High efficient multi-path digital down converter system

• Main Authors: GUO FANG, CHEN CHAOGUANG
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2012
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention relates to a high efficient multi-path digital down converter system, comprising a signal input terminal X(n) and a signal output terminal Y(n), wherein the signal input terminal X(n) isdivided into M independent digital down conversion branches by M-1 delayers, each digital down conversion branch comprises a decimator with extraction factor, a multi-phase branch filter constructedby H(z) expression of a M phase digital filter and the input terminal of the decimator of each operation branch is coupled with the signal input terminal X(n) and the output terminal of the multi-phase branch filter of each operation branch is coupled with a fast Fourier transform module (FFT) and the fast Fourier transform module (FFT) respectively summarizing the real-part sequences of M post-filter complexes sequences of each operation branch, summarizing the imaginary-part sequences to obtain M output signals Y(n). The high efficient multi-path digital down converter system saves the hardware document and increases