[TuB2] DSP-related Techniques

[TuB2-3] Real-time DSP for Adaptive FIR filters Based on LMS Algorithm

〇Masahiro Kikuta¹, Shohei Beppu², Tomoyuki Nagai³, Yasuo Saito¹, Takehiro Tsuritani², Koji Igarashi^2,3 (¹NEC Platforms, Ltd, Japan, ²KDDI Research Inc, Japan, ³Osaka Univ., Japan)

Keywords:coherent detection, real-time DSP, adaptive equalization

We implement real-time adaptive FIR filters followed by PLL and FLL with LMS algorithm. With FPGA-implemented real-time DPS, we conducted real-time bit-error ratio measurement of DPQPSK signals with the line bitrate of 45 Gbit/s.