摘要 :
This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This l...
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This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This large frequency range and wide bandwidth makes this hardware suitable for implementing most wireless standards. A direct conversion RFIC developed by Motorola, drives the core of the RF front end. The various RF parameters can be changed by programming this RFIC through a serial peripheral interface (SPI). As part of this work we further develop an intelligent software driver to control different parameters of the RFIC. Thus the combination of highly flexible front end and flexible software driver makes this hardware an excellent choice for whitespace devices. The performance of this front end has been tested and measured and has been integrated into a daughterboard format for the Universal Software Radio Peripheral (USRP), a hardware device which enables the rapid design and implementation of software defined radio (SDR).
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摘要 :
This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This l...
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This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This large frequency range and wide bandwidth makes this hardware suitable for implementing most wireless standards. A direct conversion RFIC developed by Motorola, drives the core of the RF front end. The various RF parameters can be changed by programming this RFIC through a serial peripheral interface (SPI). As part of this work we further develop an intelligent software driver to control different parameters of the RFIC. Thus the combination of highly flexible front end and flexible software driver makes this hardware an excellent choice for whitespace devices. The performance of this front end has been tested and measured and has been integrated into a daughterboard format for the Universal Software Radio Peripheral (USRP), a hardware device which enables the rapid design and implementation of software defined radio (SDR).
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摘要 :
This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This l...
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This paper introduces a flexible RF front end for whitespace communication. The designed front end can operate over any frequency from 100 MHz to 2.5 GHz and the channel bandwidth can be programmable from 4.5 kHz to 10 MHz. This large frequency range and wide bandwidth makes this hardware suitable for implementing most wireless standards. A direct conversion RFIC developed by Motorola, drives the core of the RF front end. The various RF parameters can be changed by programming this RFIC through a serial peripheral interface (SPI). As part of this work we further develop an intelligent software driver to control different parameters of the RFIC. Thus the combination of highly flexible front end and flexible software driver makes this hardware an excellent choice for whitespace devices. The performance of this front end has been tested and measured and has been integrated into a daughterboard format for the Universal Software Radio Peripheral (USRP), a hardware device which enables the rapid design and implementation of software defined radio (SDR).
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摘要 :
The widespread need for radio broadband services (such as video broadcasting) requires the use of radio that is capable to deliver such services. Unfortunately, beside benefits of using broadband radios (higher bit rates) there ar...
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The widespread need for radio broadband services (such as video broadcasting) requires the use of radio that is capable to deliver such services. Unfortunately, beside benefits of using broadband radios (higher bit rates) there are also disadvantages, ie less range of operation in comparison to the narrowband radios range and less resistance to jamming (broadband operation results in increase of detection sensitivity and jamming susceptibility). This article presents the state of work on the military broadband waveform that enables coalition work between radio transceivers provided by different manufacturers (areas difficult to standardize) The state of work on the Polish broadband SDR (Software Defined Radio), evaluation of its performances and test results that were conducted both in a laboratory and real-environment is presented. The results of tests reveal high potential use of this radio in BMS (Battlefield Management System).
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摘要 :
The widespread need for radio broadband services (such as video broadcasting) requires the use of radio that is capable to deliver such services. Unfortunately, beside benefits of using broadband radios (higher bit rates) there ar...
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The widespread need for radio broadband services (such as video broadcasting) requires the use of radio that is capable to deliver such services. Unfortunately, beside benefits of using broadband radios (higher bit rates) there are also disadvantages, ie less range of operation in comparison to the narrowband radios range and less resistance to jamming (broadband operation results in increase of detection sensitivity and jamming susceptibility). This article presents the state of work on the military broadband waveform that enables coalition work between radio transceivers provided by different manufacturers (areas difficult to standardize) The state of work on the Polish broadband SDR (Software Defined Radio), evaluation of its performances and test results that were conducted both in a laboratory and real-environment is presented. The results of tests reveal high potential use of this radio in BMS (Battlefield Management System).
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摘要 :
Software Defined Radio (SDR) technology enables the flexibility of a programmable hardware platform for radio applications. A wideband SDR can be programmed to function with various radio systems: FM radio, GSM (2G), 3G or WiFi sy...
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Software Defined Radio (SDR) technology enables the flexibility of a programmable hardware platform for radio applications. A wideband SDR can be programmed to function with various radio systems: FM radio, GSM (2G), 3G or WiFi systems. In this paper, the BladeRF SDR with the frequency range of 300 MHz - 3.8 GHz and full-duplex transmission capability will be set up as a GSM BTS (base transceiver station). The BladeRF is working with the YateBTS software for the BTS operation. Raspberry Pi is utilized as the processor to provide further portability. A GSM repeater that is connected to the BladeRF was used to amplify the signal up to 41 dB, and can increase the coverage range to about 70 m. Although the reliability of voice and SMS communication is only about 50% and 85% respectively, the BladeRF can still provide an ad-hoc alternative communication system in time of emergency or in remote areas.
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摘要 :
Software Defined Radio (SDR) technology enables the flexibility of a programmable hardware platform for radio applications. A wideband SDR can be programmed to function with various radio systems: FM radio, GSM (2G), 3G or WiFi sy...
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Software Defined Radio (SDR) technology enables the flexibility of a programmable hardware platform for radio applications. A wideband SDR can be programmed to function with various radio systems: FM radio, GSM (2G), 3G or WiFi systems. In this paper, the BladeRF SDR with the frequency range of 300 MHz - 3.8 GHz and full-duplex transmission capability will be set up as a GSM BTS (base transceiver station). The BladeRF is working with the YateBTS software for the BTS operation. Raspberry Pi is utilized as the processor to provide further portability. A GSM repeater that is connected to the BladeRF was used to amplify the signal up to 41 dB, and can increase the coverage range to about 70 m. Although the reliability of voice and SMS communication is only about 50% and 85% respectively, the BladeRF can still provide an ad-hoc alternative communication system in time of emergency or in remote areas.
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摘要 :
The wireless communication radio frequency transceiver system is the front part of the communication system, and it is also the basis of the normal operation of the communication system. If the transceiver system does not operate ...
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The wireless communication radio frequency transceiver system is the front part of the communication system, and it is also the basis of the normal operation of the communication system. If the transceiver system does not operate smoothly, it will affect the communication effect of people. Therefore, strengthening the design and optimization of the wireless communication radio frequency transceiver system plays an important role. In the actual situation, although my country's communication system has made great progress and various technologies have been continuously improved, there are still many problems in the wireless communication radio frequency transceiver system. When designing a wireless communication radio frequency transceiver system, many factors need to be considered to effectively improve the quality of transceivers. Therefore, the article explores the structure and principle of each module on the basis of the basic principles of wireless communication radio frequency technology. After that, I will fundamentally put forward suggestions for improving the performance of each module to achieve the wide bandwidth and high rate of the wireless transmission radio frequency transceiver system.
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摘要 :
We describe the opportunities, and the research challenges, presented in the development of 100-340GHz wireless communications and imaging systems. In such links, short wavelengths permit massive spatial multiplexing both for netw...
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We describe the opportunities, and the research challenges, presented in the development of 100-340GHz wireless communications and imaging systems. In such links, short wavelengths permit massive spatial multiplexing both for network nodes and point-point links. 100-340GHz imaging systems can provide tens of thousands of image pixels and ~0.10 angular resolution from small apertures, supporting foul-weather driving and aviation.
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摘要 :
We describe the opportunities, and the research challenges, presented in the development of 100-340GHz wireless communications and imaging systems. In such links, short wavelengths permit massive spatial multiplexing both for netw...
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We describe the opportunities, and the research challenges, presented in the development of 100-340GHz wireless communications and imaging systems. In such links, short wavelengths permit massive spatial multiplexing both for network nodes and point-point links. 100-340GHz imaging systems can provide tens of thousands of image pixels and ~0.10 angular resolution from small apertures, supporting foul-weather driving and aviation.
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