自己写的一个OFDM发送接收的程序，注释详尽，适合初学者，有图形验证。可实现IFFT过采样，以及prefix-Writing their own to send an OFDM reception process, detailed notes, suitable for beginners, there is graphical verification. Can achieve over-sampling IFFT and prefix
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000940s ]
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:0.066088s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001055s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001131s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001003s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003216s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000882s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003693s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014935s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001216s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 154005 [ RunTime:0.022779s ]
