在雷力衰減通道上差分振幅相位移鍵調變訊號使用切換停留結合接收之研究

Abstract

在此篇論文當中，我們將討論差分振幅相位移鍵調變(Differentially Amplitude Phase Shift Keying,簡稱DAPSK)訊號在經過雷力衰減通道(Rayleigh fading channels)後，使用切換停留結合接收方式的接收器來解調訊號之研究。 本篇論文的研究方向著重於在接收端該如何接收並解調信號，尤其是針對接收訊號的訊噪比(signal to noise ratio,簡稱SNR)，在接收端根據不同的訊噪比來調整切換門檻(switching threshold)以得到最小的錯誤率。

In this thesis, we will study the performance of DAPSK signals when transmitting over Rayleigh fading channels with switch and stay combining reception. The key point of this thesis is how to receive and demodulate the received signals. For different signal to noise ratio, especially, the receiver how to adjust the switching threshold to achieve minimum bit error rate.