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A study on a continuous measurement of G/T for satellite broadcasting antenna systems

✍ Scribed by Chen Hu; Yasutaka Ogawa; Kiyohiko Itoh

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
337 KB
Volume
84
Category
Article
ISSN
8756-6621

No coin nor oath required. For personal study only.

✦ Synopsis

At Hokkaido University, a long-term continuous G/T measurement system has been developed. The method used to estimate the noise in the previous satellite broadcasting channel cannot be applied due to the fact that satellite broadcasting is not multichanneled. In this paper, a new method of estimation for the noise power is proposed. In this method, first the noise power in the channel to be measured (Channel 7) is derived as a first approximation by interpolation from the noise spectra in the band below Channel 5 and the one above Channel 11. A method shielding the satellite broadcasting wave (called pseudo eclipse) without disturbing the noise power spectrum is proposed. In this manner, the noise power spectrum can be measured in situations where the satellite broadcasting wave is not incident on the receiving antenna. The error (N bias ) contained in the first-order approximation obtained by the above interpolation can be derived. It is possible to improve the estimation accuracy by correcting N bias . With the noise estimation method proposed in this paper, G/T can be measured at high accuracy.

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