| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase spectral efficiency of a cellular single frequency network using Multiple-In Multiple-Out (MIMO) techniques. <P>SOLUTION: Multiple data streams, in one data stream per set of transmit antennas, are transmitted from multiple cells. A mapping of the streams to the antenna sets is permuted temporally. In this way, user equipment devices (UEs 140) at cell edges benefit from the MIMO, and UEs near cell centers benefit from a high carrier-to-interference (C/I) ratio of a signal. Each stream is concurrently transmitted on a base layer of a hierarchically modulated signal from one set, and on an enhancement layer of the hierarchically modulated signal from another set. A mapping of the sets to the streams is permuted temporally. The UEs at the cell edges benefit from the MIMO, and the UEs near the cell centers benefit from the high C/I to decode both streams from the base and enhancement layers. <P>COPYRIGHT: (C)2012,JPO&INPIT |
