摘要:

Integrated-circuit binary shift registers are used to realize the matched-filter to randomly coded radar signals. The system exploits the favourable range side-lobe properties of randomly changing binary codes to achieve pulse compression ratios greater than those obtainable with fixed coding schemes. The output noise distribution, signal/noise ratio, range resolution characteristics, range side-lobes and range ambiguities, and Doppler response of such a radar system are discussed.

DOI:10.1049/ree.1968.0058

出版商:IERE    

年代:1968

数据来源: IET

摘要:

This paper contains: (a) an account of the phenomenological theory of noise in linear amplifiers operating from resistive signal sources; (b) a discussion of the noise parameters of bipolar and junction fieldeffect transistors; and (c) examples of how these principles can be applied in practical circuit design for resistive sources.

DOI:10.1049/ree.1968.0059

出版商:IERE    

年代:1968

数据来源: IET

摘要:

The device parameters which are relevant in the design of low-noise circuits are discussed and the results of experimental work on a number of commercial types are presented.

DOI:10.1049/ree.1968.0060

出版商:IERE    

年代:1968

数据来源: IET

摘要:

Alpha-numerics are used to identify broadband radar targets on a p.p.i. display for air traffic controllers. A technique for writing the broadband data is described which reduces the time required to a constant time independent of radar display range. This constant time can be chosen so that adequate time is allotted for the writing of radar target associated alpha-numeric data. For alpha-numerics to be usable some method of association must be provided between the alpha-numerics and the radar target. The digital conversion techniques will allow for target detection outside the time domain.

DOI:10.1049/ree.1968.0062

出版商:IERE    

年代:1968

数据来源: IET

摘要:

The ungrounded inductor is approximated closely by the transmission matrix (1,Ls; g, 1), whereL = CR2, by makinggsufficiently small. A representation of this matrix is obtained by a form of synthesis procedure and realized in active-RC form, withLderived by inversion of a capacitorC, using a minimal number of grounded operational amplifiers of only one type. The theory has been confirmed experimentally by replacing an actual coil in single sections of prototype and shuntm-derived low-pass filter.

DOI:10.1049/ree.1968.0063

出版商:IERE    

年代:1968

数据来源: IET

摘要:

Resistively mismatched, reactively tuned single amplifier stages can be designed for a given measure of stability or performance factor,n, by the analytical solution of appropriate equations. The present paper provides a computer solution in the form of graphs for values of performance factor ranging between 1 and 10 and a closely accurate analytical solution forn≥ 10. Using these results, designs of mismatched single stages can be worked out. A design is worked out by way of example.

DOI:10.1049/ree.1968.0065

出版商:IERE    

年代:1968

数据来源: IET