Tài liệu Phần mềm xác định radio P1 docx

... (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

... 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

... O’Fee, S. ‘European regulation of software radio and Grable, M., ‘Regulation of software defined radio – United States’ in Tuttlebee, W. (Ed)., Software Defined Radio: Origins, Drivers and International ... 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...

Ngày tải lên: 21/01/2014, 23:20

... this func- tionality and so the Radio entity is not decomposed further in order to avoid a specification bias to a particular approach. The abstract capabilities of a radio are therefore expressed directly ... 250 and 2000 hops/s in 25 kHz channels from 30 to 400 MHz. Figure 13.9 shows the interface of the radio together with a decomposition of its operating environment into a data termi...

Ngày tải lên: 21/01/2014, 23:20

... 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

... 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

... Control applications (peripheral IO) DSP56600 Motorola 60 60 MIPS 16 bit fixed Cell phone and 2-way radio DSP56367 Motorola 150 150 MIPS 24 bit fixed Audio processing MSC8102 (Starcore) Motorola 300 ... 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 w...

Ngày tải lên: 21/01/2014, 23:20