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In this letter, a novel method which employs the Radon transform (RT) and inverse Radon transform is proposed to estimate the parameters of the hybrid linear frequency modulation (LFM)-sinusoidal frequency modulation (SFM) signal. By adding a parameter called width, we extend the original RT to a three-parameter transform, which we named as extended Radon transform (ERT). Compared with the original...
A new method for estimating direction of arrival (DOA) of the strong and weak signals is proposed in the presence of array gain and phase mismatch. Firstly, the array gain and phase mismatch is estimated using the norm of the error vector between the practical steering vector and the theoretical vector of the strong signal, and then the data covariance matrix is calibrated. Secondly, the new seek...
Observability and controllability are fundamental concepts of control systems. In this paper, we use dynamical optimization and its computational methods as the tool to define and to quantitatively measure the observability and reachability. In addition, the duality between the observability and reachability becomes straightforward under the definitions introduced in this paper. Several examples are...
Feedforward data-aided and non-data-aided carrier synchronization algorithms are commonly used for burst transmission. In this paper, we focus on the design of decision-directed carrier synchronization algorithm which can jointly estimate the frequency and phase offset for PSK transmission. Compared with other traditional methods, the proposed algorithm employ only a short length of preamble, while...
Focusing on the carrier frequency recovery problem of PSK signals with low SNR and large frequency offset, an improved frequency estimator was proposed. Its estimation range is as large as a half symbol rate and its accuracy is close to MCRB. The analysis are confirmed by simulation.
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