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This paper presents a quadrature pulse-position modulation (Q-PPM) impulse radio (IR) system, and its novel transceiver architecture for E-band wireless communications. In the Q-PPM IR system, the wavelet of the transmitted signal is time-shifted by multiples of 3 ps from the periodic base position. This paper focuses on the receiver architecture for demodulation of the Q-PPM IR signal. The principle...
This paper describes the proposed architecture and the analytical optimization of an ultra-low-power and high sensitivity Resonant Micromechanical Receiver (RMR) to be used in wake-up radios. The proposed radio frequency (RF) system is composed of three different stages: (1) a piezoelectric resonator that provides for passive voltage amplification, impedance matching, and high-Q filtering; (2) a MEMS...
The mobile underwater acoustic channel has brought a great challenge on the encoding and decoding process. The recent development of underwater acoustic processing method aims to get a lower bit error rate(BER). However, the controdiction between lower BER and real-time transmission are not well solved. In this paper, we reach a compromise between them, we combine the turbo code with the adaptive...
In this paper, a novel Memory-Assisted Adaptive-Threshold detection (MAAT) scheme for diffusion-based molecular communications (MC) systems is proposed. The proposed scheme applies to MC systems in which single-type of molecules is assumed to carry the information from the transmitting nano-machine, through a fluid medium, to the receiving nano-machine. The information is represented by the received...
In next generation communication systems high data rate, and higher transmission capacity through wireless channel are important for researchers. Filter bank based multicarrier (FBMC) modulation with offset quadrature amplitude modulation (OQAM) makes researchers interested due to its advantages over orthogonal frequency division multiplexing (OFDM). The paper indicates that OFDM, FBMC-QAM, multiple-input...
Wireless interconnects are capable of establishing energy-efficient intra and inter-chip data communications. This paper introduces a circuit level design of an energy-efficient millimeter-wave (mm-wave) non-coherent on-off keying (OOK) receiver suitable for such wireless interconnects in 45-nm CMOS process. The receiver consists of a simple two-stage common source structure based Low Noise Amplifier...
Well established cable network diagnosis systems rely on reflectometry and transferometry principles to detect faults using specific signals within a frequency spectrum of a few hundreds MHz only. Huge performance improvements in terms of precision and sensitivity can be achieved with higher frequencies and signal modulation, hence revealing phase and amplitude response of the potential impedance...
The joint optimization of partial response continuous phase modulation (CPM) parameters is addressed. For fixed modulation order and memory length, the modulation index, the symbol rate and the phase pulse shape are considered as degrees of freedom. In particular, we drop the restriction of “classical” phase pulses and we allow for custom shapes, which are parametrized through Bezier curves. In order...
This paper describes a method to increase the sensitivity of a digital radio receiver based on the time synchronous averaging (TSA). The data to be send are grouped into a block and the block is retransmitted multiple times. Received blocks are synchronously averaged thus increasing the signal-to-noise ratio. The TSA can be performed on the analog signal at the demodulator output (soft TSA) or on...
A method of adding squared signals of three polarization diversity receiver to overcome the polarization induced fading (PIF) in the optical fibre hydrophone is proposed and experimentally verified. This triple polarization diversity receiver (tri-PDR) is first analysed and theoretically demonstrated. Then, a Mach-Zehnder interferometric sensor with polarization rotator in the reference arm is fabricated...
The intermodulation interference of communication radio affect the normal communication, in which the third-order intermodulation interference can not be avoided. In this paper, the signal characteristics of the third-order intermodulation interference are studied, and the envelope expression of the third-order intermodulation products of different modulation styles and the mathematical expression...
Using ITU-R P.1546 model for propagation loss prediction of airborne ultrashort wave communication. On this basis, we give the calculation formula of signal to interference ratio of the ultrashort wave communication receiver when the enemy using Gaussian white noise for repressive interference. We also give the calculation method of the bit error rate of the digital communication system when it's...
In this paper we analyze adaptive classification algorithm for digital amplitude-phase modulated signals in flat fading channel with non-Gaussian additive noise, representing possible interference in the channel besides thermal receiver noise. We represent additive noise via normal mixture model, which is able to model various interference scenarios by choosing specific mixture parameters. The adaptive...
In this paper, we consider a bit-interleaved coded modulation scheme (BICM) composed of an error correcting code serially concatenated with a M-ary non linear modulation with memory. We first compare demodulation strategies for both the coherent and the non coherent cases. Then, we perform an asymptotic analysis and try to show that the design of coding schemes performing well for both the coherent...
This paper presents an ultra-low power, high-sensitivity, and interference-resistant receiver suitable for IoT applications. By the combination of sliding-IF based low-power down-conversion and relative-power-detection based FSK demodulation, the proposed receiver achieves multi-channel operation and minimizes power consumption. Cascaded N-path filter and 4th-order hybrid-PPF are adopted to improve...
A 4-bit 4Msps successive approximation (SAR) phase-domain analog-to-digital converter (Ph-ADC) for zero intermediate frequency (IF) Bluetooth low energy (BLE) receivers is proposed. With the SAR operation, the Ph-ADC requires only 52 current elements and 1 comparator, in contrast to the conventional design which needs 260 current elements and 8 comparators. Simulation results show that the digital...
This paper proposes a new physical layer security scheme for multiuser multiple-input multiple-output (MIMO) systems under the presence of a passive eavesdropper. In the proposed scheme, the base station (BS) assumes a nonexistent receiver and its corresponding channel responses arbitrarily. Such a receiver and channels are called the imaginary receiver and the imaginary channels in this paper, respectively...
The paper deals with a conception and implementation of selected parts of laboratory experimental receiver for processing Aeronautical VDL2 data link (VHF Data Link mode 2) messages. For acquiring of digitized signal a software defined RTL-SDR receiver is used. Program MATLAB is used for further signal processing. Implementation of message detection, signal filtration, demodulation, symbol and bit...
Wireless power transmission system has been developing rapidly in recent years, and its application is becoming more and more extensive. In order to enhance the stability of the system operation, the communication module used in the transmitting and receiving terminals must be added to the system operation. The paper realizes the receiver and the transmitter chip to execute the signal transmission,...
Orthogonal frequency division multiplexing (OFDM) has been identified as a potential method to enhance the performance of wireless communication links degraded by cosite interference, impulsive noise and frequency selective fading. In this paper, an OFDM software defined radio (SDR) receiver based on a wideband substrate integrated waveguide (SIW) six-port circuit is described and analyzed. A six-port...
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