Binary Pseudo Random Phase Correlation in Radar Systems - A New Approach
ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (UNITED KINGDOM)
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The growing requirement for low probability of intercept characteristics in radar sensors is producing increasing interest in continuous wave cw radars. Pure cw radars have no inherent ranging capability, and it is therefore customary to modulate the cw transmission in some way if ranging is required. An increasingly popular modulation scheme is Binary Pseudo Random Phase Coding BPRPC, whereby the phase of the transmitted signal is switched between O degs. and 180 degs. under the control of a binary pseudo random sequence of length n, variously known as a pseudo random code, maximal sequence or Galois Code. Techniques for achieving the correlation of binary pseudo random phase coded signals in doppler radar sensors are discussed. A new design based on current technology is developed which potentially offers both a low cost and highly integrable solution. Prototype hardware is constructed and tested and its performance compared with other designs. Excellent performance is achievable without the penalties of size and weight which the other designs carry. Australia.
- Active and Passive Radar Detection and Equipment