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International Conference of China Communication and Technology (ICCCT 2010 E-BOOK)

Nan'ning,China,10.9-10.10,2010

ISBN: 978-1-935068-52-5 Scientific Research Publishing, USA

E-Book 454pp Pub. Date: October 2010

Category: Computer Science & Communications

Price: $80

Title: A New Method of the DPSK Modulation and Demodulation at Multi-Channel Rate in Satellite System
Source: International Conference of China Communication and Technology (ICCCT 2010 E-BOOK) (pp 232-235)
Author(s): Shi-jun Xie, Nanjing Telecommunication Technology Research Institute of CESEC, Nanjing, China
Rui-min Lu, Nanjing Telecommunication Technology Research Institute of CESEC, Nanjing, China
Abstract: In the interest of the need of the different user of the satellite TDMA system, the multi-channel rate signals become the TDM frames. Because of the difference of signal rate at each frame, the matching filters have the very much difference delays in the DPSK modulation and demodulation, which affects strongly the demodulation of TDM frames. The paper infers a new method for the multi-channel rate modulation and demodulation. It’s that repeating encode for the low channel rate, in order to use the same matching filter with the high rate. This method not only resolves the influence of the delay of the matching filter, but also ensures the performance of the demodulation. It is validated by the computer emulator and the fact system.
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