Kiến trúc phần mềm Radio P1 pot

... 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...

Ngày tải lên: 01/07/2014, 10:20

... 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 ... 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 mi...

Ngày tải lên: 01/07/2014, 10:20

... resources. of all, the radio performance depends on the interaction among the ASICs, DSP, digital interconnect, memory, mass storage, and the data-use structure of the radio application. These ... computational demands of the radio application are compatible with the resources of the hardware platform. But the satisfaction of such constraints is only the first step in addressing potenti...

Ngày tải lên: 01/07/2014, 10:20

... State machines therefore apply both to radio ap- plications and infrastructure. Such state machines are probably the central mechanism for controlling system and radio resources in the SDR. Software ... applications can work together. Interfaces from the services layer to the radio applications layer are se- quences of calls that set up radio applications and link them to information...

Ngày tải lên: 01/07/2014, 10:20

... services to be provided. In addition, the mobile radio equipment must fit in a mobile vehicular platform. For the sake of this example, assume that each radio node is to be configured in a commercial ... of communications capabili- ties. The Federal Bureau of Investigation (FBI) has speech-privacy radio technology as do a few of the largest municipalities in the United States. Special o...

Ngày tải lên: 01/07/2014, 10:20

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...

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 ... 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 thr...

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, ... to the topological model of software radios. The interested reader may pursue the topic further via [201 and 99, e.g., in 433]. F. The Canonical Software Radio Node Architecture Structur...

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 ra...

Ngày tải lên: 01/07/2014, 10:20