| 摘要 |
<P>PROBLEM TO BE SOLVED: To appropriately judge a period corresponding to a guard time period in a TDMA method and reliably determine a DC offset value that occurs in a transmitting and receiving apparatus to reduce degradation of error-rate characteristics in a packet exchange system using a CSMA/CA method. <P>SOLUTION: After transmission is completed, an electric power supply to an analog circuit 1 and an orthogonal detection circuit 2 is off, and a carrier detection signal C2 is compulsorily on to immediately determine a DC offset value that occurs within the transmitting and receiving apparatus 100. After reception is completed, SIFS time passes, a transmission enable signal (transmission status) C1 and the carrier detection signal C2 are checked. In the case of neither transmitting nor carrier detecting, a DC offset value is determined within the transmitting and receiving apparatus 100. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
