Systems Aspects of Digital Beam Forming Ubiquitous Radar

Abstract : This paper describes the general characteristics and potential capabilities of digital beam forming (DBF) ubiquitous radar, one that looks everywhere all the time. In a ubiquitous radar, the receiving antenna consists of a number of fixed contiguous high-gain beams that cover the same region as a fixed low-gain (quasi-omnidirectional) transmitting antenna. The ubiquitous radar is quite different from the mechanically rotating-antenna radar or the conventional multifunction phased array radar in that it can carry out multiple functions simultaneously rather than sequentially. Thus it has the important advantage that its various functions do not have to be performed in sequence one at a time, something that is a serious limitation of conventional phased arrays. A radar that looks everywhere all the time uses long integration times with many pulses, which allows better shaping of Doppler filters for better MTI or pulse Doppler processing. The DBF ubiquitous radar is a new method for achieving important radar capabilities not readily available with current radar architectures.

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