DC compensation receiver and signal receiving method based on sequence quadrature down-conversion

Abstract

The invention discloses a DC compensation receiver based on sequence quadrature down-conversion, including a low-noise amplifier, a sequence quadrature down-converter, an A / D converter, a baseband clock signal generator, a two-frequency divider and signal demodulation The serial quadrature down-converter includes a local oscillator, a phase switching circuit, a mixer and a low-pass filter connected in sequence, the input of the low-noise amplifier is connected to the antenna, and the output of the low-noise amplifier is connected to the mixer The input end of the A / D converter is connected with the output end of the low-pass filter and the output end of the baseband clock signal generator, and the phase switching circuit is connected with the output end of the baseband clock signal generator; the invention also discloses A DC compensation signal receiving method based on sequence quadrature down-conversion is presented. The invention is novel and reasonable in design, reduces the cost, can maintain highly consistent performance indexes of the in-phase component and the quadrature component after down-conversion, can eliminate the DC bias problem, and has strong practicability.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a DC compensation receiver and a signal receiving method based on sequence quadrature down-conversion. Background technique [0002] The existing commercial mobile communication system is constantly developing towards broadband and high speed, which is closely related to the unprecedented prosperity of the current mobile communication market. People are increasingly demanding higher data rates for wireless communications. The 4th generation mobile communication system has been commercialized on a large scale, and the 5th generation mobile communication system is being extensively and deeply developed. However, in some other special application scenarios, the wireless communication system does not aim at the speed. [0003] For example: the development of the Internet of Things requires a large number of transceiver nodes, and in many cases does not re...

AI Technical Summary

Problems solved by technology

The above-mentioned methods all consider the in-phase and quadrature components for combined compensation. The compensation method leads to an overly complex circuit, increased power consumption and cost, and is affected by the inconsistent performance of the two branches. The compensation effect is limited.

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