oracl 和db2 常用语法比较： 1、取前N条记录 Oracle：Select * from TableName where rownum <= N; DB2：Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle：Select sysdate from dual; DB2：Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle：Select
MIMO系统中的智能天线技术与空时码快速解码的研究杭州屯f科技大学硕士学位论文
ABSTRACT
With the development of communication technology and the growing demand for a variety of
applications, communications networks are undergoing great change. It is can be expected that
mobile communicati
