where signal strength falls off with distance depends on medium received signal strength must be: ...
Radio Communications Principles
... direction by a perfect isotropic omnidirectional antenna • If an antenna has a gain of 3dB, that antenna improves on the isotropic antenna in that direction by 3dB, or a factor of 2 (100.3) • The increased power radiated in a given direction is at the expense of other directions ...
... direction by a perfect isotropic omnidirectional antenna • If an antenna has a gain of 3dB, that antenna improves on the isotropic antenna in that direction by 3dB, or a factor of 2 (100.3) • The increased power radiated in a given direction is at the expense of other directions ...
03-DataTransmission
... where signal strength falls off with distance depends on medium received signal strength must be: ...
... where signal strength falls off with distance depends on medium received signal strength must be: ...
High-frequency direction finding
High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is the common name for a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can efficiently communicate over long distances; for example, between U-boats and their land-based headquarters. HF/DF was primarily used to catch enemy radios while they transmitted, although it was also used to locate friendly aircraft as a navigation aid. The basic technique remains in use to this day as one of the fundamental disciplines of signals intelligence, although typically incorporated into a larger suite of radio systems and radars instead of being a stand-alone system.Huff-duff used a set of antennas to receive the same signal in slightly different locations or angles, and then used the slight differences in the signal to display the bearing to the transmitter on an oscilloscope display. Earlier systems used a mechanically rotated antenna (or solenoid) and an operator listening for peaks or nulls in the signal, which took considerable time to determine. Huff-duff's speed allowed it to catch fleeting signals, such as those from the U-boat fleet.The system was initially developed by Robert Watson-Watt starting in 1926, although many of the practical elements were not developed until the late 1930s. Huff-duff units were in very high demand, and there was considerable inter-service rivalry involved in their distribution. An early use was by the RAF Fighter Command as part of the Dowding system of interception control, while ground-based units were also widely used to collect information for the Admiralty to locate U-boats. Between 1942 and 1944, smaller units became widely available and were common fixtures on Royal Navy ships. It is estimated huff-duff contributed to 24% of all U-boats sunk during the war.The basic concept is also known by several alternate names, including Cathode-Ray Direction Finding (CRDF), Twin Path DF, and for its inventor, Watson-Watt DF or Adcock/Watson-Watt when the antenna is considered.