Subsampling receiver using interstage off-chip RF band pass filter

摘要

The inventive concept relates to a wireless communication receiver. The wireless communication receiver includes a second off-chip RF filter, an RF-to-digital converter and a digital pre-processor processing a signal converted into a digital. The RF-to-digital converter converts an RF signal being received into a digital signal of DC frequency band or intermediate frequency band and has a dynamic range that can process a wanted RF band signal and unwanted signals near to the wanted RF band signal. The digital pre-processor digitally controls a signal gain to transmit it to a modulator/demodulator.

主权项

1. A receiver comprising:
an RF front end portion band pass-filtering an analog signal and amplifying the band-passed signal to attenuate a noise and an interference signal other than the band-passed signal; an analog-digital converting portion that performs a sub-sampling on a carrier frequency of a wanted signal band according to clock signals, performs an over sampling on the wanted signal band according to the clock signals, converts an analog signal output from the RF front end portion into a digital signal of a DC frequency band or an intermediate frequency band, and has an input signal range capable of processing a wanted signal and unwanted signals near to the wanted signal; a signal processing portion digitally pre-processing and demodulating a digital signal output from the analog-digital converting portion; and a detection controlling portion detecting a mismatch between I/Q channel data of the digital signal output from the signal processing portion and controlling phases of the clock signals.