A Shortened Impulse Response Filter (SIRF) Scheme for Cost-Effective Echo Canceller Design of 10GBase-T Ethernet System

IEEE 802.3 an task force is now developing new Ethernet standard-10GBase-T. Currently, most of the 10Gbps Ethernet is developed with fiber medium due to the fiber high bandwidth. However, the fiber and optical device cost are still too high to be popular. Therefore, our goal is to lower the 10GBase-T transceiver cost. We propose two new low cost 10GBase-T transceiver architectures. One is echo shortening. A shortened impulse response filter (SIRF) is used to shorten the echo impulse response to reduce the echo canceller cost. The other is joint shortening. The SIRF is used to jointly shorten impulse response of echo and NEXT. Moreover, compare with the conventional architecture, the cost saving of the proposed echo shortening and joint shortening architecture is 12% and 35% respectively