Author : Anonim
Publisher : Unknown
Page : 664 pages
File Size : 43,7 Mb
Release : 1946
Category : Forests and forestry
ISBN : MINN:31951D00044000B
Station Paper
Anonim
Station Paper
Station Paper Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of Station Paper book. This book definitely worth reading, it is an incredibly well-written.
Station Paper
Southeastern Forest Experiment Station (Asheville, N.C.)
Author : Southeastern Forest Experiment Station (Asheville, N.C.)
Publisher : Unknown
Page : 308 pages
File Size : 44,6 Mb
Release : 1953
Category : Forests and forestry
ISBN : UOM:39015068662462
Station Paper by Southeastern Forest Experiment Station (Asheville, N.C.) Pdf
Station Paper
Northeastern Forest Experiment Station (Radnor, Pa.)
Author : Northeastern Forest Experiment Station (Radnor, Pa.)
Publisher : Unknown
Page : 770 pages
File Size : 50,9 Mb
Release : 1949
Category : Forests and forestry
ISBN : UOM:39015053975820
Station Paper by Northeastern Forest Experiment Station (Radnor, Pa.) Pdf
Station Paper
Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.)
Author : Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.)
Publisher : Unknown
Page : 64 pages
File Size : 51,8 Mb
Release : 1951
Category : Electronic
ISBN : STANFORD:36105130666691
Station Paper by Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.) Pdf
Station Paper - Rocky Mountain Forest and Range Experiment Station
Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Author : Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Publisher : Unknown
Page : 504 pages
File Size : 45,8 Mb
Release : 1949
Category : Electronic
ISBN : STANFORD:36105130396620
Station Paper - Rocky Mountain Forest and Range Experiment Station by Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.) Pdf
Station Paper - Northeastern Forest Experiment Station
Northeastern Forest Experiment Station (Radnor, Pa.)
Author : Northeastern Forest Experiment Station (Radnor, Pa.)
Publisher : Unknown
Page : 612 pages
File Size : 54,8 Mb
Release : 1947
Category : Electronic
ISBN : WISC:89030624910
Station Paper - Northeastern Forest Experiment Station by Northeastern Forest Experiment Station (Radnor, Pa.) Pdf
Station Paper - Northern Rocky Mountain Forest and Range Experiment Station
Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.)
Author : Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.)
Publisher : Unknown
Page : 488 pages
File Size : 48,7 Mb
Release : 1948
Category : Forests and forestry
ISBN : UOM:39015006867157
Station Paper - Northern Rocky Mountain Forest and Range Experiment Station by Northern Rocky Mountain Forest and Range Experiment Station (Missoula, Mont.) Pdf
Technical Paper - California Forest and Range Experiment Station
California Forest and Range Experiment Station
Author : California Forest and Range Experiment Station
Publisher : Unknown
Page : 412 pages
File Size : 44,7 Mb
Release : 1953
Category : Forests and forestry
ISBN : UOM:39015048186913
Technical Paper - California Forest and Range Experiment Station by California Forest and Range Experiment Station Pdf
Blind Massive MIMO Base Stations
Marcus Karlsson
Author : Marcus Karlsson
Publisher : Linköping University Electronic Press
Page : 67 pages
File Size : 54,7 Mb
Release : 2018-08-15
Category : Electronic
ISBN : 9789176852491
Blind Massive MIMO Base Stations by Marcus Karlsson Pdf
Massive MIMO (Multiple-Input--Multiple-Output) is a cellular-network technology in which the base station is equipped with a large number of antennas and aims to serve several different users simultaneously, on the same frequency resource through spatial multiplexing. This is made possible by employing efficient beamforming, based on channel estimates acquired from uplink reference signals, where the base station can transmit the signals in such a way that they add up constructively at the users and destructively elsewhere. The multiplexing together with the array gain from the beamforming can increase the spectral efficiency over contemporary systems. One challenge of practical importance is how to transmit data in the downlink when no channel state information is available. When a user initially joins the network, prior to transmitting uplink reference signals that enable beamforming, it needs system information---instructions on how to properly function within the network. It is transmission of system information that is the main focus of this thesis. In particular, the thesis analyzes how the reliability of the transmission of system information depends on the available amount of diversity. It is shown how downlink reference signals, space-time block codes, and power allocation can be used to improve the reliability of this transmission. In order to estimate the uplink and downlink channels from uplink reference signals, which is imperative to ensure scalability in the number of base station antennas, massive MIMO relies on channel reciprocity. This thesis shows that the principles of channel reciprocity can also be exploited by a jammer, a malicious transmitter, aiming to disrupt legitimate communication between two single-antenna devices. A heuristic scheme is proposed in which the jammer estimates the channel to a target device blindly, without any knowledge of the transmitted legitimate signals, and subsequently beamforms noise towards the target. Under the same power constraint, the proposed jammer can disrupt the legitimate link more effectively than a conventional omnidirectional jammer in many cases. Massiv MIMO (eng: Multiple-Input--Multiple-Output) är en teknologi inom cellulär kommunikation som förutspås ha en betydande roll i framtida kommunikationssystem på grund av de många fördelar som denna teknologi medför. Massiv MIMO innebär att basstationen har ett stort antal antenner där varje antenn kan styras individuellt. De många antennerna gör att basstationen kan rikta de elektromagnetiska signalerna på ett sådant sätt att de förstärks på positioner där användarna befinner sig men släcks ut i övrigt. Detta i sin tur innebär att flera användare kan betjänas samtidigt, på samma frekvensband utan att de stör varandra. Detta medför att massiv MIMO kan erbjuda en högre datatakt än nutida cellulära kommunikationssystem. För att kunna rikta signalerna på ett effektivt sätt måste basstationen känna till kanalen, eller utbredningsmiljön, mellan sig själv och de användare som betjänas. När en användare precis kommer in i systemet vet basstationen inte var användaren befinner sig, men måste likväl tillgodose användaren med information om hur systemet fungerar. Nu måste alltså basstationen kommunicera med användaren, utan möjligheten att kunna rikta signalen på ett effektivt sätt. Det är detta problem som vi i huvudsak studerar i denna avhandling: hur man kan utnyttja de många antennerna på basstationen för att skicka information till användarna utan någon kanalkännedom. Vi studerar även hur en gruppantenn med många antenner, baserad på samma teknologi som massiv MIMO, kan användas som en störsändare. Störsändarens mål är att hindra kommunikationen mellan två enheter på ett effektivt sätt. En störsändare med ett stort antal antenner kan, utan någon kännedom av vad de två enheterna skickar, i många fall prestera bättre än en konventionell störsändare på grund av att störsignalen kan riktas mot en specifik enhet.
Monthly Catalog of United States Government Publications
Anonim
Author : Anonim
Publisher : Unknown
Page : 1040 pages
File Size : 47,9 Mb
Release : 2024-06-26
Category : Government publications
ISBN : WISC:89117117135
Monthly Catalog of United States Government Publications by Anonim Pdf
U.S. Forest Service Research Paper NE.
Northeastern Forest Experiment Station (Radnor, Pa.)
Author : Northeastern Forest Experiment Station (Radnor, Pa.)
Publisher : Unknown
Page : 652 pages
File Size : 44,6 Mb
Release : 1963
Category : Forests and forestry
ISBN : WISC:89037105251
U.S. Forest Service Research Paper NE. by Northeastern Forest Experiment Station (Radnor, Pa.) Pdf
Directory of Professional Workers in State Agricultural Experiment Stations and Other Cooperating State Institutions
Erval Jackson Newcomer,J. M. Dunleavy,Marion Ashton Smith,Robert Jay Marty,Charles A. Rindt,Lacy Porter McColloch,Bernard A. Friedman,John Fedkiw
Author : Erval Jackson Newcomer,J. M. Dunleavy,Marion Ashton Smith,Robert Jay Marty,Charles A. Rindt,Lacy Porter McColloch,Bernard A. Friedman,John Fedkiw
Publisher : Unknown
Page : 806 pages
File Size : 41,8 Mb
Release : 1966
Category : Agricultural experiment stations
ISBN : OSU:32435031273881
Directory of Professional Workers in State Agricultural Experiment Stations and Other Cooperating State Institutions by Erval Jackson Newcomer,J. M. Dunleavy,Marion Ashton Smith,Robert Jay Marty,Charles A. Rindt,Lacy Porter McColloch,Bernard A. Friedman,John Fedkiw Pdf
Set includes revised editions of some issues.
Annual report of the chief signal-officer, to the secretary of war
United States signal office
Author : United States signal office
Publisher : Unknown
Page : 330 pages
File Size : 46,9 Mb
Release : 1873
Category : Electronic
ISBN : OXFORD:591001632
Annual report of the chief signal-officer, to the secretary of war by United States signal office Pdf
Paper Industry
Anonim
Author : Anonim
Publisher : Unknown
Page : 904 pages
File Size : 52,5 Mb
Release : 1957
Category : Paper industry
ISBN : UOM:39015018012131
Paper Industry by Anonim Pdf
Proceedings of the Parliament of South Australia
South Australia. Parliament
Author : South Australia. Parliament
Publisher : Unknown
Page : 1106 pages
File Size : 55,6 Mb
Release : 1882
Category : South Australia
ISBN : CHI:096165262
