MULTICHANNEL RECEIVER

摘要

An embodiment of the disclosed multichannel receiver may use a single master clock to generate (i) the sampling-clock signal that sets the sampling rate of the receiver's ADC and (ii) multiple electrical local-oscillator signals that are used in various channels of the receiver's analog down-converter to translate to intermediate frequency the RF signals received on the receiver's array of antennas. The multichannel receiver may employ a plurality of interconnected frequency dividers configured to variously divide the master-clock frequency to generate the sampling-clock signal and the multiple local-oscillator signals in a manner that causes these signals to have different respective frequencies.

主权项

1. An apparatus comprising:
a plurality of mixers, each one of the plurality of mixers being configured to mix a respective one of a plurality of electrical radio-frequency (RF) signals and a respective one of a plurality of electrical local-oscillator (LO) signals to generate a respective one of a plurality of electrical intermediate-frequency (IF) signals, each electrical LO signal of the plurality of LO signals having a different frequency; an analog-to-digital converter (ADC) configured to convert the electrical IF signals into a corresponding digital IF signal carrying a sequence of discrete digital samples generated by the ADC at a sampling rate determined by a sampling-clock signal; and a plurality of frequency dividers configured to frequency divide a master-clock signal to generate the sampling-clock signal and the plurality of electrical LO signals of different frequencies.