CENIIT FINAL PROJECT REPORT – Flexible Frequency-Band Reallocation

A. Major Technical Results in Brief A new technique for flexible frequency-band reallocation has been developed that can substantially outperform the existing ones when all desired aspects such as flexibility, low complexity and inherent parallelism, perfect frequency-band reallocation (PFR), spectral efficiency, and simplicity are simultaneously considered. In particular, compared with previous techniques that can approximate PFR as close as desired, the new technique may have one or two orders of magnitude lower complexity. The core of the proposed technique is a novel on-line variable oversampled complex-modulated filter bank. New principles for singleand multi-parameter estimation in relation to time-interleaved A/D-converters have been developed. These estimation techniques have excellent convergence and accuracy properties and have been important milestones in the development of advanced A/D-converter principles. Further, low-complexity reconstruction principles for A/D-converter interleaving mismatch have been developed which support 16-bit resolution reconstruction. Novel, very promising principles for transmultiplexing (the process of transmitting multiple data streams on a single channel with little or no interference between the transmitted signals) have been developed. These all fit well with and can be used together with the developed flexible frequency-band reallocation networks. The above mentioned project contributions have been published in international scientific journals.