Inter-channel interference rejection for maritime AIS system
نویسندگان
چکیده
We study inter-channel interferences in VHF transmissions for the maritime automatic identification system and propose solutions to avoid them. The inter-channel interference is caused by the brevity of SOTDMA frames used by ships to transmit their position. In order to avoid the spreading of the spectrum, two solutions are considered. A Tukey window is first used to avoid a too hard transition between consecutive temporal slots. The second solution consists in using a Chebyshev lowpass filter. We compare these two solutions in term of interference and show that their association can be envisaged with reasonable complexity.
منابع مشابه
An Automatic Identification System (AIS) Database for Maritime Trajectory Prediction and Data Mining
In recent years, maritime safety and efficiency become more and more important across the world. Automatic Identification System (AIS) tracks vessel movement by onboard transceiver and terrestrial and/or satellite base station. The data collected by AIS contains broadcast kinematic information and static information. Both of them are useful for anomaly detection and route prediction which are k...
متن کاملThe Optimal MMSE Transceiver Design for IoT-oriented Cognitive Radio Systems
This paper studies interference alignment scheme and minimum mean square error (MMSE) improvement in Internet of Things (IoT)-oriented cognitive systems, where IoT devices share the licensed spectrum by cognitive radio in spectrum underlay. Target to manage the inter-tier interference caused by cognitive spectrum sharing as well as ensure an MMSE at receivers, the interference alignment algorit...
متن کاملUnsupervised Learning of Maritime Traffic Patterns for Anomaly Detection
Maritime anomaly detection requires an efficient representation and consistent knowledge of vessel behaviour. Automatic Identification System (AIS) data provides ships state vector and identity information that is here used to automatically derive knowledge of maritime traffic in an unsupervised way. The proposed approach only utilises AIS data, historical or real-time, and is aimed at incremen...
متن کاملPerformance of the Wavelet Transform-Neural Network Based Receiver for DPIM in Diffuse Indoor Optical Wireless Links in Presence of Artificial Light Interference
Artificial neural network (ANN) has application in communication engineering in diverse areas such as channel equalization, channel modeling, error control code because of its capability of nonlinear processing, adaptability, and parallel processing. On the other hand, wavelet transform (WT) with both the time and the frequency resolution provides the exact representation of signal in both doma...
متن کاملA Literature Review in Methods to Reduce Multiple Access Interference, Inter-symbol Interference and Co-channel Interference
This discussion will be primarily focused on the problem of jointly suppressing the different interferences such as Multiple Access Interference (MAI) and Intersymbol Interference (ISI), which are the limiting sources of interference for high data-rate wireless applications, as in wireless multimedia or Spread Spectrum Code Division Multiple Access. After describing the general problem of inter...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005