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The ambiguity in tracking of Multiplexed Binary Offset Carrier (MBOC) modulated signals will severely degrade the tracking accuracy. Therefore, unambiguous tracking for MBOC is crucial prerequisite for modern Global Navigation Satellite System (GNSS) receivers. In this paper, a new unambiguous technique is proposed based on combined correlation functions for MBOC which are used in the Galileo E1 band...
The harmonic pollution has become a more and more serious problem because of the large-scale application of nonlinear electrical loads in power systems. It is known to all that fast Fourier transformation (FFT) is an effective method for power signal harmonic analysis, but aliasing effect, picket fence effect, spectrum leakage and spectrum disturbance make it suffer from inevitable limitation. In...
The Binary Offset Carrier (BOC) modulation has been selected by the four most influential Global Navigation Satellite Systems (GNSS) and several other regional ranging systems. Although the Autocorrelation Function (ACF) of BOC has sharper main peak and better multipath mitigation performance than BPSK, its multiple side peaks cause ambiguity in signal acquisition and tracking. In this paper, we present...
In this paper, a stochastic computation (SC) based hardware implementation for 4-point DCT in the emerging High Efficiency Video Coding (HEVC) standard was provided. HEVC employs integer DCT with larger transform coefficients than the preceding standards. Hence the multipliers and adders therein are also more hardware consuming. With SC theory applied to DCT hardware design, the circuit implementation...
High Efficiency Video Coding (HEVC) is the newest standard of video coding being developed by JCT-VC. It flexibly uses quad-tree structure, which makes the encoding procedure more complex and time-consuming compared with H.264/AVC. For intra prediction, determining the optimal distribution of coding unit (CU) size requires huge computing time. In this paper, we propose a new fast CU size selection...
In this paper, we propose an improved method for single image haze removal based on the dark channel prior. The dark channel prior is a kind of statistics of outdoor haze-free images. It estimates the transmission map and gives out a superior result. While refining the transmission map with soft matting is computation consuming and this prior is invalid for near white scenes. We simplify the refining...
Binary offset carrier (BOC) modulated signals are widely used in the new global navigation satellite system (GNSS). These signals improve tracking accuracy and provide better resistance to multipath and narrowband interference. However, these advantages come at a price, namely the ambiguity problem in acquiring and tracking. In this paper, a novel ambiguity mitigating technique is proposed for arbitrary...
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