Performance analysis and simulation of pi/4 DQPSK system with diversity combining schemes in wireless communication channel
碩士 === 國立中央大學 === 電機工程學系 === 86 === The performance of diversity combining technique with pi/4 differential quadrature phase shift keying is investigated in wireless communication channel. The transmission system model consists of the trans...
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| Format: | Others |
| Language: | zh-TW |
| Online Access: | http://ndltd.ncl.edu.tw/handle/91675195763929620171 |
| Summary: | 碩士 === 國立中央大學 === 電機工程學系 === 86 === The performance of diversity combining technique with pi/4
differential quadrature phase shift keying is investigated in
wireless communication channel. The transmission system model
consists of the transmitter with a raised cosine filter and the
receiver with diversity. The channel is modeled as frequency
selective fast Rayleigh or Rician fading. The diversity
combining with differential detection is applied to improve the
system performance and to reduce the hardware complexity. A
method to cascade multiple stages with various combining schemes
will more effectively combine the received diversity branches.
The simulated and analyzed outcomes are obtained to present the
performance of variable numbers of branches with different
combining schemes. The numerical results indicate the details of
the system performance in fading environment attenuated by
Doppler effect and delay spread. The multiple stage combining
shows benefits to have comparative performance while gives the
flexible choices of hardware complexity order in each stage.
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