公开(公告)号：AT442707T

公开(公告)日：2009-09-15

申请号：AT03029648

申请日：2003-12-22

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： RYU JOON-GYU ,  JEONG HOON ,  LEE HO-JIN ,  OH DEOCK-GIL

IPC: H04L27/34 ,  H03D7/16 ,  H04B1/04 ,  H04B1/30 ,  H04B1/713

Abstract: Disclosed is a frequency hopping system for converting frequencies of signals into RF (radio frequency) signals, which comprises: a frequency hopper (200) for outputting signals with temporarily varied frequencies according to a predetermined pattern; a fixed PLL (phase locked loop) unit (500) for outputting frequency-fixed signals; a mixer (400) for mixing the output signals of the frequency hopper and the fixed PLL unit, and outputting frequency-hopped local signals; and a modulator (100) for receiving I and Q (in-phase and quadrature-phase) signals from a baseband device, synthesizing the I and Q signals with the frequency-hopped local signals, combining the two synthesized signals, and outputting RF signals.

公开(公告)号：DE60329158D1

公开(公告)日：2009-10-22

申请号：DE60329158

申请日：2003-12-22

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： RYU JOON-GYU ,  JEONG HOON ,  LEE HO-JIN ,  OH DEOCK-GIL

IPC: H04L27/34 ,  H03D7/16 ,  H04B1/04 ,  H04B1/30 ,  H04B1/713

Abstract: Disclosed is a frequency hopping system for converting frequencies of signals into RF (radio frequency) signals, which comprises: a frequency hopper (200) for outputting signals with temporarily varied frequencies according to a predetermined pattern; a fixed PLL (phase locked loop) unit (500) for outputting frequency-fixed signals; a mixer (400) for mixing the output signals of the frequency hopper and the fixed PLL unit, and outputting frequency-hopped local signals; and a modulator (100) for receiving I and Q (in-phase and quadrature-phase) signals from a baseband device, synthesizing the I and Q signals with the frequency-hopped local signals, combining the two synthesized signals, and outputting RF signals.