Pilot Contamination Postcoding in Large Scale Antenna Systems

  • Adhikary A.
  • Ashikhmin A.
  • Marzetta T.

This talk is to uplink communication in multi-cell multi-user LSASs (massive MIMO wireless system). We proposed a new approach for a limited cooperation between base stations in the network. We call it pilot contamination postcoding (PCP). Next we developed an algorithm for funding optimal PCP matrices for global PCP. In the global PCP all base stations in the network cooperate with each other, which may be feasible in a small network (say for a small town or so). Next we proposed a decentralized PCP, in which each base station cooperates only with a small number of neighboring cells. For the decentralized PCP we also developed an algorithm for funding optimal PCP matrices. Both global PCP and decentralized PCP give really excellent results - they give about 60 fold increase in data transmission rates.

Recent Publications

August 09, 2017

A Cloud Native Approach to 5G Network Slicing

  • Francini A.
  • Miller R.
  • Sharma S.

5G networks will have to support a set of very diverse and often extreme requirements. Network slicing offers an effective way to unlock the full potential of 5G networks and meet those requirements on a shared network infrastructure. This paper presents a cloud native approach to network slicing. The cloud ...

August 01, 2017

Modeling and simulation of RSOA with a dual-electrode configuration

  • De Valicourt G.
  • Liu Z.
  • Violas M.
  • Wang H.
  • Wu Q.

Based on the physical model of a bulk reflective semiconductor optical amplifier (RSOA) used as a modulator in radio over fiber (RoF) links, the distributions of carrier density, signal photon density, and amplified spontaneous emission photon density are demonstrated. One of limits in the use of RSOA is the lower ...

July 12, 2017

PrivApprox: Privacy-Preserving Stream Analytics

  • Chen R.
  • Christof Fetzer
  • Le D.
  • Martin Beck
  • Pramod Bhatotia
  • Thorsten Strufe

How to preserve users' privacy while supporting high-utility analytics for low-latency stream processing? To answer this question: we describe the design, implementation and evaluation of PRIVAPPROX, a data analytics system for privacy-preserving stream processing. PRIVAPPROX provides three properties: (i) Privacy: zero-knowledge privacy (ezk) guarantees for users, a privacy bound tighter ...