By Yefim Gordon, Dmitriy Komissarov
First flown on December sixteen, 1957, the An-12 used to be a spinoff of the An-10 medium-haul airliner and had a greater destiny than its predecessor, virtually turning into as profitable because the Hercules. The An-12 was once in-built huge numbers and with various really good types to fill a mess of roles. This rugged airlifter has proved its worthy either in wrestle and in advertisement operations in the course of the global. The An-12 continues to be utilized by the Russian Air strength and diverse airways either in and out of doors the previous Soviet bloc to today. although lengthy out of creation in its domestic kingdom, the An-12 lives on in China because the Shaanxi Y8. This e-book covers each one recognized model and offers an in depth account of the An-12s complete provider occupation.
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Additional resources for Antonov An-12 The Soviet Hercules (Red Star vol. 33)
1980, "Adaptive Arrays". Y. 2. , 1981, "Adaptive Array Principles". IEE Electromagnetic Waves Series 11, Peter Peregrinus LTD. 3. , 1982, "Evaluation of sidelobe-canceller performance". Proc. IEE , 129,Pt. F1 52-58. 4. Giraudon, C, 1976, "Optimum antenna processing: a modular approach". Proc. of NATO Advanced Study Institute on signal processing and underwater acoustic, Porto Venere, Italy. 5. , 1978, "Adaptive cascate networks for deep nulling". "Trans IEEE on Antennas and Propagation, 26, 396-402.
The signals coming from the main and the auxiliary antennas, coherently detected, are multiplexed in an analog switch and serialized allowing the use of a single analog to digital converter. In the case of two auxiliary aerials a 6 input multiplexer must be used and, in the hypothesis of a 1 Msec samplings 166 nsec conversion time must be obtained. The output of the converter (a TDC 1019J can be adopted able to digitize an analog signal at a rate of 20 M samples per second) is stored in a proper buffer.
Gorithm has been tested in a computer simulation against a time-varying clutter environment. g. CNR, p , f ) has been allowed to switch after the 20-th range cell, from one value to another. The IF has been drawn vs K (range-cell number) in FIGS. 6,7,8, for different values of a and for N = 4 processed pulses. The optimum IF values in the examined conditions are also shown for comparison. As a general conclusion, with a suitable choice of a , i t is possible to attain a steady-state loss within 2-3 dBs or less, in a transient time of nearly ten range cells.
Antonov An-12 The Soviet Hercules (Red Star vol. 33) by Yefim Gordon, Dmitriy Komissarov