| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide soft handoff with interference cancellation in a wireless frequency-hopping communication system. <P>SOLUTION: Each sector concurrently supports "non-handoff" users and "soft-handoff" users. A non-handoff user communicates with only one sector and is assigned with information channels by the user's own sector. The soft-handoff user communicates with multiple sectors simultaneously and is assigned with information channels by the user's own "serving" sectors. For each sector, information channels assigned to multiple non-handoff users are orthogonal to one another and not always orthogonal to the multiple information channels assigned to the multiple soft-handoff users. Each sector recovers data transmissions from the non-handoff users and estimates interference made by the multiple non-handoff users and cancels the interference. Each sector further processes signals of its own, which have been processed to cancel the interference, so that the data transmissions from the multiple soft-handoff users may be recovered. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
