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Traditional approaches for interference suppression will enjoy the added benefits when more domains are involved in antenna array. However, the information from range domain and its collaboration with other domains are rarely explored, and their potentials in improvement of radar performance are under-estimated. In this paper, we introduce the concept of polarization sensitive frequency diverse array...
In the electronic communication, radar, navigation and sonar, it is very important to suppress the interference and extract the target effectively without any phase-amplitude shift. A number of signal processing optimal algorithms developed, we apply the smart antenna to adaptive filtering. But the performances of adaptive filtering differ from each other corresponding to different algorithms. The...
Normal methods of spatial filtering methods may change the coherent characteristic of the target, which reduces the effect of accumulation in coherent systems despite the improvement of signal-to-interference and noise ratio (SINR). To avoid the amplitude and phase distortion introduced by the filters, null phase-shift spatial filter (NPSF) is proposed in this paper. NPSF can suppress the interference...
Radio frequency interference (RFI) cancellation is a main problem to be solved in High Frequency Surface Wave Radar (HFSWR) system. To minimize the impact of RFI, a number of signal processing techniques, such as adaptive beamforming and polarization filtering, have been developed. However, the performance of these conventional methods degrades a lot when the target and interferences have similar...
Interference suppression is a main problem to be solved in both radar and wireless communication systems. To minimize the impact of interference, a number of signal processing techniques, such as adaptive beamforming and frequency filtering, have been developed. However, the performance of these conventional methods degrades a lot when the target and interferences have similar parameters. In this...
The existing oblique projection (OP) technique usually pays attention to white background noise, but a colored noise assumption is more practical. To solve this problem, a minimized interference constrained generalized oblique projection (MIGOP) operator is proposed under colored noise scenario for interference suppression. It is proven that the OP filter is a special case of the MIGOP filter whereas...
Multi-domain signal filtering is a perspective technology in both radar and wireless communication systems. To obtain extra benefits compared with conventional methods, a novel joint space-frequency-polarization filter (SFPF) based on vector sensitive array (VSA) is presented in this paper. An orthogonal dual-polarization sensitive array (DPSA) and time delay units are applied to offer frequency,...
In this paper, a novel scheme for achieving fast synchronization in interleave division multiple access (IDMA), called spreading-IDMA (S-IDMA), is investigated. By introducing an extra despreader after the interleaver, S-IDMA can exploit the advanced techniques from code division multiple access (CDMA) and derives signal to interference-plus-noise ratio (SINR) improvement before iteration detection...
A novel polarization filtering method based on the oblique projection operator is proposed to improve the target detection performance for High Frequency Surface Wave Radar (HFSWR) system in this paper. The performance of the proposed oblique projection polarization filter (OPPF) is detailedly analyzed in presence of additive Gaussian white noise and the desired signal's Mean Square Error (MSE) with...
Call admission control (CAC) is one of the most important issues for radio resource management of wireless communication systems, which has been widely investigated. However, the computational complexity of the CAC algorithm is still a stringent concern. The performance of interleave-division multiple-access (IDMA) system can be assessed by tracking signal-to-interference-plus-noise ratio (SINR) evolution...
Combining polarization filtering with the oblique projection, we address an oblique projection polarization filter (OPPF) which enables the extraction of the desired polarized waves while suppressing the unwanted polarized interference signals, based on estimating the polarized parameters subspaces of desired signals and interferences. The simulation results show that the OPPF is a valid means to...
Ultra Wide Band (UWB) communication systems are considered to be ideally suited for future indoor and short-range wireless communications with high-speed data rate, as they operate at low power, provide high capacity in dense multipath environments. Combining the energy received over multipath, RAKE receiver usually holds good performances in the UWB communications environment. However, interferences...
Based on the oblique projection operators, a novel method for interference suppressing named oblique projection polarization filter (OPPF) in the polarization domain is proposed, which is valid for nonorthogonal polarization filtering or projecting. After discussing the fundamental principle of the proposed OPPF in detail, simulation results are given to illustrate the suggested scheme is suitable...
Radio interference suppressing is a main problem to be solved in high frequency (HF) radar system. To effectively cancel the interference, the parameters of the polarization filter should timely adapt to the variation of the polarization of the interference, which may impact the amplitude and phase of the desired signal passing through the same polarization filter during the coherent integration time...
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