phần mềm radio online
Kiến trúc phần mềm Radio P1 pot
Ngày tải lên :
01/07/2014, 10:20
... Interconnect), 316, 320
Radar, 74, 75
Radio applications (layer), 377, 380–380
Radio horizon, 83
Radio infrastructure, 164, 211, 363–368, 378,
380–381
Radio noise, 81, 397
Radio platform (reference model), ... Programmable Digital Radio (PDR) Case Studies 215
A. A Basic Commercial PDR 215
B. Multimode Conventional Radios 218
C. GEC’s Programmable Digital Radio 220
D. ITT Digital Radio 221
E. Commercial ... for people with
strong software background but little background in radio engineering. Soft-
ware radio is about wideband radio frequency (RF) hardware that is given its
“personality” by software....
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Kiến trúc phần mềm Radio P3 pdf
Ngày tải lên :
01/07/2014, 10:20
... other. Each radio has LOS access to a point in the troposphere from which
radio waves are scattered beyond LOS. Due to the weak coupling between
the radio waves and the troposphere, the radios employ ... programmable
digital radios. These radio suites also monitor emergency channels using ded-
icated transceivers. This includes simultaneous VHF and UHF operation.
Illustrative discrete radio products ... include general-purpose, single-channel
ground-based radios and multichannel radio relays. The AN/GRC-171(V)
general-purpose ground-based radio, for example, delivers 20 W of RF power
from vehicular...
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Kiến trúc phần mềm Radio P4 doc
Ngày tải lên :
01/07/2014, 10:20
... or more
radios each)
500–3000 National
Guard troops
50–300 squad radios, 12–80 company
radios, 3–10 high-level command network
radios, radio relays
with 20–50 aircraft 20–50 air mobile radio nodes ... characterizes the expected parameters
of that radio channel. All these are necessary in the analysis of software -radio
architecture.
A. Radio Resource Management
Radio resources consist primarily of the ... the refinements
introduced by software radio and radio- propagation prediction tools.
1. A Simple Model of Radio Propagation and Spectrum Reuse
Ideally, radio
energy propagates in three dimensions...
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Kiến trúc phần mềm Radio P5 docx
Ngày tải lên :
01/07/2014, 10:20
... inheritance re-
lationships from the generic radio node class o f object. The domain (e.g.,
handset, cell site, vehicular radio) property of the radio node is therefore in-
herited by the function, ... interface. Layer 1 services are provided in the radio front end.
The architecture accommodates multiple layer 1 services corresponding to the
radio modes of the SDR. Thus, for example, a dual ... Receive
$
, which would correspond to the situation that the radio is
transmitting and receiving both at once. This might be acceptable for some
radios, but not for one controlled by
C
. Each subset...
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Kiến trúc phần mềm Radio P6 pptx
Ngày tải lên :
01/07/2014, 10:20
... to be radio- aware so that the radio s low data rates, high variability in
data transfer times, and occasional outages do not severely curtail user satis-
faction with the services. In the radio ... approaches, the radio applications and infrastructure software elements
are intricately interwoven. Open-architecture approaches now favor the use of
the industry-standard CORBA [216] in radio infrastructure ... This includes not just the processors, but the many
computer-controlled features of the analog radio platform. Software design
tradeoffs, then, include both top-down application of open-architecture...
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Kiến trúc phần mềm Radio P7 potx
Ngày tải lên :
01/07/2014, 10:20
... disaster-relief case study?
252
ANTENNA SEGMENT TRADEOFFS
bands. Using typical military radios such as SINCGARS, these radios will
jam each other. Operational steps may reduce the number of networks ... 7-1.
Due to the software radio s ability to concentrate energy, software constraints
may be required to preclude unacceptable exposure levels. For example, a
four-channel radio might be permitted ... effects have to be taken into account in the design of a
handheld radio product? Describe the potential impact of this aspect of
the radio on the control software in an aggressive SDR application.
5.
What...
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Kiến trúc phần mềm Radio P8 pptx
Ngày tải lên :
01/07/2014, 10:20
... SPEAKeasy-like radio may have to operate within
a kilometer of a high-power (90 dBm) troposcatter communications system.
Metal structures may reflect some of the radio energy with nonlinear inter-
modulation ... Call
EXERCISES
287
2.
Consider a wideband radio that implements frequency hopping with a
fast-hopping LO. What steps are necessary to migrate that implementation
toward a software -radio architecture? What benefits ... in analyzing the effects of
RFI and EMI. RFI originates with high-power radio sources that are external
to the software radio and its host platform. EMI o riginates within the host
hardware or...
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tài liệu yêu cầu đặc tả phần mềm : DỰ ÁN:CC02-NEWS-ONLINE
Ngày tải lên :
17/01/2013, 15:40
... thống hoạt động trên môi trường Internet và wamp server
Ngôn ngử :PHP and MYSQL
Mô hình yêu cầu phần mềm
1.Mô tả yêu cầu
c u s t o m M ô h ì n h y ê u c . . .
Yêu cầu chức năng
+ Website
+ Quản...
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Tài liệu Phần mềm xác định radio P1 docx
Ngày tải lên :
24/12/2013, 17:15
... Definition of Digital Radio, Multiband, and Multimode
Digital radio is a radio in which the information is digitized at some point between the
antenna and the input/output devices. Digital radio does not ... simple updates of radio functionality to complete over-the-air downloads of new
radio interfaces. Sharing of processing capabilities by radio functions and applications riding
the radio transport ... (ASICs), in which case the radio would be considered to be a digital radio but not
an SDR.
Software Based Radio 13
Figure 1.7 Conceptual definition of the software defined radio (SDR). This functional...
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Tài liệu Phần mềm xác định radio P2 docx
Ngày tải lên :
24/12/2013, 17:15
... implicit
nonlinearity of the receiver hardware. It can be seen from Figure 2.7 that the blockers are
permitted to have an amplitude of up to 2 23 dBm.
Radio Frequency Translation for Software Defined Radios ... in the error amplifier and the signal splitting at the output of the PA.
Radio Frequency Translation for Software Defined Radios 51
As an alternative, it may be possible to vary the geometry of ... are then mixed with themselves to produce a DC voltage at the input to
Radio Frequency Translation for Software Defined Radios 57
Figure 2.24 Sources of DC offset
the IF frequency is small by...
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