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Topic: Uplink Power Control

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	Global System for Mobile Communications - Wikipedia, the free encyclopedia
		In the 900 MHz band the uplink frequency band is 890-915 MHz, and the downlink frequency band is 935-960 MHz.
		The transmission power in the handset is limited to a maximum of 2 watts in GSM850/900 and 1 watt in GSM1800/1900.
		Indoor coverage is also supported by GSM and may be achieved by using an indoor picocell base station, or an indoor repeater with distributed indoor antennas fed through power splitters, to deliver the radio signals from an antenna outdoors to the separate indoor distributed antenna system.
	en.wikipedia.org /wiki/GSM (2006 words)

	TechOnLine - Power Control in CDMA Cellular Systems (Site not responding. Last check: 2007-09-08)
		Yet another reason for power control is battery life—if the mobile station were to continuously transmit at a power higher than that needed to maintain an acceptable SIR, the battery lifetime is reduced.
		While our power control scheme may be adopted for ad-hoc networks that operate in the absence of a base station, we will concentrate on the base-mobile station scenario in the remainder of this paper.
		In Kim, Wu, and Grandhi, centralized power control was studied, and due to the complexity of the system, centralized power control was suggested only for providing theoretical limits.
	www.techonline.com /community/ed_resource/feature_article/14863 (2490 words)

	Time Variant Power Control in Cellular Networks - Andersin, Rosberg (ResearchIndex) (Site not responding. Last check: 2007-09-08)
		Abstract: We study the transmission power control in a cellular network where the mobility of users results in a time varying gain matrix.
		Then a variant of a standard distributed constrained power control which copes with user mobility is derived.
		Power Control and Transmission Rate Management in Cellular Radio..
	sherry.ifi.unizh.ch /andersin96time.html (770 words)

	Uplink Power Control System; FEATURES (Site not responding. Last check: 2007-09-08)
		The Uplink Power Control System (UPC) is a self-contained, rack-mountable unit, designed for geo-stationary satellite communication systems.
		All monitor and control functions are accessible at the front panel as well as over the remote bus.
		The UPC is configured with one attenuator channel and is capable of up to a total of ten attenuator channels.
	www.miteq.com /satcomeq/misc/d218e (190 words)

	Pricing and Power Control in a Multicell Wireless Data Network - Saraydar, Mandayam, Goodman (ResearchIndex) (Site not responding. Last check: 2007-09-08)
		Abstract: In this paper we consider distributed power control in a multicell wireless data system and study the e#ect of pricing transmit power.
		We consider distributed power control, modeled as a non-cooperative game, where users maximize their utilities in a multicell system.
		1 ciency of pricing-based power control in wireless data netwo..
	sherry.ifi.unizh.ch /384194.html (516 words)

	Satellite Communications "How to Combat Uplink Antenna Power Loss" with Tallguide Ultra Low Loss Waveguide
		System engineers, exposed to transmitter power backoff linearity, to rain attenuation, to uplink power control, multi-carrier signals, feed combining loss, orbital arc obstructions and to various distances between control room and antenna site locations, are continually forced to boost power.
		Since antenna radiated power, EIRP, is equal to the antenna gain plus transmitter HPA power less the waveguide run loss, the system designer, until recently, was forced to use a larger antenna, beef up transmitter power or move the transmitter next to the antenna.
		For high power applications, however, it is recommended that the mode suppressor be placed on the antenna side of the Tallguide system just before the Tallguide transition to standard waveguide.
	www.tallguide.com /uplink.html (1519 words)

	Nonlinear Model Predictive Control (Site not responding. Last check: 2007-09-08)
		In highly dynamic networks, to achieve more efficient resource utilization and higher system throughput, routing and flow control (and power management in wireless networks) need to be treated in an integrated manner.
		The objective of this project is to develop a unifying optimization-based methodology for data network traffic management with integrated consideration of stability, transient performance, robustness (to disturbances, delays, and uncooperative users), scalability (to network size), and quality of service guarantees.
		Fan, M. Arcak, J.T. Wen, “Robustness of CDMA Power Control against Disturbances and Time-Delays,” American Control Conference 2004.
	www.cat.rpi.edu /~wenj/network (596 words)

	[No title]
		The Commission made this disparate allocation to uplinks and downlinks in recognition that added flexibility was needed resulting from the requirement to share and coordinate with terrestrial fixed services in the 17.7-18.8 GHz band.
		Since these systems are limited to an equivalent isotopically radiated power of 1 watt, we do not anticipate that the operation of these systems will cause harmful interference to FSS earth station operations.
		In combination, these power density limits and antenna performance standards ensure that conforming satellite systems will not emit power at off-axis angles at levels high enough to cause unacceptable interference to adjacent satellites spaced at 2-degree intervals.
	www.fcc.gov /Bureaus/International/Notices/1998/fcc98235.txt (10187 words)

	Publications of Tamer Basar
		To measure or to control: optimal control with scheduled measurements and controls.
		Power control for multicell CDMA wireless networks: A team optimization approach.
		IEEE Conference on Decision and Control (Dec 14-17, 2004; Nassau, The Bahamas)
	black.csl.uiuc.edu /~tbasar/publist.html (5694 words)

	Diversity Performance of Precoded Orthogonal Space-Time Block Codes Using Limited Feedback
		Similar to prior power control work for single-antenna systems, we employ a fixed SINR target that allows guaranteed quality-of-service for delay-sensitive data applications.
		We propose two approaches, the first where each user's power is equally allocated to its antenna array, in the second the allocation is adaptive.
		Numerical results show that power control, compared to supposedly optimal water-filling strategies, actually achieves substantially higher throughput at the low SINRs typical in cellular systems, with significantly lower overhead and complexity.
	www.ece.utexas.edu /~rheath/papers/2005/wirelesscomm2 (204 words)

	Downloadable Software
		The WB5IPM Rotor Controller was described in the May 1987 issue of QEX, published by the ARRL.
		The rotor controller is connected to a parallel port (circuit diagram included), or via a GS-232 or RC-2800 serial interface.
		Antenna and radio control for the Kansas City Tracker, as a 32-bit DLL for use with 32-bit applications under Windows 95.
	www.amsat.org /amsat/ftpsoft.html (6064 words)

	Distributed Multiuser Power Control forDigital Subscriber Lines
		This paper considers the multiuser power control problem in a frequency-selective interference channel.
		It implicitly takes into account the loop transfer functions and cross couplings, and it reaches a competitively optimal power allocation by offering an opportunity for loops to negotiate the best use of power and frequency with each other.
		When applied to the upstream power backoff problem in very-high bit-rate digital subscriber lines and the downstream spectral compatibility problem in asymmetric digital subscriber lines, the new power control algorithm is found to give a significant performance improvement when compared with existing methods.
	www.comsoc.org /sac/private/2002/june/1105_20jsac05-yu.html (573 words)

	[No title] (Site not responding. Last check: 2007-09-08)
		Ding and J. Lehnert, "Power control using two-level channel inversion for data traffic in a cellular CDMA system: performance and optimal design," International Journal on Wireless Information Networks, vol.
		Ding and J. Lehnert, "Performance analysis of an uplink power control using truncated channel inversion for data traffic in a cellular CDMA system," IEEE Vehicular Technology Conference, Tokyo, Japan, no. 2.08-3, 5 pages, May 15-18, 2000.
		Ding and J. Lehnert, "On uplink power control using two-level channel inversion: scheme, performance, and optimal design in a cellular CDMA system for data traffic," IEEE Vehicular Technology Conference, Tokyo, Japan, no. 2.08-4, 5 pages, May 15-18, 2000.
	www.ecn.purdue.edu /S3CRL/1999F/Uplink.html (130 words)

	Citebase - A Utility-Based Approach to Power Control and Receiver Design in Wireless Data Networks
		The uplink of a direct-sequence code division multiple access (DS-CDMA) data network is considered and a non-cooperative game is proposed in which users in the network are allowed to choose their uplink receivers as well as their transmit powers to maximize their own utilities.
		It is shown that the equilibrium is one where the powers are SIR-balanced with the minimum mean square error (MMSE) detector as the receiver.
		In addition, this framework is used to study power control games for the matched filter, the decorrelator, and the MMSE detector; and the receivers' performance is compared in terms of the utilities achieved at equilibrium (in bits/Joule).
	citebase.eprints.org /cgi-bin/citations?id=oai:arXiv.org:cs/0507011 (1051 words)

	Newpoint Technologies, Inc. \| 2002 Press Releases \| Newpoint Announces Stratus (Site not responding. Last check: 2007-09-08)
		It will directly establish and maintain the proper user-defined power and frequency levels for carriers on multiple circuits, to ensure optimum performance and to avoid problems with contractual obligations before they occur.
		Newpoint's Stratus Carrier Management and Uplink Power Control System continuously compares target transmission spectral shape, C/N, power level and center frequency against actual values and makes system adjustments to achieve optimal levels.
		Variations that exceed specified boundaries are alarmed, recorded, and presented per carrier, including details for any device alarm that is part of the circuit.
	www.newpointtech.com /press-releases/02_stratus.shtml (294 words)

	Your Daily Briefing Of Satellite
		“With the Model 3010, uplink power levels can be better and more effectively managed for frequencies through Ku and even Ka-bands,” said Jeffrey Chu, Glowlink CEO and president.
		The Model 3010 is a DSP based solution that uses advanced Glowlink power control technology to manage power adjustments.
		“In addition to providing automated power control, the Model 3010 can also prevent against transponder compression or saturation by regulating power level changes, creating an all in one package for dependable and effective power management,” says Michael Downey, Glowlink chief technology officer.
	www.satnews.com /stories2005/1008.htm (258 words)

	L-3 Satellite Networks: Air Traffic Control (Site not responding. Last check: 2007-09-08)
		The network included 11 sites, connecting a control center with airports throughout the region.
		ISAT offers a single platform for simultaneous interactive radar data and voice communications and enabled the customer to improve its ability to serve key air corridors from Europe to Asia and the Middle East.
		As a Ku-band network, where uplink power control is required, each of the remote terminals, as well as the hub, needed this capability.
	www.l-3com.com /snd/satellite/applications_1.html (284 words)

	3GPP specification CRs: 25.214 (Site not responding. Last check: 2007-09-08)
		Clarification of closed loop transmit diversity figure in section 8 and closed loop operation in compressed mode for mode 2 in section 8.3 of TS 25.214
		Inclusion of adjustment loop in downlink power control
		Correction to power control in compressed mode recovery period
	www.3gpp.org /ftp/specs/html-info/25214-CRs.htm (314 words)

	Newpoint Technologies, Inc. \| Products \| Stratus (Site not responding. Last check: 2007-09-08)
		When Stratus is ordered with the optional Uplink Power Control feature system, adjustments are continuously made to achieve optimal transmit levels.
		With the Uplink Power Control option, variations from a target value result in an adjustment of HPA or converter attenuation.
		In addition to monitoring transmission parameters such as center frequency and power level, Stratus provides advanced features that in many cases detect malfunctioning converters and modems and adjacent carrier noise before they affect critical traffic.
	www.newpointtech.com /datasheets/stratus.shtml (386 words)

	3GPP specification CRs: 25.102
		Correction to the UL power control “differential accuracy, measured input” requirement
		Power control downlink - constant BLER target (1.28 Mcps TDD option)
		Power definition corrections for 1.28 Mcps TDD option.
	www.3gpp.org /ftp/specs/html-info/25102-CRs.htm (412 words)

	Satmaster Satellite Link Budget & Sun Outage Software
		Finds HPA size, uplink power requirements, bandwidth and power usage per carrier.
		Determines power or bandwidth limited modes and calculates the power equivalent bandwidth, if appropriate.
		Determines if transponder is power or bandwidth limited and calculates the power equivalent bandwidth if appropriate.
	www.arrowe.com /linkbudget.html (1421 words)

	Satellite Earth Station Monitor and Control (M&C)
		Satellite earth station monitor and control (MandC) software has typically done little more than report on and remotely control ground station equipment operations.
		Now however, emerging service delivery methods utilize satellite networks in conjunction with broadcast, fiber, cable and wireless networks, expanding the control an operator needs to ensure service uptime.
		Monitor and control hybrid networks of satellite and terrestrial equipment including broadcast, satellite, IP network and telecom equipment from one screen
	www.ilc.com /satellite.html (217 words)

	Dr. Christopher Rose
		Codeword Optimization for Uplink CDMA Dispersive Channels, IEEE Transactions on Wireless Communications, vol.
		Intelligent Power Allocation Strategies in an Unlicensed Spectrum.
		Interference Avoidance and Power Control for Uplink CDMA Systems.
	www.winlab.rutgers.edu /~crose (1930 words)

	Free VoIP Tips, Explanations, and Articles
		Sydney Morning Herald - Jul 01 12:17 PM At last, there are many reasons to take your wireless devices to the snowfields.
		Optimize Magazine - Jun 29 10:03 AM VoIP over Wi-Fi represents a double-edged sword for mobile phone service providers: it can be a powerful tool to generate sales, but it can cut into profits.
		You have come to the most powerful VoIP/Voice over IP resource in the world.
	www.freevoiptips.com (13471 words)

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