The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2013
Filed:
Nov. 15, 2006
Tao Tao, Beijing, CN;
Dong Bai, Beijing, CN;
Qihong GE, Beijing, CN;
Huishi Song, Beijing, CN;
Wen Chen, Beijing, CN;
Yibin Liang, Beijing, CN;
Qinghua Yang, Beijing, CN;
Lian Wang, Beijing, CN;
Qun LI, Beijing, CN;
Hongbing Shen, Beijing, CN;
Tao Tao, Beijing, CN;
Dong Bai, Beijing, CN;
Qihong Ge, Beijing, CN;
Huishi Song, Beijing, CN;
Wen Chen, Beijing, CN;
Yibin Liang, Beijing, CN;
Qinghua Yang, Beijing, CN;
Lian Wang, Beijing, CN;
Qun Li, Beijing, CN;
Hongbing Shen, Beijing, CN;
TIMI Technologies Co., Ltd., Beijing, CN;
Abstract
The present invention discloses a multi-carrier digital multimedia broadcast system and the digital information transmission method thereof. After RS encoding and byte interleaving, LDPC encoding, bit interleaving and constellation mapping to an upper layer of data streams in turn, the obtained data symbol is multiplexed with scattered pilots and continual pilots which include the system information to form an OFDM frequency domain symbol and scrambled; an OFDM time domain symbol is generated by IFFT transforming, and after inserted with the frame head to build a time slot, it is connected to form a signal frame of the physical layer; the signal frame of the physical layer is transmitted after being low-pass filtered and orthogonal upconverted. The system and method thereof provide wireless broadcast with high quality such as audio, video and multimedia data and the like for mobile, fixed and portable receivers, and can use the satellite transmission and terrestrial transmission method for transmitting. The method utilizes the LDPC OFDM scheme, and the system applies the microwave and large scale integrated circuit technologies while fulfills the needs for low cast and high performance.