In order to overcome the effects of degradation of the optical signal caused by transmission impairments, regenerators are placed at some intermediate nodes to regenerate the signal to its original level. Regeneration requires the signal to be dropped locally, regenerated and retransmitted back into the network. This process involves provisioning for required number of transceiver pairs at this...

Physical transceiver implementations for wireless communication systems usually suffer from transmit-radio frequency (Tx-RF) and receiver-RF (Rx-RF) impairments. In this paper, we aim to design efficient coordinated beamforming for multicell multiuser multi-antenna systems by fully taking into account the residual transceiver impairments. Our design objectives include both spectral efficiency a...

The long links that interconnect networking and computing systems and boards need high throughput to avoid expensive, massively parallel connections. However, long wires suffer signal losses that increase with frequency. Digital communication techniques can compensate for these losses, but require Analog-to-Digital and Digital-to-Analog converters (ADCs and DACs). To understand the application ...

INTRODUCTION Microstrip transceiver arrays have been demonstrated to provide higher efficiency on signal excitation/reception and low mutual coupling and have become a popular RF solution to parallel MR imaging at ultrahigh fields in humans [1,2]. In most designs, the ground planes of microstrips are separated (Fig 1) to minimize their mutual coupling [1-5]. Practically, due to space limitation...

We demonstrate for the first time system-level locking RF transceivers serving as an anti-piracy security technique. The strategy is to make performance key-dependent by leveraging a state-of-the-art logic technique obfuscate digital blocks in signal path. presents several advantages, including general applicability, effective incorrect keys, attack resilience, transparency when correct key use...