Book Review

Electronic Warfare in the Information Age

D. Curtis Schleher
Artech House, 1999 (605 pp)


A fascinating, up to date introduction to the technology of advanced radar techniques (such as synthetic aperture radar), digital radio frequency memory (DRFM), pulsed Doppler radar, and other techniques important in electronic warfare (EW). Its main emphasis is on EW countermeasures (principally radar jamming) and electronic counter-countermeasures (ECCM), and has no discussion of communications or information warfare. Also has a chapter on directed energy weapons and stealth technology. Based on a course taught at JHU. Contains a disk with 50 Matlab programs and has Matlab examples throughout the book.

Uses short, direct sentences. The author's enthusiasm for high-tech radar and radar jamming, especially DRFM, is evident. Critical points, such as range gate pull-off (RGPO), are skillfully repeated several times throughout the book to aid comprehension. However, other points, such as Barker coded waveforms, are assumed to be understood and are not explained clearly. Conical scan seekers used in IR-tracking missiles also could not possibly work as described, and the book's description must be missing some critical detail. However, these are minor points, and most of the descriptions are exceptionally clear.

Here is a typical paragraph:

A block diagram of a phase sampling DRFM is depicted in Figure 5.6. As with the quadrature-channel DRFM, the input signal is down-converted to baseband using quadrature reference oscillators. The down-converted signal is then processed in a phase detector that produces the operation arctan(y(t)/x(t)). The phase is digitized in an A/D converter and stored in a digital memory. The jamming signal is produced by reading the phase information into a D/A converter that provides the instantaneous phase between the x(t) and y(t) quadrature components. The x(t) and y(t) components are synthesized from this information, up-converted by mixing with the reference local oscillators, and combined into the final signal.

This paragraph would make a good description of DRFM by itself.

The math in the book is fairly straightforward; it requires an understanding of Fourier transforms, and some basic linear algebra. Will provide a thorough understanding of the principles and role of radar in EW.