通信系统中实现残留边带调制，用matlab实现。调制解调过程-Communication systems to achieve VSB modulation, with the realization of matlab. The process of modulation and demodulation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001639s ]
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:0.072133s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001049s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001133s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001032s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003008s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000831s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003730s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015391s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001518s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 5344 [ RunTime:0.014446s ]
