US 12,278,685 B2
Repeater system
Martin Jacob, Rosenheim (DE); Alexander Seeor, Kolbermoor (DE); Maximilian Göttl, Frasdorf (DE); Frieso Damm, Rosenheim (DE); Andreas Tscherner, Prien am Chiemsee (DE); and Markus Mohr, Rosenheim (DE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/432,915
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 21, 2020, PCT No. PCT/EP2020/054663
§ 371(c)(1), (2) Date Aug. 21, 2021,
PCT Pub. No. WO2020/169823, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 10 2019 104 458.8 (DE), filed on Feb. 21, 2019.
Prior Publication US 2022/0200690 A1, Jun. 23, 2022
Int. Cl. H04B 7/155 (2006.01); H04B 1/00 (2006.01); H04B 7/024 (2017.01)
CPC H04B 7/15507 (2013.01) [H04B 1/0071 (2013.01); H04B 7/024 (2013.01); H04B 7/15528 (2013.01)] 19 Claims
OG exemplary drawing
 
17. A repeater system for forwarding radio signals in accordance with a Time Division Duplexing, TDD, mode of operation, the repeater system comprising:
a donor unit comprising a donor uplink antenna and a separate donor downlink antenna;
a service unit comprising a service uplink antenna and a separate service downlink antenna;
a donor downlink amplifier that is adjustable and a total amplification of the radio signal is adjusted by solely adjusting the donor downlink amplifier such that a sum of the total amplification between a donor downlink antenna and a service uplink antenna by the donor downlink amplifier is less than a decoupling between the donor uplink antenna and the service downlink antenna; and
at least one cable connecting the donor unit to the service unit over a distance between the donor unit and the service unit, wherein
for a downlink radio signal to be repeated in accordance with the TDD mode of operation:
(i) the donor unit is operable to receive the downlink radio signal via the donor downlink antenna and convert the downlink radio signal from a transmission frequency to a downlink intermediate frequency, IF, to thereby provide a downlink IF signal; and
(ii) the service unit is operable to receive the downlink IF signal from the donor unit via the at least one cable and convert the downlink IF signal to the transmission frequency to thereby provide a repeated downlink radio signal to the service downlink antenna; and
for an uplink radio signal to be repeated in accordance with the TDD mode of operation:
(i) the service unit is operable to receive the uplink radio signal via the service uplink antenna and convert the uplink radio signal from the transmission frequency to an uplink IF to thereby provide an uplink IF signal; and
(ii) the donor unit is operable to receive the uplink IF signal from the service unit via the at least one cable and convert the uplink IF signal to the transmission frequency to thereby provide a repeated uplink radio signal to the donor uplink antenna.