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Narrow-band interference (NBI) and impulsive noise (IN) are two kinds of non-Gaussian noise that have a severe impact on vehicular communications. In this paper, a novel compressive sensing (CS)-based method of simultaneous NBI and IN mitigation is proposed, which is a double kill of the two kinds of unfavorable disturbances. A CS-based time–frequency-measuring orthogonal frequency-division multiplexing...
Tire marks printed correctly can ensure the tire used properly. Tire mark regions in a tire image being extracted correctly are the first guarantee in a tire mark recognition system. In this paper, extraction algorithm based on radial scan method is discussed. Experiment results show that half character be extracted to tire mark regions occasionally via radial scan method. Hence, an improved extraction...
In order to realize accuracy control, a trajectory planning algorithm is designed for the 4 DOF articulated eggplant-picking robot. The structure selection of the robot is made according to the eggplant's growth circumstance and distribution space. The robot kinematics model is established with D-H method and the forward kinematics solution for the robot is obtained. The inverse kinematics solution...
The unavoidable Doppler frequency shift reduces the correlation peak for code acquisition in global positioning system (GPS). In contrast to conventional methods where the code phase and Doppler frequency shift are separately treated, this paper proposes a novel three-step scheme for joint code acquisition and Doppler estimation, whereby not only the Doppler effect on the correlation peak is removed,...
Implementation of a carrier frequency offset (CFO) estimator with multiple correlation lags is presented in this paper. The proposed implementation breaks through the length constraint of single training sequence, and reduces the hardware cost of the estimator. A newly designed Automatic Frequency Control (AFC) loop are also proposed to achieve better utilization of multiple estimates and better trade-off...
Time-domain synchronous orthogonal frequency division multiplexing system (TDS-OFDM) employs known pseudo-noise (PN) sequences as guard interval padding between adjacent OFDM symbols. Accurate estimation of channel impulse response (CIR) is difficult but very important to recover transmitted OFDM symbols by subtracting padded PN sequences. Conventional channel estimation methods only use PN sequences...
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