Tài liệu Phần mềm xác định radio P5 pdf

... 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...

Ngày tải lên: 21/01/2014, 23:20

... Precision Optimized for DSP56800 Motorola 80 40 MIPS 16 bit fixed Control applications (peripheral IO) DSP56600 Motorola 60 60 MIPS 16 bit fixed Cell phone and 2-way radio DSP56367 Motorola 150 150 ... including those listed below. Some of these suppliers represent long established Software Defined Radio: Enabling Technologies210 companies, while others are relative newcomers and start-ups wh...

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 Co...

Ngày tải lên: 21/01/2014, 23:20

... (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 ... software signals to process the radio signal and software control of the radio parameters as illustrated in Section 1.3.4. 1.2.1 Software Defined Radio and Software Radio There...

Ngày tải lên: 24/12/2013, 17:15

... ð7Þ Software Defined Radio: Enabling Technologies42 Figure 2.11 Signal and noise levels throughout a hypothetical receiver chain 2 Radio Frequency Translation for Software Defined Radios Mark Beach, ... software radio. The latter refers to a software radio with A/D conversion at the carrier frequency; the former refers to a fully flexible and dynamically reconfigurable ‘pragmatic’ software...

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 Techn...

Ngày tải lên: 24/12/2013, 17:15

... radio (SDR). Regardless of the interpretation of the definitions – software radio, software defined radio, software based radios – the challenge of moving the analog-digital boundary closer to the ... Software Defined Radios Brad Brannon, Chris Cloninger, Dimitrios Efstathiou, Paul Hendriks, Zoran Zvonar Analog Devices Data converters are one of the key enabling technologies for the software...

Ngày tải lên: 24/12/2013, 17:15

... achieved by multiplying the received signal with a respective expo- nential function: Software Defined Radio: Enabling Technologies160 Figure 6.6 Position of the channel-of-interest in the receive frequency ... the above results to up-conversion, it is often sufficient to keep the real part Software Defined Radio: Enabling Technologies162 Figure 6.9 Direct realization of digital down-conversio...

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 ... different transmission needs. Starting from definitions of several radio types this chapter discusses the specific features of a software defined radio transceiver architecture and the s...

Ngày tải lên: 21/01/2014, 23:20

... time it takes to correct defi- ciencies in the final product, and time to market. Software Defined Radio: Enabling Technologies266 Although DSPs continue to become more powerful and represent a highly ... more silicon ‘real estate’ and burn more power than an equivalent ASIC solution. Software Defined Radio: Enabling Technologies268 Figure 9.4 Trade-offs of existing processing devices 4 Convent...

Ngày tải lên: 21/01/2014, 23:20