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In this paper, we derive the non-oscillation condition for a digital on-channel repeater (DOCR) with a feedback interference canceller (FIC) in Digital Terrestrial Television Broadcasting (DTTB) networks. Based on it, a new gain control scheme is proposed. Compared with the conventional gain control scheme, the proposed scheme avoids the oscillation in the DOCR and decreases the gain adjusting time...
This paper proposes a competitive stop Mahalanobis distance based expectation-maximization (CSMDEM) algorithm for learning a Gaussian mixture model (GMM) from multivariate data. This algorithm embeds a splitting failure condition and a competitive stop condition into the original Mahalanobis distance based EM (MDEM) algorithm. The goal of introducing the above two conditions is to avoid over-splitting...
The multiple-input multiple-output (MIMO) radar system is a new kind of radar technology. It can choose flexibly the probing signals transmitted via its antennas or increase the inter-element distance to reduce the cross-correlation of the signals, so that the spatial diversity gain can be obtained. Waveform design is one of the important topics of the MIMO radar. We discuss here the waveform design...
The autocorrelation sidelobe peak (ASP) levels of discrete frequency-coding waveform with fixed frequency pulses (DFCW_FF) is very large. It is about 0.21 or -13.2dB. Replacing the fixed frequency pulses with linear FM pulses (LFM) can lower the ASP. We investigate theambiguity function (AF) and cross-AF for DFCW with arbitrary frequency firing order. It shows that DFCW_LFM have different AF expression...
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