Abstract: An optical wireless communication network includes a gateway router and a large number of optical network nodes. The gateway router includes a controllable light source, a photodetector and a modulation/demodulation apparatus coupled to the controllable light source and the photodetector. Each of the large number of optical network nodes respectively includes an optical signal transmission path extending between two optical network interfaces of the optical network node, at least one beam splitter arranged in the optical signal transmission path, and an optical network access point that is coupled to an optical access interface of the beam splitter.

Abstract: A method for masking communication signals, particularly for masking terrestrial RF communication signals on board of an aircraft, includes parallelizing a first information data stream to be transmitted on a first LTE transmission channel. The first LTE transmission channel has a first channel transmission bandwidth and at least one guard band adjacent to the channel transmission bandwidth. The first information data stream is spread over mutually orthogonal data subcarriers within the first channel transmission bandwidth. A CAZAC sequence is generated. The generated CAZAC sequence is spread over guard band subcarriers within the at least one guard band. The first information data stream is transmitted over the data subcarriers in parallel to the CAZAC sequence over the guard band subcarriers.

Abstract: A method for masking communication signals, particularly for masking terrestrial RF communication signals on board of an aircraft, includes parallelizing a first information data stream to be transmitted on a first LTE transmission channel. The first LTE transmission channel has a first channel transmission bandwidth and at least one guard band adjacent to the channel transmission bandwidth. The first information data stream is spread over mutually orthogonal data subcarriers within the first channel transmission bandwidth. A CAZAC sequence is generated. The generated CAZAC sequence is spread over guard band subcarriers within the at least one guard band. The first information data stream is transmitted over the data subcarriers in parallel to the CAZAC sequence over the guard band subcarriers.

Abstract: A method for masking communication signals, particularly for masking terrestrial RF communication signals on board of an aircraft, includes parallelizing a first information data stream to be transmitted on a first LTE transmission channel, the first LTE transmission channel having a first channel transmission bandwidth and at least one guard band adjacent to the channel transmission bandwidth; spreading the first information data stream over a plurality of mutually orthogonal data subcarriers within the first channel transmission bandwidth; generating a CAZAC sequence; spreading the generated CAZAC sequence over guard band subcarriers within the at least one guard band; and transmitting the first information data stream over the data subcarriers in parallel to the CAZAC sequence over the guard band subcarriers.

Abstract: A method for masking communication signals, particularly for masking terrestrial RF communication signals on board of an aircraft, includes parallelizing a first information data stream to be transmitted on a first LTE transmission channel, the first LTE transmission channel having a first channel transmission bandwidth and at least one guard band adjacent to the channel transmission bandwidth; spreading the first information data stream over a plurality of mutually orthogonal data subcarriers within the first channel transmission bandwidth; generating a CAZAC sequence; spreading the generated CAZAC sequence over guard band subcarriers within the at least one guard band; and transmitting the first information data stream over the data subcarriers in parallel to the CAZAC sequence over the guard band subcarriers.

Abstract: The invention relates to an aircraft data communication system as well as an aircraft comprising such a data communication system, in particular a wireless optical communication system inside an aircraft cabin and outside for aircraft services. The aircraft data communication system comprises a first sending unit 10 comprising a first sender and a first modulator, and a first receiving unit comprising a first receiver and a first demodulator. The communication system is adapted for a signal transmission between the first sender and the first receiver, wherein the signal transmission between the first sending unit and the first receiving unit is effected by light, and wherein the first modulator is adapted for modulating an amplitude of the transmitted light.