Geosphere: An exact depth-first sphere decoder architecture scalable to very dense constellations

G Georgis, K Nikitopoulos, K Jamieson - IEEE Access, 2017 - ieeexplore.ieee.org
… ML solution by transforming the detection problem into a tree … into why Geosphere improves
performance, we also report the number of visited nodes. Since in an OFDM system, MIMO

ScatterMIMO: Enabling virtual MIMO with smart surfaces

M Dunna, C Zhang, D Sievenpiper… - … on Mobile Computing and …, 2020 - dl.acm.org
Turns out we cannot, the challenge is the AP would always … We compare the performance
of ScatterMIMO in terms of throughput … achieving full MIMO capacity in realistic environments. …

Performance/complexity trade-offs of the sphere decoder algorithm for massive MIMO systems

A Dabah, H Ltaief, Z Rezki, MA Arfaoui… - arXiv preprint arXiv …, 2020 - arxiv.org
… the massive MIMO scaling challenge by adapting the SD algorithm to achieve both decent
BER performance and acceptable time … Geosphere: Consistently turning mimo capacity into

Signal detection for large MIMO systems using sphere decoding on FPGAs

MW Hassan, A Dabah, H Ltaief… - 2023 IEEE International …, 2023 - ieeexplore.ieee.org
… combining the strengths of both Geosphere [14] and the GEMM-… a performance comparison
for a 4QAM 10×10 MIMO system … , “Geosphere: Consistently turning mimo capacity into

{FlexCore}: Massively Parallel and Flexible Processing for Large {MIMO} Access Points

C Husmann, G Georgis, K Nikitopoulos… - … USENIX Symposium on …, 2017 - usenix.org
throughput of FlexCore against the throughput of Geosphere … This ability to reclaim the
unexploited throughput of linear … the 8-threaded CPU version which in turn provides a maximum …

Massively parallel, nonlinear processing for 6G: Potential gains and further research challenges

K Nikitopoulos - IEEE Communications Magazine, 2022 - ieeexplore.ieee.org
… not only increase system’s capacity and, consequently, system’… translate the available
capacity into throughput that is … MIMO processing approaches target converting the MIMO

Multisphere: Massively parallel tree search for large sphere decoders

K Nikitopoulos, D Chatzipanagiotis… - 2016 IEEE Global …, 2016 - ieeexplore.ieee.org
… information streams this work focuses on MIMO systems. … This Section evaluates MultiSphere’s
performance via sim… than the highly optimized sequential Geosphere SD. In the high SNR …

{VMscatter}: A versatile {MIMO} backscatter

X Liu, Z Chi, W Wang, Y Yao, T Zhu - 17th USENIX symposium on …, 2020 - usenix.org
… -time coding on the tag by only turning on/off the switches, because … We evaluate the
performance of VMscatter in MIMO … to improve the capacity gains in large-scale MU-MIMO

Viper MIMO: Increasing large MIMO efficiency via practical vector-perturbation

C Husmann, K Nikitopoulos - 2018 IEEE Global …, 2018 - ieeexplore.ieee.org
… translate the capacity gains of ViPer into actual throughput gains… In order to evaluate ViPer’s
throughput performance we … SE (implemented by means of Geosphere [10]) is reduced from …

Towards 6G MIMO systems, with massively-parallel non-linear processing

JCDL Ducoing, C Jayawardena, M Filo… - … Conference on …, 2021 - ieeexplore.ieee.org
… , the achievable throughput may be far below the MIMO capacity, since … performance.
Nonlinear (NL) processing could close the capacity gap and achieve a higher sum throughput