LTE(Long Term Evolution)系统中采用许多增强型的技术来提高系统性能，使系统相对于以往系统具有更高的复杂性。如何对采用LTE技术的无线通信系统建模与仿真将是一个有意义的问题。此外，一般的链路级仿真只是简单的点到点系统评估，与实际的多小区，多用户，多业务的系统有很大差别，因此需要用系统级仿真来评估实际系统的性能。附件是一套LTE系统仿真matlab源码。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001337s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.092553s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001201s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001896s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001276s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003647s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001084s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003192s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014751s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001340s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 337992 [ RunTime:0.004109s ]
