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The MSR (Multi-Scale Retinex) image enhancement algorithm can produce best performance in most cases, but the computation load is very huge especially for large image. In this paper, an efficient approach is proposed to accelerate MSR image enhancement speed on GPU via CUDA (Compute Unified Device Architecture). Time consuming modules such as multi-scale Gaussian filter, logarithmic domain differencing...
This paper discusses a global position system (GPS) synchronized wide area multilateration (WAM) system for air traffic management. The system takes advantage of secondary surveillance radar (SSR) downlink mode S/A/C signals on 1090 MHz channel, determines the position of airplane passively by TDOA (time differential of arrival) hyperbolic position method. Also this system has ADS-B (auto-dependent...
A hybrid Time-Delay Estimation (TDE) method for single-frequency pulse signals is proposed. This method combines differential Maximum Likelihood (ML) TDE and TDE using the phase difference of the DTFT (Discrete-Time Fourier Transform) of the received signals. It first estimates the coarse delay of the pulse using ML TDE, and then truncates the section of the pulse and use DTFT-based TDE to estimate...
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