Transmitting diversity circuit for TDMA radio unit

Details Transmitting diversity circuit for TDMA radio unit Transmitting diversity circuit for TDMA radio unit

1998-01-23

2000-10-03

Urban, Edward F.

Telecommunications

Transmitter

Diversity

455562, 455103, 375299, H04B 702

Patent

active

061284769

ABSTRACT:
Disclosed is a transmitting diversity circuit for a TDMA radio unit which has: a plurality of antennas; a plurality of transmitting circuits; a plurality of receiving circuits; a first switch which is connected with one of the plurality of transmitting circuits and selects one of the plurality of antennas; a second switch which is connected with the first switch and selects the one or the other of the plurality of transmitting circuits; a third switch which is connected with the second switch and one or more of the plurality of receiving circuits and selects one of the plurality of transmitting circuits or the one or more of the plurality of receiving circuits; a judging circuit which controls the switching of the first and second switches according to a level of received field strength to be detected by the receiving circuit connected with the third switch; wherein the one of the plurality of transmitting circuits is connected through the first to third switches with the selected one of the plurality of antennas.

REFERENCES:
patent: 5390366 (1995-02-01), Kasugai
patent: 5448752 (1995-09-01), Mabey
patent: 5625627 (1997-04-01), Ishi
patent: 5844632 (1998-12-01), Kishigami et al.
patent: 5991613 (1999-11-01), Euscher et al.
patent: 5999830 (1999-12-01), Taniguchi et al.
patent: 6006075 (1999-12-01), Smith et al.

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