发明名称 RADIO COMMUNICATION EQUIPMENT
摘要 <p><P>PROBLEM TO BE SOLVED: To eliminate a DC offset by performing frequency conversion of self-mixing when converting a multiband OFDM_UWB (orthogonal frequency division multiplexing_ultra wideband) signal by a direct conversion method. <P>SOLUTION: Capacitors #1, #2 and #3 are prepared for each of frequency bands #1, #2 and #3 to be hopped. The capacitors are switched in synchronization with frequency hopping, for example, the capacitor #1 holds electric charge just before frequency hopping from the frequency band #1 to another frequency band #2, and when hopping is performed to the frequency band #1 again, the capacitor #1 continues step response. Thus, the discharge and charge of the capacitor #1 are eliminated to makes the capacitor #1 settle in a steady state soon. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p>
申请公布号 JP2006203686(A) 申请公布日期 2006.08.03
申请号 JP20050014608 申请日期 2005.01.21
申请人 SONY CORP 发明人 IIDA YUKIO
分类号 H04J11/00;H04B1/713;H04J13/00 主分类号 H04J11/00
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