This paper presents a 40-Gbit/s time-division multiplexing (TDM) system prototype based on InP HEMT digital IC technologies. High-output power photodiode directly drives the digital IC and achieves high-receiver sensitivity. Four-channel 40-Gbit/s wavelength-division multiplexing (WDM) transmission is successfully performed.
This paper presents a noise-robust, fast-convergence echo canceller and its implementation on a multimedia RISC (Reduced Instruction Set Computer). Faster convergence is achieved by introducing an improved noise power estimator for step-size control. This echo canceller has been implemented on V830 multimedia embedded RISC and has been integrated into a car… (More)