摘要
In this paper,a new approach for wireless data transmission within an aircraft cabin is presented.The proposed application enables the transmission of data to a passenger’s user device.As wireless in-flight applications are subject to strict frequency and electromagnetic compatibility(EMC)regulations,the data is transferred by optical wireless transmission,specifically by two-dimensional visual codes.To this end,black-and-white or colored visual code sequences are displayed on the in-flight entertainment screen.These visual codes are captured by the built-in camera of the passenger’s mobile device and are decoded to reconstruct the transmitted data.In order to compensate for frame losses caused by effects like occlusion and motion blur,a temporal forward error correction coding scheme is applied.Transmission experiments within an Airbus A330 cabin mock-up demonstrate the functionality of the implemented system under realistic conditions such as ambient illumination and geometric configuration.Representative user devices are used for evaluation;specifically,a low-cost and a high-end smartphone are employed as receivers.Performance evaluations show that the proposed transmission system achieves data rates of up to 120 kbit/s per individual passenger seat with these user devices.As the user device has no physical connection to the sensitive on-board system,the proposed transmission system provides an intrinsic safety feature.
