Project

DSP for satellite communicatiosn

Publisher

Supervisor

Location

Greater Copenhagen area

"VSAT’’ equipment is used for maritime satellite communications. The modulated signal format is most often based on the DVB-S2 or DVBS2X standard.

VSAT systems use very large and heavy aperture antennas in order to obtain high performance. Cobham is starting to investigate the possibility to combining multiple small maritime VSAT antennas on a ship to achieve better signal to noise ratio (C/N). By using two antennas it is possible to improve the performance by up to 3dB

Various signal processing techniques are today used to combined signals from multiple antennas. Examples are Equal Gain Combining [EGC] & Maximal Ratio Combining [MRC], but these algorithms have usually been applied in different contexts.

One of the specific challenges on a ship is that the antennas are typically placed far apart. There is accordingly a large signal delay between the antennas. This signal delay will follow the ships movements, 'roll', ‘pitch’ and ‘yaw’.

A simple simulation model of the physical path length difference between the satellite and the two antennas on a ship shall be developed. An optimal way to combine the two DVB-S2 satellite signals, using signal processing algorithms, shall be described and simulated together with the model for ship movements.

VSAT operates in the Ku or Ka microwave bands, and is based on an approx. 60-100 cm diameter reflector antenna.

In collaboration with

Cobham SATCOM

Requirements

Knowledge of digital signal processing and communications

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Contact

Company / Organization

DTU Fotonik

Name

Søren Forchhammer

Position

Professor, Gruppeleder

Mail

sofo@fotonik.dtu.dk

Supervisor info

MSc in Electrical Engineering

Supervisor

Søren Forchhammer

ECTS credits

30 - 35

Type

MSc thesis

MSc in Engineering, Photonics Engineering

Supervisor

Søren Forchhammer

ECTS credits

30 - 35

Type

MSc thesis

MSc in Computer Science and Engineering

Supervisor

Søren Forchhammer

ECTS credits

30 - 35

Type

MSc thesis

MSc in Mathematical Modelling and Computation

Supervisor

Søren Forchhammer

ECTS credits

30 - 35

Type

MSc thesis

MSc in Telecommunication

Supervisor

Søren Forchhammer

ECTS credits

30 - 35

Type

MSc thesis

Technical University of Denmark

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