In airborne radar system, clutter suppression and dim target detection are two challenging problems. Space-time adaptive processing (STAP) can provide good clutter suppression potential. Nevertheless, the low energy o...
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ISBN:
(数字)9781665452489
ISBN:
(纸本)9781665452489
In airborne radar system, clutter suppression and dim target detection are two challenging problems. Space-time adaptive processing (STAP) can provide good clutter suppression potential. Nevertheless, the low energy of dim targets and the energy loss after STAP make traditional detection method invalid. Based on the problem, the multi-frame joint space-time adaptive processing strategy (MF-STAP) is proposed. Through the multi-frame accumulation, dim targets can be clearly distinguished from the clutter. The original MF-STAP restrict attention to the range domain, which we refer to as range domain MF-STAP (R-MF-STAP) in this paper. Whereas, the elimination of Doppler parameter brings raw information loss and miss detection. To remedy this deficiency, we propose a range-Doppler domain MF-STAP strategy (RD-MF-STAP) in this paper, operating multi-frame accumulation at both range and Doppler domain after STAP process. The performance assessment, conducted resorting to Monte Carlo simulation, shows that the proposed RD-MF-performance than R-MF-STAP strategy.
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy netwo...
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ISBN:
(纸本)9781424442966
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy networks with low latency. Our previous work entitled RECAP, transmitted a low resolution redundant version of a parent video stream, in order to achieve effective concealment of isolated and burst losses by clever multi-frame super-resolution processing at the decoder. A reference picture selection mechanism was used to transmit the low-resolution redundant video with high guarantee and stop drift in case of losses. In this work, we extend the framework to incorporate an additional distributed Wyner-Ziv coding layer on the low-resolution information to further correct errors, and consequently improve the error-concealed picture quality. The error-concealed super-resolved frame using the low-resolution information alone, now acts as side-information at the decoder to correct additional errors by decoding the Wyner-Ziv layer. Preliminary results are presented to demonstrate the efficacy of the proposed approach.
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy netwo...
详细信息
ISBN:
(纸本)9781424442959
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy networks with low latency. Our previous work entitled RECAP, transmitted a low resolution redundant version of a parent video stream, in order to achieve effective concealment of isolated and burst losses by clever multi-frame super-resolution processing at the decoder. A reference picture selection mechanism was used to transmit the low-resolution redundant video with high guarantee and stop drift in case of losses. In this work, we extend the framework to incorporate an additional distributed Wyner-Ziv coding layer on the low-resolution information to further correct errors, and consequently improve the error-concealed picture quality. The error-concealed super-resolved frame using the low-resolution information alone, now acts as side-information at the decoder to correct additional errors by decoding the Wyner-Ziv layer. Preliminary results are presented to demonstrate the efficacy of the proposed approach.
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