Orthogonal frequency division multiplexing (OFDM) self-adaption feedforward linear power amplifying device
A technology of amplifying device and power amplifying module, which is applied to power amplifiers, improving amplifiers to reduce nonlinear distortion, etc., can solve the problems of cellular base station signal blind area coverage, etc., and achieve the goal of improving system efficacy, high efficiency, and suppressing nonlinear distortion products. Effect
Active Publication Date: 2015-06-10
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an OFDM adaptive feedforward linear power amplification device, which is used to solve the problems of long-distance signal transmission in high-speed wireless TD signals and blind area coverage of cellular base station signals.
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[0037]Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0038] see Figure 1 to Figure 4 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily d...
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The invention provides an orthogonal frequency division multiplexing (OFDM) self-adaption feedforward linear power amplifying device which comprises a power amplifying module, a self-adaption control module, a digital address translation table (ATT) module, a standing wave protection module and a linear power amplifier control module, wherein the self-adaption control module carries out vector adjustment on radio-frequency signals according to changes of exterior drive signals to ensure that a power amplifier can carry out stable linear amplifying, the digital ATT module carries out power output control on amplifying signals according to a preset adjustable range value, after the standing wave protection module carries out attenuation processing on a detected reverse power value, the standing wave protection module carries out detection on the reserve power value, a detected direct voltage and a preset threshold voltage are compared through the standing wave protection module so as to protect the power amplifying module. According to the device, a radio-frequency power amplifier is required to have high efficiency and smallest adjacent channel interference, spectrum resources are fully utilized due to good linear transmission performance, nonlinear distortion products are restricted effectively in a wide frequency band, the device is more suitable for requirements of dynamic channel allocation, and the problems of long-distance signal transmission of high-speed wireless time division (TD) signals, blind area coverage which exists in signals of a cellular base station, and the like are solved.
Description
technical field [0001] The invention relates to a medium-high-speed wireless sensor network communication technology, in particular to an OFDM self-adaptive feedforward linear power amplification device applied in a medium-high-speed sensor network. Background technique [0002] With the rapid development of communication and information technology, the development trend of human access to information is moving from fixed to mobile, from voice to multimedia. At present, there are mainly three network architectures that can provide multimedia content to a large number of audiences in a mobile environment: mobile communication network (WiMAX), based on OFDM technology (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing technology), two-way transmission, operating frequency 2.3GHz, 2.5GHz, 3.5GHz, 5.8GHz; wireless local area network (WLAN), based on DSSS technology, two-way transmission, working frequency is 2.4GHz, 5.8GHz; terrestrial digita...
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IPC IPC(8): H03F1/32H03F3/20
Inventor 李伟高丹仵元元田文强王营冠
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI