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An effective method is proposed to estimate the desired-signal (S) subspace by the intersection between the signal-plus-interference (SI) subspace and a reference space covering the angular region where the desired signal is located. The estimated S subspace is robust to steering vector mismatch and overestimation of the SI subspace, capable of detecting the relative strength of the desired signal...
As users are increasingly concerned about energy efficiency, they are also increasingly intolerant of performance anomalies of programs that may cause significant energy waste. Bug localization is a bottleneck in the development of multithreaded programs. Although both static and dynamic performance bug localization techniques have been proposed, they cannot handle performance anomalies with unforeseen...
As a key point of orthogonal frequency division multiplexing (OFDM) technology, carrier frequency offset (CFO) has a significant effect on OFDM system performance. This paper proposes a CFO estimation method by using complementary sequence (CS) as training sequence. The proposed CS-based method can operate integer CFO and fractional CFO estimations on the basis of the same training sequence. The fractional...
A general approach to the kinematics modeling and analyses of articulated all-terrain rovers traversing uneven terrain is describes in this paper. In addition, caster and camber are taken into consideration. Based on a four wheel rover, the model is derived for full 6 DOF motion, enabling movements in the, and directions, as well as rotations of pitch, roll and yaw. Differential kinematics is derived...
Based on circular conjugate symmetry properties (CCSP) of discrete Fourier transform (DFT), a novel approach to nonorthogonal frequency division multiplexing (NOFDM) is presented. Different from other NOFDM systems, a simple estimation algorithm is exploited in the receiver instead of maximum likelihood sequence detection (MLSD) while the bit error rate (BER) of the proposed system is similar to those...
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