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A major design factor for an accurate and successful DOA estimation in smart antenna systems is the appropriate choice of the antenna array configuration. This paper proposes a new array configuration called Uniform Circular Displaced Antenna Array (UC-DAA), which is especially useful for detecting coherent signals encountered in multipath environments. The proposed configuration is composed of two...
This paper presents an approach to measure human subcutaneous fat thickness automatically using ultrasound radio frequency (RF) signals. We propose using spatially compounded spectrum properties extracted from the RF signals of ultrasound for the purpose of fat boundary detection. Our fat detection framework consists of 4 main steps. The first step is to capture RF data from 11 ultrasound beam angles...
32-amplitude and phase-shift-keying (32APSK) is one of the modulation schemes proposed in the 2nd generation digital video broadcasting over satellite (DVB-S2) standard. This paper presents a non-data-aided (NDA) SNR estimation scheme for 32APSK using the expectation-maximization (EM) algorithm. Two variants of the EM algorithm are presented, first with an arbitrary initialization and a second version...
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