公开(公告)号：EP0936766A4

公开(公告)日：2005-01-26

申请号：EP98929837

申请日：1998-07-03

申请人： TOSHIBA KK

发明人： SUENAGA MASASHI ,  OKA MASARU ,  KOISHI YOICHI ,  FUJIMORI YUKIYOSHI ,  KIKUCHI HIDEO

IPC分类号： H04B1/711 ,  H04B7/185 ,  H04J13/10 ,  H04W84/06 ,  H04J13/00 ,  H04B7/15 ,  H04B7/216

CPC分类号： H04B7/18526

摘要： Channel selection at a broadcast receiver for receiving multiplexed broadcast signals is readily and quickly done with good response, improving the convenience of the user. At ground broadcasting stations (BC1, BC2), the spectrum-spreading codes for the channels are made in phase, then the broadcast signals of the channels are code-division multiplexed, and the broadcast signals are transmitted through a geostationary satellite (SAT) to broadcast receivers (MS) in the service area. Alternatively, at a geostationary satellite (SAT), the differences among the spectrum-spreading codes for the channels of CDM broadcast signals transmitted from ground broadcasting stations (BC1, BC2) are found, the spectrum-spreading codes are made in phase based on the differences, and the broadcast signals are transmitted to broadcast receivers (MS).