脈衝振幅調變於高速串列解串列系統中眼圖分析與等化設計

Abstract

針對網路交換機在高速串列解串列系統中的資料處理量規模增大，處理速率也增加，逐漸有PAM4取代應用於系統中。本論文提出可以透過PAM4最劣訊號列分析法，可以無需輸入長串的偽亂數二進位數列直接得到系統眼圖。其次，則提出眼圖優化演算法，透過PAM4峰值失真分析方法可選擇最佳有限脈衝響應濾波器係數。最後計算出NRZ與PAM4加上有限脈衝響應濾波器後，在系統中的佈線範圍，可以有效地辨別兩者編碼方式在系統中佈線的優勢區域。

The pursuit of larger data volume and higher switching speed in networking has emerges the 4-level pulse-amplitude modulation (PAM4) for the SerDes systems. In this thesis, the worst-case bits pattern method is proposed to derive the worst-case eye diagram for PAM4 without large PRBS simulation. Then, an optimization algorithm is established to search for the best finite impulse response (FIR) filter coefficients based on PAM4 extended peak distortion analysis (PDA) to improve PAM4 eye diagram efficiently. Finally, it is applied to calculate the suitable layout region for NRZ and PAM4 respectively, thereby addressing the preference zone for NRZ and PAM4.