Spectrally efficient and high capacity acknowledgement radio pag

Telecommunications – Transmitter and receiver at separate stations

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455 531, 455 511, H04B 700, H04Q 302

Patent

active

056258801

ABSTRACT:
An improved radio paging system providing automatic acknowledgment of message delivery, including a base station with spatially directive reception means and a pager capable of transmitting acknowledgment signals. The spatially directive reception means at the base station enhances the reception quality of the acknowledgment signals transmitted by the pager over that obtainable with conventional omnidirectional reception means, thereby compensating for the disparity in the base station and pager transmission powers.

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Friedlander et al., Direction Finding for Wideband Signals Using an Interpolated Array, 1991, IEEE 1058-6393/91, pp. 583-587.

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