ASIC-based spectrally efficient modulation for wireless wideband data transmission

摘要

Abstract: Wideband digital data transmissions supporting the 51.82 Mbps (STS-3), 155.52 Mbps (STS-3) and higher data transmission formats are contemplated for future terrestrial point-to-point and point-to multipoint microwave systems as exemplified by the MMDS, LMCS/LMDS and MVDS services, as well as for satellite systems. The traditional approach of using QPSK modulation with powerful error correcting codes will face a significant challenge in overcoming the technical difficulty of supporting the clock/symbol rates required at these data rates using cost effective CMOS processes, the wide bandwidth required for these data rates using QPSK. SiCOM has developed an ASIC chip set, that, in addition to shaped QPSK, will support 8-PSK and 16-QAM modulation formats on in-phase and quadrature channels with transmission rates to 155.52 Mbps (STS-3). !3