University of South Australia

Myriota Pty Ltd

Ying Chen

David Victor Lawrie Haley

Andre Pollok

Alexander James Grant

Robert George McKilliam

William George Cowley

John Lawrence Buetefuer

Gottfried Lechner

Ingmar Rudiger Land

Linda Mary Davis

Marc Pierre Denis Lavenant

Mark Damian McDonnell

Robert George Mckilliam

Methods and apparatus for communication between terminals and an access node in a multiuser multicarrier communications network are described. The access node may be a satellite access node. Terminals are configured to perform initial estimation and tracking of channel offsets and to estimate channel offsets for future packets to be transmitted by the terminal. In some embodiments the channel offsets comprise mobility related channel offsets due to the relative movement between the access node and the plurality of terminals. Transmissions from the terminals to the access node are pre-compensated for the channel offsets, so that the aggregate signal received by the access node occupies a bandwidth greater or equal to the maximum signal bandwidth of any individual terminal. Terminal transmissions may overlap in frequency and time on the ground, but arrive orthogonally at the access node.

Multicarrier communications system

Parallel analog to digital converted (ADC) architectures that can be used to replace single path ADC architectures. The parallel ADC architecture can comprise N branches and one ADC per branch. These ADCs can be identical. However each branch can have a different path adjustments applied to the ADC. The path adjustments can be biases and/or gains and each ADC receives a different combination of biases and/or gain to generate multiple adjusted input signals. These are then combined to generate a quantized output signal. Using these parallel architectures a range of weighting and offset combining schemes can be employed to achieve improvements in signal to noise ratio and to reduce the impact of clipping as compared to a single path ADC architecture.

System and method for analog to digital conversion

Growing community of inventors

Adelaide, Australia

Ying Chen