High-rate data transmission procedure via digital radio channel - providing multipath propagation compensation by decision feedback equaliser of correctly phased and weighted antenna signal combination

摘要

Each signal path from an antenna tuner to the common decision feedback equaliser (DFE) has its own channel matched filter (CMF) which optimises the signal/noise ratio at the instants of sampling. The required channel impulse response is estimated with the aid of a training sequence transmitted in the middle of the data frame, and the estimate is tracked to temporal channel variations. After demodulation the multipath fading is reduced by temporal and spatial diversity measures. USE/ADVANTAGE - Esp. in cellular mobile radiocommunication, analogue FM broadcasting can be superseded by digital within same VHF/UHF channel bandwidth to receivers moving at up to 250 km/h.