Title :
Crosstalk cancellation on satellite links in the Ka-band
Author :
Jakoby, R. ; Rucker, F.
Author_Institution :
Res. Center, Deutsche Bundespost Telekom, Darmstadt, Germany
Abstract :
Frequency reuse in satellite communications by means of dual-polarized systems imposes stringent copolar attenuation (CPA) and crosspolar discrimination (XPD) margin requirements. Rain and ice-induced depolarization can cause unacceptable cross coupling. To reduce this effect, cancellation techniques have been applied. When ice depolarization is dominant, a very simple cancellation network affecting only the differential phase shift (DPS) can restore adequate isolation. The improvements in XPD or system availability are presented for 20/30 GHz, where the up-link XPD was precompensated by using frequency-scaling relationships of DPS. Hence, this cancellation technique needs only the information of DPS from the down-link.<>
Keywords :
crosstalk; electromagnetic wave polarisation; frequency allocation; ice; interference suppression; microwave propagation; rain; satellite communication; satellite links; telecommunication network reliability; tropospheric electromagnetic wave propagation; 20 GHz; 30 GHz; Ka-band; SHF; cancellation network; copolar attenuation; crosspolar discrimination; crosstalk cancellation; differential phase shift; down-link; dual-polarized systems; frequency reuse; frequency-scaling; ice depolarization; isolation; rain depolarization; satellite communications; satellite links; system availability; up-link; Atmospheric measurements; Attenuation; Crosstalk; Frequency; Ice; Phase measurement; Polarization; Rain; Satellite communication; Signal analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1994. AP-S. Digest
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-2009-3
DOI :
10.1109/APS.1994.407844
