Space diversity TDMA receiver.

摘要

In a space diversity receiver, multiple signal paths are connected respectively to antennas (10a, 10b) for multipath reception. Each signal path includes a digital demodulator (11a, 11b) coupled to the antenna and an impulse response detector (15a, 15b) or autocorrelator connected to the demodulator for deriving a channel impulse response of each one of the multiple paths. A maximum response detector (16a, 16b) is connected to each impulse response detector for detecting equalizable delay components which give a maximum response value and a nonequalizable delay components. A power ratio of the nonequalizable delay components to the equalizable delay components is derived for each signal path and a minimum value of the power ratios is determined and one of the signal paths in which the minimum value is detected is selected. The output signal of the demodulator of the selected signal path is applied to one input of an equalizer, or a maximum likelihood sequence estimator (23) and the equalizable delay components of the selected signal path are applied to a second input of the equalizer.