Zero intermediate frequency receiving device and method
A technology of receiving device and zero intermediate frequency, applied in the field of zero intermediate frequency receiving device, can solve the problems of complex solution, narrow receiver bandwidth, unable to meet the requirements of radio monitoring, etc., and achieve the effect of less complexity, wide receiving frequency band and low cost
Active Publication Date: 2021-07-30
ARMY ENG UNIV OF PLA
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Problems solved by technology
[0003] (1) Using quadrature demodulation technology, the I and Q signals are directly output, and there is a DC component, which needs to be processed in the signal processing circuit, and the scheme is complicated
[0004] (2) At present, the bandwidth of most receivers is relatively narrow, usually several hundred MHz, which cannot meet the requirements of radio monitoring
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[0043] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0044] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather...
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The invention discloses a zero intermediate frequency receiving device and method. The device comprises a first combining switch, a first shunt switch, a plurality of filters, a second combining switch, a second combining switch, a first amplifier, a first amplifier, a first programmable attenuator, a second amplifier, a first power divider, a first integrated phase-locked loop, a first quadrature demodulator, a second quadrature demodulator, a first relay, a second relay,a second power divider, a third power divider, a first filter, a second filter, a third filter, a fourth filter, a first analog-to-digital converter, a second analog-to-digital converter, a CPLD, a first digital-to-analog converter, a second digital-to-analog converter, a first operational amplifier and a second operational amplifier. According to the invention, the orthogonal demodulation and direct current elimination technology is used, the complexity is small, the reliability is high, the cost is low, the stability is good, the receiving frequency band is wide, the anti-interference capability is strong, and the direct-current component can be effectively eliminated.
Description
technical field [0001] The invention relates to the field of radio frequency broadband reception, in particular to a zero-IF reception device and method. Background technique [0002] In the current zero-IF receiver machine, the orthogonal demodulation technology is adopted, and the receiving bandwidth is relatively narrow, usually several hundred MHz, and there are mainly the following deficiencies: [0003] (1) Using quadrature demodulation technology, the I and Q signals are directly output, and there is a DC component, which needs to be processed in the signal processing circuit, and the scheme is complicated. [0004] (2) At present, the bandwidth of most receivers is relatively narrow, usually hundreds of MHz, which cannot meet the requirements of radio monitoring. Contents of the invention [0005] The purpose of the present invention is to provide a zero-IF receiving device and method, aiming to solve the zero-IF receiver that can eliminate the DC components in th...
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IPC IPC(8): H04B1/30H04B1/12H04B1/00
CPCH04B1/30H04B1/123H04B1/0017H04B1/0014
Inventor 梁吉申青山良方旭
Owner ARMY ENG UNIV OF PLA