US 12,040,887 B2
Optical transmission device based on direct-sequence-spread-spectrum time-division-multiple-access and method thereof
Da Feng, Changsha (CN); Junwei Yu, Changsha (CN); and Weijin Jiang, Changsha (CN)
Assigned to Hunan University of Technology and Business, Changsha (CN)
Appl. No. 17/799,912
Filed by Hunan University of Technology and Business, Changsha (CN)
PCT Filed Aug. 3, 2021, PCT No. PCT/CN2021/110309
§ 371(c)(1), (2) Date Oct. 6, 2022,
PCT Pub. No. WO2022/205721, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 202110360706.9 (CN), filed on Apr. 2, 2021.
Prior Publication US 2024/0187119 A1, Jun. 6, 2024
Int. Cl. H04J 3/16 (2006.01); H04B 1/7073 (2011.01); H04B 10/516 (2013.01)
CPC H04J 3/1652 (2013.01) [H04B 1/7073 (2013.01); H04B 10/516 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical transmission device based on direct-sequence-spread-spectrum time-division-multiple-access, comprising a signal transmitting module and a signal receiving module;
wherein the signal transmitting module is connected with the signal receiving module by optical fibers;
the signal transmitting module is used for receiving an external data sequence signal, encoding the external data sequence signal into a direct-sequence-spread-spectrum time-division-multiple-access electric signal, and modulating the direct-sequence-spread-spectrum time-division-multiple-access electric signal into a direct-sequence-spread-spectrum time-division-multiple-access optical signal;
the signal receiving module is used for receiving the direct-sequence-spread-spectrum time-division-multiple-access optical signal and sequentially performing photoelectric conversion, analog despreading, analog-digital conversion, and clock recovery to obtain the external data sequence signal;
the signal transmitting module comprises a signal modulation sub-module, and the signal modulation sub-module is a raised cosine encoding modulation sub-module or a modified duobinary encoding modulation sub-module, wherein the raised cosine encoding modulation sub-module is used for receiving the external data sequence signal and sequentially performing signal spectrum spreading and raised cosine encoding to obtain a raised cosine electric signal;
the modified duobinary encoding modulation sub-module is used for receiving the external data sequence signal and sequentially performing signal spectrum spreading, positive and negative separation, and modified duobinary encoding to obtain a modified duobinary differential electric signal.