This paper proposes the use of ultrasonic microscale subarrayed MIMO RADARs to estimate the position of breast cancer nodes.\nThetransmit and receive antenna arrays are divided into subarrays. In order to increase the signal diversity each subarray is assigned\na different waveform from an orthogonal set. High-frequency ultrasonic transducers are used since a breast is considered to be\na superficial structure. Closed form expressions for the optimal Neyman-Pearson detector are derived. The combination of the\nwaveform diversity present in the subarrayed deployment and traditional phased-array RADAR techniques provides promising\nresults.
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