关键词: 循环延迟分集, 多媒体广播组播业务, 公用导频

Abstract:

Based on the dilemma of delay value in cyclic delay diversity (CDD), a new transmission scheme based on CDD and its channel estimation method is presented. Delay values are different among symbols with pilot. Those symbols with pilot and symbols with data are different too. With the new channel estimation algorithm, the cyclic delay diversity is robust to the delay value.

Key words: cyclic delay diversity, multimedia broadcast and multicast service, common pilot