通信系统中常用的多进制数字相位调制的源代码 并结合ofdm系统 加入了相应的保护前缀(cp)和导频序列 应用于有关ofdm的信道估计等系统-Communication systems commonly used in multi-band digital phase modulation of the source code and combine OFDM system by adding a prefix corresponding protection (cp) and the pilot sequence used in the relevant channel estimation of OFDM systems
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.227449s ]
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:0.103276s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.096300s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002109s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002479s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003930s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002062s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003544s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016000s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002425s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 247234 [ RunTime:0.001319s ]