Application of Memory-Based Digital Filtering to High-Speed Digital Radio

Abstract

Memory‐based digital filtering is considered in the context of high‐speed (greater than 15 Mbaud) radio systems, where it finds application as an accurate and rapid approach to synthesizing band‐limited data signals for transmission over Nyquist channels. Following brief comments regarding the basic circuit architecture, feasibility models for 16‐and 64‐QAM 90‐Mb/s operation are experimentally evaluated. Performance is found to be consistent with digital radio objectives and superior to sophisticated analog designs.