| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide techniques to manage interference for broadcast services and soft handoff in a wireless frequency hopping communication system (e.g., an OFDMA system). <P>SOLUTION: In a first scheme, an FH function (r, T) is used for soft-handoff users, an FH function (k, T) is used for users not in soft handoff in each sector, and the FH function (k, T) is modified to be orthogonal to the FH function (f) (r, T), if and when it becomes necessary. In a second scheme, the FH function (r, T) used for soft-handoff users is defined to be orthogonal to or have low correlation with the FH function (k, T) used for users not in soft handoff in each sector Si, so that the modification of the FH function (k, T) is not needed. The FH function (k, T) for each sector is defined so as to be pseudo-random, with respect to the FH functions (k, T) for other sectors. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
