A powerful 13-tap ATDE and XPIC implemented on one chip for co-channel digital radio system

The growing demand for high capacity transmission in digital radio systems (DRS) has led to the adoption of a highly spectral efficient system comprising cochannel operation and multilevel QAM. Due to the vulnerability of such a system to the channel conditions, great efforts have been made on counteracting multipath fading and depolarization. The authors propose a powerful multitask chip with 150 K gate array for DRS. This chip was implemented with state of the art 0.6 μ HCMOS technology and was designed to be used not only as an equalizer for multipath fading and a canceller for cochannel operation, but also as a digital filter for pulse shaping in modems using up to 1024-QAM or TCM. The performance of cochannel of 64-QAM DRS combined with digital slope equalizer is presented