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Increasing Radar Target Information

Published online by Cambridge University Press:  18 January 2010

V. G. Welsby  and
D. E. N. Davies
V. G. Welsby
Affiliation:
(Department of Electrical Engineering, University of Birmingham)
D. E. N. Davies
Affiliation:
(Department of Electrical Engineering, University of Birmingham)
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Abstract

Collision-avoidance devices are all based on the use of either electromagnetic or acoustic waves, although the former (i.e. radar) is of particular interest for this purpose.

After reviewing briefly the fundamental theory which underlies all methods of detecting, locating and recognizing a distant target, reference is made to the successful development, in the Electrical Engineering Department of the University of Birmingham, of a narrow-band sector-scanning sonar system employing a multiplicative array to give improved target resolution. It has been demonstrated experimentally that the same principle can be applied to obtain a sector-scanning radar system capable of scanning rates as high as one million scans per second, which has applications for airfield surveillance radar. Attention is now being directed to the possibility of using wide-band signals, either to improve target detection and location for an array of a given size or to obtain additional information about the nature and behaviour of the radar target itself. Two possible methods of using wide-band signals are described.

Type
The Prevention of Collision at Sea and in the Air by Shore-And Ground-Based Means
Information
The Journal of Navigation , Volume 15 , Issue 1 , January 1962 , pp. 62 - 69
Copyright
Copyright © The Royal Institute of Navigation 1962

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References

REFERENCES

1Woodward, P. M. (1955). Probability and Information Theory with Applications to Radar, Pergamon Press, London.Google Scholar
2Shannon, C. E. (1949). Communication in the presence of noise, Proc. Inst. Radio Engrs, 37, 10.Google Scholar
3Brown, J. L. and Rowlands, R. O. (1959). Design of directional arrays, J.A.S.A., 31, 1638.Google Scholar
4Koch, W. E. and Stone, J. L. (1958). Space-frequency equivalence, Proc. Inst. Radio Engrs, 46, 499.Google Scholar
5Koch, W. E. (1959). Related experiments with sound waves and electromagnetic waves, Proc. Inst. Radio Engrs, 47, 1192.Google Scholar
6Block, A., Medhurst, R. G. and Pool, S. D. (1953). A new approach to the design of super-directive aerial arrays, Proc.I.E.E., Part III, 100, 303.Google Scholar
7Schelkunoff, S. A. (1943). A mathematical theory of linear arrays, B.S.T.J., 11, 80.Google Scholar
8Toraldo Di Francia, G. (1955). Directivity, super-gain, and information, Trans.I.R.E., A.P. 4, 473.Google Scholar
9Jacobson, M. J. (1957). Analysis of a multiple receiver correlation system, J.A.S.A., 29, 1342.CrossRefGoogle Scholar
10Berman, A. and Clay, C. S. (1957). Theory of time-averaged-product arrays, J.A.S.A., 29, 805.CrossRefGoogle Scholar
11Fakley, D. C. (1959). Comparison between the performances of a time-averaged product array and an interclass correlator, J.A.S.A., 31, 1307.CrossRefGoogle Scholar
12Tucker, D. G. (1958). The signal/noise performance of superdirective arrays, Acustica, 8, 112.Google Scholar
13Welsby, V. G. and Tucker, D. G. (1959). Multiplicative receiving arrays, J. Brit. Instn Radio Engrs, 19, 369.Google Scholar
14Welsby, V. G. (1961). Multiplicative receiving arrays: The angular resolution of targets in a sonar system with electronic sector scanning, J. Brit. Instn Radio Engrs, 22, 5.Google Scholar
15Tucker, D. G., Welsby, V. G., Kay, L., Tucker, M. J., Stubbs, A. R. and Henderson, J. G. (1959). Underwater echo-ranging with electronic sector scanning: sea trials on R.R.S. Discovery II, J. Brit. Instn Radio Engrs, 19, 681.Google Scholar
16McCartney, B. S. An improved electronic sector-scanning sonar receiver, J. Brit. Instn Radio Engrs (in course of publication).Google Scholar
17Davies, D. E. N. (1958). Radar systems with electronic sector scanning, J. Brit. Instn Radio Engrs, 18, 709.Google Scholar
18Davies, D. E. N. (1961) A fast electronically-scanned radar receiving system, J. Brit. Instn Radio Engrs, 21, 305.Google Scholar
19Faran, J. J. and Hills, R. (1953). Wide-band directivity of receiving arrays, U.S. Office of Naval Research, Acoustics Research Laboratory, Harvard University, Technical Memo. No. 31.Google Scholar
20Nodtvedt, H. (1951). The correlation function in the analysis of directive wave propagation, Phil. Mag., 42, 1022.Google Scholar
21Welsby, V. G. (1961). The use of signals with complex carrier wave forms to obtain improved directional response for a 2-element array, Electronic Technology, 38, 305.Google Scholar
22Anderson, V. C. (1960). Digital array phasing, J.A.S.A., 32, 867.CrossRefGoogle Scholar
23Kay, L. A plausible explanation of the bat's echo-location acuity, Animal Behaviour (in course of publication).Google Scholar
24Barber, N. F. (1959). Design of optimum arrays for direction-finding, Electronic and Radio Engineer, 36, 222.Google Scholar
25 British Patent Application No. 40307 (1959).Google Scholar
26Tucker, D. G. (1959). Electronic sector-scanning asdic. This Journal, 12, 184.Google Scholar
27Tucker, D. G. (1961). Space-frequency equivalence in directional arrays, I.E.E. Monograph, 11 1961.Google Scholar
28Madden, R. (1960). The indeterminacies of measurement using pulses of coherent electromagnetic energy, I.E.E. Monograph 417E.Google Scholar