A zero intermediate frequency receiving device and method

Abstract

The invention discloses a zero-IF receiving device and method. The device comprises: a first combiner switch, a first branch switch, a plurality of filters, a second combiner switch, a second combiner switch, and a first amplifier , the first amplifier, the first programmable attenuator, the second amplifier, the first power divider, the first integrated phase-locked loop, the first quadrature demodulator, the second quadrature demodulator, the first relay, the second relay, second power divider, third power divider, first filter, second filter, third filter, fourth filter, first analog-to-digital converter, second analog-to-digital converter, CPLD, The first digital-to-analog converter, the second digital-to-analog converter, the first operational amplifier, and the second operational amplifier, the present invention adopts quadrature demodulation and DC cancellation technology, with low complexity, high reliability, low cost and good stability , the receiving frequency is wide, the anti-interference ability is strong, and the DC component can be effectively eliminated.

Description

technical field [0001] The present invention relates to the field of radio frequency broadband reception, in particular to a zero-IF receiving device and method. Background technique [0002] In the current zero-IF receiver, the quadrature demodulation technology is used, and the receiving bandwidth is narrow, usually several hundred MHz, and mainly has the following shortcomings: [0003] (1) Using the quadrature demodulation technology, the I and Q signals are directly output, and there are DC components, which need to be processed in the signal processing circuit, and the scheme is complicated. [0004] (2) At present, most receivers have a narrow bandwidth, usually several hundred MHz, which cannot meet the requirements of radio monitoring. SUMMARY OF THE INVENTION [0005] The purpose of the present invention is to provide a zero-IF receiving device and method, aiming at solving the zero-IF receiver which can eliminate the DC components in I and Q signals and can be ...

AI Technical Summary

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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