Title :
Interference effects on Space Station Freedom and Space Shuttle Orbiter Ku-band single access return links
Author :
Kwon, Hyuck ; Loh, Y. ; Tu, Kwel ; GADD, WILLIAM
Author_Institution :
Lockheed Eng. & Sci. Co., Houston, TX, USA
fDate :
30 Sep-3 Oct 1990
Abstract :
In a Ku-band single access return (KSAR) communication link via the tracking and data relay satellite system (TDRSS), the interference between spacecraft can be discriminated by opposite antenna polarizations, pseudo-noise code, and by TDRSS antenna beam pointing. For the Space Station Freedom (SSF) KSAR and the Space Shuttle Orbiter (SSO) KSAR links, the pseudo-noise coding technique is not exploited. In addition, the two KSAR links use the same carrier frequency. Therefore, if the SSF and SSO are in close proximity, it is expected that mutual interference will be significant. Mutual interference effects on the SSO-KSAR I-channel and the SSF-KSAR links are analytically derived and compared to the simulation results. For the analysis, the channel is assumed ideally bandlimited and linear. It is demonstrated that a simplified (linear bandlimited channel) analytical approach yields results of adequate accuracy in an estimation of the signal degradation by interference
Keywords :
microwave links; radiofrequency interference; satellite relay systems; space communication links; tracking systems; KSAR; Ku-band single access return links; Space Shuttle Orbiter; Space Station Freedom; TDRSS; microwave links; mutual interference; space communication links; spacecraft; tracking and data relay satellite system; Analytical models; Artificial satellites; Frequency; Interference; Polarization; Relays; Satellite antennas; Space shuttles; Space stations; Space vehicles;
Conference_Titel :
Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/MILCOM.1990.117377
