
	Where results make sense

Topic: Received noise power

In the News (Fri 17 Feb 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	transmissionII: airborne
		Antenna noise temperature is the temperature of a hypothetical resistor at the input of an ideal noise-free receiver that would generate the same output noise power per unit bandwidth as that at the antenna output at a specified frequency.
		In telecommunications, effective input noise temperature is the source noise temperature in a two-port network or amplifier that will result in the same output noise power, when connected to a noise-free network or amplifier, as that of the actual network or amplifier connected to a noise-free source.
		The FM improvement factor is the quotient obtained by dividing the signal-to-noise ratio (SNR) at the output of an FM receiver by the carrier-to-noise ratio (CNR) at the input of the receiver.
	www.newmuseum.org /airborne/glossary.html (3952 words)

	United States Patent Application: 0040091056
		The receiver of claim 23, wherein the noise power spectral density is measured at an output of a discrete Fourier transform.
		The receiver of claim 23, wherein the target spectral response is the inverse of the measured noise power spectral density.
		The analog noise power spectral density observed at the input of the receiver A/D is S.sub..eta.(f).
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040091056".PGNR.&OS=DN/20040091056&RS=DN/20040091056 (5960 words)

	Received noise power - Wikipedia, the free encyclopedia
		The calculated or measured noise power, within the bandwidth being used, at the receive end of a circuit, channel, link, or system.
		The absolute power of the noise measured or calculated at a receive point.
		The value of noise power, from all sources, measured at the line terminals of telephone set's receiver.
	en.wikipedia.org /wiki/Received_noise_power (137 words)

	Antenna noise Under construction
		In estimating the noise level at the receiver due to external sources, the gain and orientation of the receiving antenna must be considered.
		Galactic noise may be defined as the noise at radio frequencies caused by disturbances that originate outside the earth or it's atmosphere.
		The levels of cosmic noise received by an antenna directed at a noise source may be estimated by correcting the relative noise levels with a half-wave dipole (from Fig.
	www.veron.nl /tech/noise/antennanoise.htm (1722 words)

	Mode S - Tomorrow's Downlink?
		Received signal strength is directly proportional to the capture area of the antenna.
		T is the noise temperature in kelvins which for this article we took to be 120K on 2.4 GHz.
		B is the receiver bandwidth; assume 2.7 kHz for a typical SSB receiver.
	www.amsat.org /amsat/articles/g3ruh/115.html (1774 words)

	Article: Low Power Signals: Special Interest Noise (Site not responding. Last check: 2007-11-04)
		Power is a measure of the strength of the radio waves.
		A stations power measures its ability to penetrate walls, the number of times that it can bounce off of obstructions and still be able to induce a listenable signal in the receiver.
		Low power broadcasters could never create even a fraction of a percent of the interference that is caused by the radio stations that are already on the dial.
	www.prometheusradio.org /artnoise.shtml (4431 words)

	Performance of Optical Wireless OOK and PPM Systems Under the Constraints of Ambient Noise and Multipath Dispersion
		The received optical power level was measured at the point underneath the lamp as well as along two perpendicular axes which run from that point.
		With the optical power of the lamps known, the received ambient noise power was calculated as received by a photodetector of area 5 mm
		Hence, to account for the power levels associated with the paths that hit the receiver from a reflection, calculations have been conducted in a similar fashion as power levels associated with rays that hit the receiver directly from the transmitter.
	www.comsoc.org /ci/private/1998/dec/Ghani.html (3174 words)

	Received Signal Intensity & Power (Text)
		We shall also assume that all three types of transmitting and receiving antenna are located in space, and that the receiving antenna is identical to the transmitting antenna.
		For the 10 meter diameter telescope at 656 nm, the received flux density:
		The power received by a 100% efficient antenna, be it microwave or optical, is given by:
	www.coseti.org /9006-004.htm (145 words)

	VOACAP Quick Guide: Calculating the Received RF Noise Power (Site not responding. Last check: 2007-11-04)
		I thought the antenna gain would affect both the received signal power and the noise power equally.
		The noise power is computed from the CCIR radio noise model where the noise power is assumed to arrive from all directions equally.
		Thus if the noise arrives from all angles equally, any antenna will produce approximately as much noise power at the receiver as the short lossless whip.
	www.uwasa.fi /~jpe/voacap/noisepower.html (508 words)

	A Smarter Approach to Resolving Power-Line Noise
		If the noise on the AM radio stops while the power is off, the source of the interference is within the residence.
		If the noise stopped while the power was off, locate the circuit supplying the power to the noise source using an AM radio as before, and de-energize the individual circuit breakers one at a time until the noise stops.
		Noise that varies with the time of day is related to what people are doing, usually pointing to an electrical device or appliance.
	tdworld.com /mag/power_smarter_approach_resolving (3374 words)

	Dredging noise (Site not responding. Last check: 2007-11-04)
		Noise levels within the port environs are usually higher than those of surrounding residential areas.
		The residential receiver is considered the most sensitive; however, due to the distance of the residential receivers to the proposed development (1 km) it was considered highly unlikely to be impacted.
		Based on distance attenuation, the received noise level of the operating crane at 400m distance (nearest industrial occupier) would be 54 dB(A).
	home.austarnet.com.au /mickdenley/port_site/DredgingNoise.htm (567 words)

	ARRLWeb: The Power-Line Noise FAQ Page (Site not responding. Last check: 2007-11-04)
		If the radiated noise is observed on a 'scope, the noise will be present during the peaks, as shown in C. Because power-lines carry 60 Hz ac, the voltage on them passes through two peaks each cycle (one positive and one negative) and pass through zero twice each cycle.
		Noise that varies with the weather is almost always caused by an outdoor source, indicating power-line noise.
		Noise that varies with the time of day is related to what people are doing, usually pointing to some electrical device or appliance.
	www.arrl.org /tis/info/powerline-FAQ.html (6675 words)

	VOACAP Quick Guide: Calculating the Received RF Noise Power (Site not responding. Last check: 2007-11-04)
		The noise power is computed from the CCIR radio noise model where the noise power is assumed to arrive from all directions equally.
		Thus if the noise arrives from all angles equally, any antenna will produce approximately as much noise power at the receiver as the short lossless whip.
		Rhombics and terminated vee antennas are examples where the efficiency factor of the antenna must be subtracted from the CCIR noise power.
	www.voacap.com /noisepower.html (508 words)

	Nat' Academies Press, The Global Positioning System: A Shared National Asset (1995)
		Thus: Noise power = (10.-19.86 milliwatts/Hz/K)(1,000 Hz)(100 K) = 10-14.86 milliwatts or -148.6 dBm Given the minimum received power level for the L2 signal, which is -136 dBm, the ratio of signal-to-noise can be calculated: Signal-to-noise = received power - noise power = -136 dBm -(-148.6 dBm) = 12.6 dB.
		If the detection threshold were conservatively set at three times the noise there would only be a 1-three sigma, or about 1 percent probability of false detection.
		If a receiver is implemented with a parallel search capability of 1,000 correlation channels, a full search over 1 second of delay could be accomplished in 10 seconds based on the equation below.1 (107 chips)(0.001 correlation channel sec/chip search)/(1,000 correlation channel) = 10 seconds.
	www.nap.edu /books/0309052831/html/253.html (1093 words)

	Noise and ACPR correlation in CDMA power amplifiers
		Then, comparing the in-channel noise power elevation defined by (8) and the out-of-channel spectral re-growth [5], [6] imposed by IMD products yields the following: It can be concluded that the mechanism of the appearance of these two figures of merit is virtually the same except for the different weighting coefficients.
		In fact, the weighting functions in figure 2 — bottom represent the clipping noise power imposed by a PA non-linear characteristic, and this noise is distributed through frequencies and divided on different terms.
		This should not be considered a correlation between the in-channel noise power and ACPR for the center of an adjacent channel.
	rfdesign.com /mag/radio_noise_acpr_correlation/index.html (2330 words)

	ARRLWeb: The Issue of Power-Line Noise
		The proliferation of electrical and electronic devices that are potential victims of power-line noise, coupled with today's increased dependence on mobile and wireless communications, have each contributed to this increase.
		It was significant source of noise until it was replaced by utility personnel.
		This noise does not propagate very far from the source because it is a low-current phenomenon that does not couple into the adjacent wires.
	www.arrl.org /tis/info/HTML/pwr-line-noise (711 words)

	Received noise power -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-04)
		Note: The related bandwidth and the (Click link for more info and facts about noise weighting) noise weighting must also be specified.
		The value of noise power, from all sources, measured at the (A spatial location defined by a real or imaginary unidimensional extent) line terminals of (Electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds) telephone set's receiver.
		Note: Either (Click link for more info and facts about flat weighting) flat weighting or some other specific amplitude- (The number of occurrences within a given time period (usually 1 second)) frequency characteristic or noise weighting characteristic must be associated with the measurement.
	www.absoluteastronomy.com /encyclopedia/r/re/received_noise_power.htm (187 words)

	K2BJ.COM - Noise Suppression - Power Supply (Site not responding. Last check: 2007-11-04)
		It is always advisable to draw your power directly from the battery, connecting through the firewall to the battery terminals using good heavy gauge wire suited for this purpose and available at most ham outlets and electrical supply houses.
		Running the rig at full power on a tap on the air conditioner circuit, for example, is not advised and will regularly blow fuses and create hazardous stress on a line that was not designed for this purpose.
		When routing the power line through the firewall keep it away from heat sources, moving parts and, of course, any other harness wiring which may represent an RFI source which, through inductive coupling, may allow noise into your power supply.
	www.k2bj.com /Pages/Noise/PowerSup.htm (899 words)

	QUICK-START INSTRUCTIONS for WSJT v0 (Site not responding. Last check: 2007-11-04)
		The green line is a graph of received noise power over the time you were recording; the grayscale plot shows the distribution of noise power over the audio frequency range, as well as over time.
		The magenta curve illustrates the average spectrum of received noise and therefore (in the absence of an actual signal) represents your receiver's passband shape, including the effects of IF and audio filters as well as the receiver-to-soundcard interface.
		When a received signal is displayed in the plot area, moving the mouse pointer across the area causes a number beneath the plot, left of center, to read out the position of the cross-hairs in seconds.
	www.geocities.com /Area51/Dungeon/8804/wsjthelp.html (3110 words)

	Power Line Noise Hunting
		I've noticed that there is a much higher noise level in the area around my office compared to my home location and have often had to drive away from the office in order to clearly pick up the desired stations over the hash and hum from the above ground lines in this area.
		His system used a Radio Shack Air Band AM receiver (part number 12-615) with a home made dipole antenna system and allowed him to easily track down and identify the noise sources in his neighborhood.
		I'd identified that the noise levels were higher slightly south of my office (near the intersection of Golf and Roselle Roads) and proceeded to a large parking lot on the northeast corner of the intersection.
	www.qsl.net /n8dmt/powerline.html (3195 words)

	Noise Control Engineering, Inc. (Active)
		Noise from planes, trains, traffic can be abated to minimize its impact on the environment.
		Noise and vibration treatment design details need to be provided in order to achieve the required acoustic performance.
		Recommendations for achievable noise and vibration are provided, as well as clear and well defined text for incorporation into the contract document.
	www.noise-control.com (2986 words)

	CommsDesign - RF Design: Will the Real E_b/N₀ Please Stand Up?
		In addition, receiver designers often choose a physical location within the receiver for their SNR (and system temperature) models that is different from the location that system designers generally use as a reference.
		A digital communication receiver system (Figure 1) can be described in a simplified manner as consisting of a receiving antenna, a lossy line, a receiver whose major components are amplifiers, a correlator or matched filter and a sampler, followed by a detector block (wherein discrete decisions are made).
		The concept of effective noise temperature is a convenient model that allows the internal noise of a circuit element to be represented by the designer as an input source of noise temperature to an idealized version of that circuit.
	www.commsdesign.com /showArticle.jhtml?articleID=16500988 (2914 words)

	List of noise topics (Site not responding. Last check: 2007-11-04)
		Armstrong, leader of the Noise Team in the Federal Highway...
		Noise budgets help maintain signal integrity in low-voltage systems.
		generating a signal- noise budget is to make a list of all possible signal...
	hallencyclopedia.com /List_of_noise_topics (365 words)

	Quatro Link Margin Analysis
		Within the given power and weight budget of the spacecraft, the transmitter can be operated for 12 minutes with 5 W output power.
		Therefore, the power received in a bandwidth B from a 1.0 deg beam (30-ft dish) or a 4.5 deg beam (2-m dish) pointed right at the Sun is:
		In the low-perigee scenario, the solar noise power received in a 440 kHz bandwidth is -92.2 dBm, when the Sun is within the main beam of the antenna.
	sprg.ssl.berkeley.edu /quatro/mtg_062097/modifiedLinkAnalysis.html (1796 words)

	WSJT Version 0
		The green line is a graph of received noise power (vertical axis) over the time you were recording (horizontal axis).
		The purple curve illustrates the average spectrum of received noise and therefore (in the absence of an actual signal) represents your receiver's passband shape, including the effects of IF and audio filters as well as the soundcard interface.
		Ideally the power should be the same with each tone; in practice, tolerances of +/- 10% or even +/- 20% are acceptable, but 50% changes will deteriorate your signal’s readability.
	sharon.esrac.ele.tue.nl /pub/fsk441/wsjthelp.htm (5560 words)

	Definition: received noise power (Site not responding. Last check: 2007-11-04)
		The calculated or measured noise power, within the bandwidth being used, at the receive end of a circuit, channel, link, or system.
		The absolute power of the noise measured or calculated at a receive point.
		The value of noise power, from all sources, measured at the line terminals of telephone set's receiver.
	www.its.bldrdoc.gov /fs-1037/dir-030/_4454.htm (101 words)

	IDA > Grundutbildning > Kurs > TDDC22 > Laboration 3
		The problem is to determine the lowest necessary power of the transmitter so that the receiver is be able to recevie the signals.
		The transmitted power is reduced with a factor of 8e-10 between transmitter and receiver.
		The received noise power is 8e-11 W. The noise is assumed to be additive white Gaussian.
	www.ida.liu.se /~TDDC22/labs/lab3Telecom.shtml (1893 words)

Try your search on: Qwika (all wikis)