phần mềm spirit fm radio

... 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...

Ngày tải lên: 24/12/2013, 17:15

... sections describe important considerations in practical receiver design. Radio Frequency Translation for Software Defined Radios 31 Figure 2.1 Diagrammatic representation of the operating frequencies ... 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...

Ngày tải lên: 24/12/2013, 17:15

... While ‘pure’ software radios anticipate analog-to-digital conversion at the antenna, dispensing with the need for this element of the radio, today’s ‘pragmatic’ software defined radios (SDRs), still ... December, 1999. [5] TR2.1, Software Defined Radio Forum, November, 1999. [6] Cummings, M., ‘Time for software defined radio, ’ EE Times, March 11, 2001. Software Defined Radio: Enabling Technologies98 To ... bands (824–894 MHz and 1850–1990 Radio Frequency Front End Implementations for Multimode SDRs 87 Figure 3.5 Prototype implementation of the AN2/6 handset board Radio Frequency Front End Implementations...

Ngày tải lên: 24/12/2013, 17:15

... technologies for the software defined radio (SDR). Regardless of the interpretation of the definitions – software radio, software defined radio, software based radios – the challenge of moving the ... show up as interferers. Software Defined Radio: Enabling Technologies116 Figure 4.9 Typical harmonics of a 14-bit ADC 4 Data Conversion in Software Defined Radios Brad Brannon, Chris Cloninger, Dimitrios ... potential. 4.1 The Importance of Data Converters in Software Defined Radios The use of converters in SDR depends upon the overall radio architecture. A summary of sampling techniques for the various...

Ngày tải lên: 24/12/2013, 17:15

... to the goals of proposed software radio architectures. For the purposes of this work, we will only 1 ‘Pure’ software radio, as distinct from ‘pragmatic’ software radio, incorporates the concept ... obstacles lies in the concepts of software radio [5]. However, realization of software radio systems Superconductor Microelectronics: A Digital RF Technology for Software Radios 131 Table 5.1 Demonstrated ... Microelectronics: A Digital RF Technology for Software Radios 141 4 John Ralston, for example, persuasively argues such a case in Chapter 4 of Software Defined Radio: Origins, Drivers and International Perspectives,...

Ngày tải lên: 21/01/2014, 23:20

... the digital front end of a software radio transceiver with low hardware effort and low power consumption. The concept of the digital front end allows software radio to be implemented today. Acknowledgments The ... Conversion for Software Radio, Artech House, 2002, in press. [10] Hentschel, T. and Fettweis, G., ‘Continuous-time digital filters for sample-rate conversion in reconfigurable radio terminals’,inProceedings ... for software radio , IEEE Communications Maga- zine, Vol. 38, No. 8, August, 2000, pp. 142–150. [13] Hentschel, T., Henker, M. and Fettweis, G.P., ‘The digital front-end of software radio terminals’,...

Ngày tải lên: 21/01/2014, 23:20

... Mitola, J., ‘The software radio architecture’, IEEE Communications Magazine, May, 1995, pp. 26–38. [30] Mitola, J. and Maguire, G., ‘Cognitive radio: making software radios more personal’, IEEE ... Looking even further into each class Software Defined Radio: Enabling Technologies216 So, for an easy method of translation to the context of software radio systems, which is simply a new advanced method ... Bourse in Software Defined Radio: Origins, Drivers and International Perspectives’, Tuttlebee, W. (Ed.), John Wiley & Sons, Chichester, 2002, Chapter 7. 3 Configurable radio with Advanced Software...

Ngày tải lên: 21/01/2014, 23:20

... signal processing for a software defined radio. After a short introduction, the terms ‘digital radio , ‘software radio , ‘software defined radio , and ‘cognitive radio were discussed. We then explored ... no means a software defined radio. To continue our discussion, it is necessary to introduce some definitions [1]. One most important development toward software defined radio technology was the introduction ... product was the digital radio (DR), which is a transceiver that has implemented the baseband processing in digital hardware (digital signal processors, DSPs). Digital radios are broadly used...

Ngày tải lên: 21/01/2014, 23:20

... 2000, Software Defined Radio: Enabling Technologies260 3 For a more comprehensive treatment of this topic see Ralston, J., ‘A market perspective – SDR as the dominant design’ in Software Defined Radio: Origins, ... applicable Software Defined Radio: Enabling Technologies286 necessary to satisfy the requirements of emerging 3G and future 4G technologies and to address the requirements of real time software defined radio: † ... enables the radio to configure to the needs of the operator, while presenting a seam- less upgrade path to their customers [7]. In addition, because there are so many unknowns during radio design...

Ngày tải lên: 21/01/2014, 23:20

... for software radios. Software Defined Radio: Enabling Technologies308 2 See Grable, M., ‘Regulation of software defined radio – United States’, in Tuttlebee, W. (Ed.), Software Defined Radio: Origins, ... different from legacy radio architectures, where the software is intimately tied to the hardware and building a new radio always starts as a hardware design problem. Software Defined Radio: Enabling ... systems. Software Defined Radio: Enabling Technologies296 1 For a history and description of SpeakEasy see Bonser, W. ‘US defence initiatives in software radio ,in Tuttlebee, W. (Ed.), Software Defined Radio: Origins,...

Ngày tải lên: 21/01/2014, 23:20

... American research focused on ‘pure’ software radio, the former approach, whereas in Europe advocates argued that the latter, ‘pragmatic’ software radio, would prevail in terms of first commercial ... of Tuttlebee, W. (Ed.), Software Defined Radio: Origins, Drivers & International Perspectives, John Wiley & Sons, Chichester, 2002. Software Defined Radio Edited by Walter Tuttlebee Copyright ... future telecommunications standards. The most important ones relating to software radio are the SDR Forum, the Enhanced Soft Radio Forum, and various software industry middleware open architecture initiatives,...

Ngày tải lên: 21/01/2014, 23:20

... Mitola, J. and Maguire, G., ‘Cognitive radio: making software radios more personal’, IEEE Personal Commu- nications Magazine, Special Issue on Software Radio, Vol. 6, No. 8, August, 1999, pp. ... for networks to support software (defined) radios: the number of co-existing radio access standards will be huge [23] and it can be assumed that one single radio standard will hardly be able to deliver ... Radio: Origins, Drivers & International Perspectives358 Figure 12.10 SDR terminal with NACCH, after [23] Another approach includes the development of a radio definition language (such as radio knowledge...

Ngày tải lên: 21/01/2014, 23:20

... motivations are particularly strong in the radio field which is why much of the initial consideration has been given to programmable digital radios or software definable radios. There is, however, nothing ... multiband multiwaveform modular tactical radio (FM3 TR) using WDL in place of a more traditional verbal specification. The full decomposition may be found in [14]. The FM3 TR waveform is the result of a ... sources cryptographic information. The Radio provides the conversion between the antenna signal and rf_in/rf_out The Waveform Description Language 375 Figure 13.10 FM3 TR layers 13.3.7 Rise Modulator The...

Ngày tải lên: 21/01/2014, 23:20

... 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....

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 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...

Ngày tải lên: 01/07/2014, 10:20

Ngày tải lên: 01/07/2014, 10:20

Ngày tải lên: 01/07/2014, 10:20

Ngày tải lên: 01/07/2014, 10:20

Ngày tải lên: 01/07/2014, 10:20