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In conventional hybrid PNoC systems, the end-to end optical data transfer is accompanied with electrical control functions including path-setup, acknowledgment, and tear-down. These functions directly a ect the performance and power characteristics of these circuit-switching based systems. In this paper, we propose a novel hybrid PNoC system, named PHENIC-II. 1 Thanks to the adopted non-blocking photonic...
In this paper we consider Generalized Pre-coding aided Spatial Modulation (GPSM), which was recently proposed as a promising alternative to conventional Multiple Input Multiple Output (MIMO) transmission schemes. In GPSM only a part of the receive antennas is activated with the aid of pre- coding at the transmitter. Hence, information bits are mapped to a spatial symbol, corresponding to a particular...
Crosstalk noise can significantly reduce data transfer reliability in emerging photonic network-on-chip (PNoC) architectures. Undesirable mode coupling between photonic signals at microring resonators (MR) is the main cause of crosstalk in photonic waveguides. As emerging PNoC architectures employ dense wavelength division multiplexing (DWDM) with multiple cascaded MRs, these architectures suffer...
We develop a robust multiuser detector for a Frequency Division Multiplexing (FDM) system where each user employs a binary continuous phase modulation (CPM) generated through a low-cost transmitter, thus characterized by a significant modulation index uncertainty, and sent over a channel affected by phase noise. In this FDM system the spectral efficiency can be increased by reducing the spacing between...
We report successful demonstration of individual readout of the response to an optical signal in serially-connected superconducting strip line detectors (SSLDs). Based on the numerical analysis, placement of low-pass filters between adjacent SSLDs and use of a current-source drive enable serially-connected SSLDs to work as independent multiple SSLDs. This leads to reduction of the number of cables...
Resilience to cross-phase modulation (XPM) can be improved by employing multicarrier modulation formats. The impact of the number of subcarriers on the achievable information rate is discussed and a possible XPM compensation strategy is suggested.
A record low energy (250fJ/bit) intra-chip electronic-photonic link is demonstrated at 5Gb/s on a 3D-integrated wafer using through-oxide-vias (1.45fF-per-via) for the first time. The receiver sensitivity was −19.3dBm and the on-chip laser energy was 6fJ/bit.
This paper presents an ultra-low power analog front end (AFE) with ΣΔ modulator ADC meant for acquisition of biopotential signals. The system consists of a signal conditioning stage with programmable gain and bandwidth, a mixed signal automatic gain control (AGC), and a ΣΔ ADC. The full system is designed in UMC 18μm CMOS. The AFE achieves an overall linearity of more 10 bits with 0.47μW power consumption...
Achieving an increase in the spectral efficiency (SE) has always been a major driver in the design of communication systems. The use of MIMO techniques in mobile communications has achieved significant benefits in improving the system throughput. The basic underlying concept of MIMO is to exploit the signal and channel characteristics to eliminate interference between multiple transmissions. Departing...
We propose a dual-polarization signal-carrier interleaved direct detection (DP-SCI-DD) scheme to achieve 100% spectrum efficiency with reference to single polarization coherent detection. The channel is modeled as a discrete time Gaussian channel with conjugate inter-symbol interference.
The objective of this work is to design and implement a novel framework for automatic signal classification techniques (FACT) for software defined radios (SDR) capable of classifying multiple signals simultaneously. The focus of this work is to create a modular classification framework to facilitate the testing and implementation of new classification methods. The framework is divided into three parts:...
In this paper, we study the design of sparse graph based codes for Faster-Than-Nyquist (FTN) signaling. Using an asymptotic approach based on EXIT charts, we show that good low-density parity check codes can be designed that perform well under iterative detection and decoding and that have better performance than a FTN scheme using a code optimized for the additive white Gaussian noise channel.
In this work we present a low-complexity detection scheme for spatial modulation (SM) systems in the large-scale multiple access channel (MAC). The proposed strategy is based on compressive sensing (CS) and it exploits the sparsity and structure of the transmitted SM signals in the MAC to enhance the detection performance. The analytical and simulation results presented in this paper show that the...
Rotational modulation collimation (RMC) is a technique commonly used for standoff imaging of radiological sources in the context of homeland security. The paper presents a novel method for gamma ray image reconstruction from modulation signals acquired by a RMC detector prototyped by DSTO. The image is represented in a parametric form as a weighted sum of Gaussian radial basis functions. The problem...
This paper investigates the performance of IEEE 802.11ac physical layer (PHY) when the following multiple input multiple output (MIMO) detectors are implemented: Sphere Decoding (SD); QRM-Maximum Likelihood (QRM-MLD); List Minimum Mean Squared Error Successive Interference Cancellation (List MMSE-SIC); List Zero-Forcing SIC (List ZF-SIC); Lattice Reduction MMSE-SIC (LR MMSE-SIC) and List LR MMSE-SIC...
The uniform DFT filter bank has been used routinely in discrete multitone modulation (DMT) systems because of implementation efficiency. It has recently been shown that principal component filter banks (PCFB) which are known to be optimal for data compression and denoising applications, are also optimal for a number of criteria in DMT communication. In this paper we show that such filter banks are...
We propose a reduced complexity maximum likelihood detection technique for coded 16 level differentially encoded amplitude phase shift keying modulation in amplify-and-forward relaying system. This method eliminates the need for pilot symbols for channel estimation, equalization and there is no need for accurate phase tracking at the receiver which is particularly important in Relay aided cooperative...
A mobile receiver with angular diversity detectors in Visible Light Communication (VLC) Multiple Input Multiple Output (MIMO) channels is considered. The objective is to improve the rank of the channel matrix and hence system throughput. Repetition Coding, Spatial Multiplexing and Spatial Modulation concepts are used to evaluate throughputs across multiple locations in a small room scenario. Since...
We investigate the detector design in generalized space shift keying (GSSK) modulation for large MIMO systems. An orthogonal matching pursuit (OMP) based detector design is adopted due to its low complexity compared with the maximum likelihood (ML) detector. To improve the performance of the OMP algorithm, our first design is to propose an equalizer at the receiver in order to orthogonalize the equivalent...
In this paper, we investigate the performance of generalized spatial modulation (GSM) in indoor wireless visible light communication (VLC) systems. GSM uses light emitting diodes (LED), but activates only of them at a given time. Spatial modulation and spatial multiplexing are special cases of GSM with and $N_{a}=N_t$, respectively. We first derive an analytical upper bound on the...
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