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In this paper, the performance analysis of two different diversity models in indoor milli-meter wave communication in presented. Two diversity models considered here are Switch and Stay combining(SSC) diversity and Switch and Examine combining(SEC) diversity. Arbitrary number of received signals are examined and processed using the above mentioned diversity techniques. The L outputs of each combiner...
This paper presents an extrinsic information transfer (EXIT) chart based irregular repeat-accumulate (IRA) code design technique for a two-dimensional magnetic recording (TDMR) turbo-equalizer that employs a Voronoi magnetic grain model. The channel model also includes two-dimensional inter-symbol interference (2D-ISI) and additive white Gaussian noise (AWGN). At high bit densities (e.g., between...
Main purpose of this study is to design and experimenting about basic infrastructure of the communication system VLC especially on the physical components that consist of transmitter unit and receiver unit. The specific purpose is to evaluating the performance of LEDs as a component of the receiver in the communication system and its influence if arranged in parallel. In this study, Red LASER diode...
Continuous health monitoring has become feasible, largely due to miniature implantable sensor systems such as [1]. To recharge batteries of such systems, wireless power transfer is a popular option since it is non-invasive. However, there are two main challenges: 1) strict safety regulations of incident power on human tissue; 2) small coil size for better biocompatibility. These issues reduce the...
The consumer electronics market demands high-speed and low-power serial data interfaces. The injection locked oscillator (ILO) based clock and data recovery (CDR) circuit [1–2], is a well-known solution for these demands. The typical solution has at least two oscillators: a master and one or more slaves. The master, a replica of the data path ILO, is part of a phase locked loop (PLL) used to correct...
This article discusses the detection problem of a passive multistatic radar system with a non-cooperative illuminator of opportunity in the presence of compensation errors. Two detectors are used to address this detection problem according to whether the noise powers in the receivers are equal or not. Both of them have a constant false alarm rate with respect to the noise power. Numerical examples...
This paper presents the technique to resolve multipath component at the receiver under the assumption of wideband channel. It has been proved that linear receivers show low complexity to detect MIMO signals. An algorithm is proposed to select the best multipath component of the transmitted signal in the presence of a linear Zero Forcing detector. On the basis of QR decomposition of the received multipath...
MIMO technology increases channel capacity and data rates using multiple antennas and multiple receiver chains. In wideband scenario, each receiver has multiple copies of estimated channel matrices, and selection of a well conditioned channel matrix is required for faithful detection. There are ample of methods reported for channel estimation. This paper presents an algorithm which selects a desired...
The chip to chip data link receiver is implemented with the non-resonant plasma wave detector at 250 GHz. The receiver is composed with on-chip patch antenna, stacked FET detector, and limiting amplifier. The stacked FET detector detect THz signal by non-resonant plasma wave transistor. The non-resonant plasma wave transistor is based on the broadband direct detection well beyond the cutoff frequency...
A pulsed time-of-flight laser radar based on a high speed/energy optical transmitter and a SPAD-TDC receiver is presented. The transmitter employs a bulk double heterostructure laser diode operating in enhanced gain switching mode at a wavelength of ∼870nm, giving ∼1nJ/125ps optical pulses. The receiver is a single CMOS chip consisting of a 9×9 CMOS SPAD array and a 10-channel 10ps precision TDC....
A 1Mb/s, 2.4GHz, Manchester encoded and error adaptive OOK transceiver has been designed in a 65nm CMOS process. The transceiver achieves 10−3 bit error rate at −70dBm receiver input power for a minimum operating distance of 10 m. The receiver uses an uncertain IF architecture for RF to IF conversion and a digital energy detection for backend baseband processing. A digital processor of decoded Manchester...
A continuous-time low-pass sigma-delta modulator (ΣΔM) with a chain of integrators and weighted capacitive feedforward (CICFF) summation topology is fabricated by tsmc 0.18 um CMOS process. This proposed including health transducer with wireless charging and WuRx front-end on tracheostomy tube for microsystems technology in hospital. The summation of feedforward signals is implemented by the weighted...
In this paper, we provides a comparison of low-complexity MIMO detector, including linear MMSE receiver with a capacity-approaching channel code. The impact of soft-decision provided by MIMO detection plays an important role especially when using capacity-approaching codes. Here, our focus is on linear MMSE receiver with soft-decision output, a.k.a., log-likelihood ratio, and its approximate version...
This paper presents a low power Impulse-Radio Ultra-WideBand (IR-UWB) receiver for low range and low data rates applications. The receiver adopts a non coherent detection with duty cycling that allows very low power consumption. The receiver operates in the high band of the UWB frequency band. It has been designed for the 7.2-8.5GHz bandwidth and covers channels 8, 9, 10, and 11 of the IEEE 802.15...
In urban environments GNSS code multipath errors can cause large positioning errors. Many existing approaches try to overcome these errors employing Kalman innovations or statistical tests for code and carrier similarity. In this paper a new multipath model for time-differential code measurement errors is found from measurement data. The data indicates that the stochastic code error of multipath-affected...
Sparse code multiple access (SCMA) is a promising multiplexing approach to achieve high system capacity. In this paper, we develop a novel iterative detection and decoding scheme for SCMA systems combined with Low-density Parity-check (LDPC) decoding. In particular, we decompose the output of the message passing algorithm (MPA) based SCMA multiuser detection into intrinsic part and prior part. Then...
Nyquist rate sampling of ultra-wideband (UWB) signal is prohibitively costly and UWB receivers suffer from narrowband interference (NBI). In this paper, we present a compressed sensing (CS) based UWB receiver scheme with the capability of NBI mitigation. The key issue is to refine the measurement matrix according to the signal subspace and the NBI subspace such that the energy of the UWB signal can...
While transistor density continues to increase according to Moore's law, Dennard scaling ruling the downsizing of transistor power has broken down due to the increasing rise of leakage occurring in submicron technologies. With every process generation the speed at which transistors can be switched is increasingly exceeding the capacity to dissipate the generated heat, fact that demands highly energy-efficient...
Devices that harvest power from radio-frequency (RF) signals are generally referred to as RF-powered devices. One emerging technology that enables RF-powered devices to communicate with others is ambient backscatter. In this paper, we study the problem of signal detection and analyse the uplink bit error rate (BER) performance for RF-powered devices utilizing ambient backscatter. Specifically, we...
The mathematical model of the demodulating logarithmic amplifier has been developed. The one-dimensional probability density of a random process at the output of the logarithmic detector has been obtained. Change in the law of distribution for different values of signal-to-noise ratio at the input has been investigated.
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