The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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...
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...
An Impulse Radio Ultra Wide Band (IR-UWB) On Off Keying (OOK) non-coherent receiver for biomedical devices is presented in this study. The proposed receiver is operated on a 3–7GHz frequency band. It is made up of resistive feedback low noise amplifier, a buffer and an OOK demodulator. The squarer absence explains the good performance of the LNA. Implemented in 180 nm CMOS technology, the receiver...
This work presents a broadband 60-GHz heterodyne receiver with digital calibration. In the LNA, low-coupling-coefficient transformer based matching networks are employed to improve its RF bandwidth. Digital gain control and phase tuning schemes are used for the receiver gain tuning and I/Q mismatch calibration. Measurement results show that the conversion gains of 75 dB (the high-gain mode) and 20...
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.
This paper presents a wideband receiver design used for LTE system with frequency range from 400MHz to 6GHz. Superheterodyne architecture is adopted for high performance. The details of the wideband receiver are introduced in this paper. The wideband receiver is integrated on a six-layer PCB with small size, low power consumption and high accuracy. The measured results show that the wideband receiver...
This paper presents the design and implementation of a complete communication system using the GMSK modulation scheme. The hardware is described in VHDL and implemented on Altera FPGA. Additionally, each block used to perform the implementation is completely described accomplishing all the requirements of this kind of modulation. Mueller & Müller algorithm is also performed to ensure timing synchronization...
This article provides an overview of the Digital Video Broadcasting - Satellite (DVB-S) specifications and the context of its extension to mobility. Different ways for receiving digital television on mobile devices are summarized. Then, the overall demonstrator from the antenna to the baseband signal processing is presented. Some attention is paid to the analog channel selection and QPSK frequency...
Bit-interleaved coded modulation with iterative decoding (BICM-ID) performs well under a variety of channel conditions. Based on a factor graph representation of BICM-ID, we propose a modification of the BICM-ID receiver that can reduce the computational complexity significantly without BER degredation. The basic idea is to avoid updates of code bit log-likelihood ratios whose magnitude is already...
A Doppler estimation system using a maximum likelihood criterion is presented in the context of underwater acoustic communications between moving transmitter/receiver. We simulate the method for the estimation of the Doppler effect induced by an underwater acoustic channel (UWA) using Zero Padded-Orthogonal Frequency Division Multiplexing (ZP-OFDM). Among the wide range of physical processes that...
In this paper, we present characterization of multipath propagation channel for 2.4 GHz carrier. The effect of relative movement between transmitter and receiver and its effect on channel characteristics in terms of Doppler spread in frequency domain are also discussed. Based upon this, a model is explored, which enable us to map the fading characteristics into the received envelope power and hence...
Efficient use of spectrum requires an accurate determination of interference effects. In this paper, we introduce a radio to radio (R2R) factor that quantifies the interference effects of one radio waveform on another based on multiple waveform properties instead of solely on intermediate frequency (IF) signal power. The R2R factor is formulated as a dimensionless correction term in the victims communication...
In chaos communication schemes, the differential chaos shift keying(DCSK) is a noncoherent scheme with correlation detector. In spite of this there is currently no established procedures attaching importance to the correlation of noises within a code period, which is one of the reasons for the degradation of performance of DCSK system. This paper put forward an improved scheme for noise reduction...
In this paper, we present the design and implementation of a PLC (Power-Line Communication) Modem based on Orthogonal Frequency Division Multiplexing (OFDM). The PLC device implements OFDM in both transmitter and receiver using VHDL programming. The OFDM processor is synthesized in a Field Programmable Gate Array (FPGA) that acts as a Core Processor in the PLC Modem. Furthermore, the prototype includes...
We experimentally demonstrate simultaneous demodulation of wavelength division multiplexed (WDM) DQPSK signals with a single arrayed waveguide grating (AWG). We then compare this receiver to the conventional one in presence of nonlinear phase noise.
This paper studies the BER performance of a multiband UWB system with a common RF and ADC module in the receiver. Communication signals in multiple RF bands are received by one UWB antenna. The ADC samples the received signal in a swath. This means that the RF signals with lower frequencies are oversampled. Using the ADC output signal, the demodulator demodulates each RF signal individually. The quantization...
This paper designs and accomplishes a fast frequency hopping system with 40 Khps based on the software radio. The paper presents several innovational techniques for realizing hopping system, such as frequency hopper, frequency hopping sequence, bit synchronization, hopping pattern synchronization, hopping signal demodulation, etc. Then the paper presents system's detailed hardware/software architecture...
Superposition interference cancellation (SIC) has been highlighted due to its high spatial reuse efficiency in wireless networks. It exploits superposition aspect of multiple signals to cancel interferences. We present three basic SIC schemes, which are (1) superposition demodulation scheme, (2) superposition decoding scheme and (3) iterative superposition decoding scheme in this paper. When selecting...
This paper describes the design and implementation of a fully differential RF front-end chipset for a low data rate FM-UWB based P-PAN receiver. The chipset includes an ultra-wideband LNA and a wideband RF demodulator. A 0.18 mum standard CMOS RF process is chosen as the technology vehicle. Measurement and demodulation function verification are presented in the paper. The measurement results show...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.