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Multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio

A multi-mode, multi-band, software radio technology, applied in wireless communication, baseband system components, electrical components, etc., can solve problems such as no application working environment, aircraft flight impact, etc.

Active Publication Date: 2013-01-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Defects and deficiencies in the prior art: as we all know, many civil radio communication equipment must be turned off on the plane, because many of its operating frequency bands overlap with the navigation system frequency band of the aircraft, so these communication equipment are prohibited from being used, so as not to cause damage to the aircraft. impact on the flight of the aircraft
However, the current radio frequency system is still not used in the special working environment of aircraft navigation.

Method used

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  • Multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio
  • Multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio
  • Multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio

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Embodiment Construction

[0025] The technical scheme of the invention will be described in detail below in conjunction with the drawings:

[0026] Such as figure 1 As shown, the software radio-based multi-mode multi-band radio frequency airborne picocellular communication system of this example includes a GSM / CDMA system module, a WLAN system module, and a control system.

[0027] GSM / CDMA system:

[0028] The receiving module is composed of a switch, a duplexer, a radio frequency front end, a low noise amplifier, an intermediate frequency filter, a first variable gain amplifier, an amplifier, a second variable gain amplifier, a mixer and an operational amplifier in series;

[0029] The input end of the modulator in the transmitting module is connected to two operational amplifier output ends, and the output end of the modulator is connected in series with amplifier, controllable attenuator, power amplifier, switch and duplexer in sequence.

[0030] WLAN system:

[0031] The receiving module is composed of a r...

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Abstract

The invention discloses a multimode multiband radio-frequency onboard micro-micro cellular communication system based on software defined radio, which comprises a receiving module, a local oscillator module, a transmitting module and a control module. The radio-frequency micro-micro cellular communication system can support multiple working bands and working modes: 800-1000 MHz (GMSK (Gaussian Minimum Shift Keying) / CDMA (Code Division Multiple Access) 1X), 2.412-2.472 GHz, and 5.0-5.8 GHz (QPSK (Quadrature Phase Shift Keying) / QAM (Quadrature Amplitude Modulation) 16 / OFDM (Orthogonal FrequencyDivision Multiplexing)-QAM 64). In particular environments, such as aircraft flight and the like, the radio-frequency micro-micro cellular communication system can support different radio network services: GSM (Global System for Mobile Communications) (935-960 MHz / 890-915 MHz), CDMA (824-849 MHz / 869-894 MHz), 802.11b / g (WLAN (Wireless Local Area Network) 2.412-2.472 GHz) and 802.11a (WLAN 5.0-5.8GHz) communication systems. The channel bandwidth varies as the operation mode varies. The maximum bandwidth can reach 20 MHz, the maximum radio-frequency output power is 20 dBm, and the noise factorof the receiving machine is less than 9 dB.

Description

Technical field [0001] The invention relates to a multi-mode and multi-band radio frequency airborne picocell communication system based on software radio, and belongs to the technical field of a radio frequency front-end subsystem applicable to current wireless communication services. Background technique [0002] With the continuous development of wireless communication technology and increasing social demand, wireless communications including mobile phones, wireless paging, satellite communications, etc. have been more and more widely popularized and applied, and have shown broad market prospects. From a global perspective, the annual increase and growth rate of wireless communication users have continued to increase significantly year by year, and wireless communication has entered a stage of large-scale development. The RF front-end system is an important part of the wireless communication transceiver system. It is generally used to down-convert the received RF signal to an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04W84/12H04W84/10
Inventor 周健义王彦炜晋石磊赵腾洪伟
Owner SOUTHEAST UNIV
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