November 12, 2015

Compact scalable frequency dependent precoding and its FPGA implementation for 5G massive MIMO wireless systems

  • Guan L.

Massive multiple-input multiple-output has been broadly accepted as one of the key candidate technologies for enabling next generation (5G) wireless network. To ensure system performance, an efficient frequency dependent precoding has to be in place to pre-compensate the frequency selective channel response in real time. This Letter presents a compact scalable frequency dependent precoding approach and its area-efficient field programmable gate arrays (FPGA) implementation. The proposed approach has been validated and well compared with other architectures both in the Matlab/Simulink and Xilinx FPGAs.

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Modeling and simulation of RSOA with a dual-electrode configuration

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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 ...

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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 ...