Intrepid digital microwave. A new approach to bistatic radar

Southwest Microwave, Inc. (SMI) introduced the world's first commercially viable bistatic microwave intrusion detection sensor in 1971. Bistatic microwave has become the paradigm for high security perimeters, and SMI products have become industry standards. With the introduction of the Intrepid Digital Microwave, SMI brings the latest in Digital Signal Processing (DSP) and power and data networking to this proven sensor technology     

The Global System: Conditions for Peace, Stability, and Social Justice

Achievement of peace, stability, and social justice on a global scale are seen to require fundamental whole-system change. At the deepest level this involves change in the basic premises underlying modern industrial society. Forces that could bring about such a fundamental change are evident. Appropriate use of new understandings of the power of inner imagery and affirmation could help keep the change from being as disruptive and as generative of human misery as have been some such changes in the past. James Miller has identified some of the ubiquitous characteristics of ``Living Systems', including human societies [1]. Maxwell Maltz, in writing about ``Psychocybernetics', has used a simple systems analogue to explain the power of affirmation (``self-fulfilling belief') to heal and to achieve other goals [2]. Gary Schwartz has proposed a multi-level systems model for understanding the power of inner imagery to contribute to healing of the human body [3]. Gregory Bateson includes the concept of ``a larger mind of which the individual mind is only a subsystem...(that) is immanent in the total interconnected social system and includes the planetary ecology' [4]. The following paper extends these concepts to explore conditions for healing the planet and achieving a ``cooperative security system' [5]. One of the most significant characteristics in understanding the behavior of social systems is the presence of feedback.     

Improving intrusion detection radar

The first monostatic microwave intrusion detection sensor with range cutoff was introduced in 1984. This range cutoff circuit as used in the Model 375 and 385 has proven very effective in preventing nuisance alarms beyond a user-defined range. The Intrepid Digital Transceiver introduced in this paper builds upon this proven technology with the addition of a unique digital signal processing routine that measures range to the intruder. Intrepid Digital Transceiver alternately transmits pulses at two discrete frequencies within K-Band. When an intruder enters the detection zone, the Doppler response at each frequency is digitally recorded. The difference between the two frequencies is controlled so that the phase angle between the two Doppler responses can be used to determine the unambiguous range to the target. As a byproduct of the process targets approaching the transceiver can be distinguished from those moving away from the transceiver. Range information is used to enhance the signal processing. The amount of signal integration is increased with range in proportion to the width of the detection pattern so as to optimize the signal to noise ratio (SNR).