A 802.11g and UMTS Simultaneous Reception Front-End Architecture using a double IQ structure

International audienceIn this paper, we address the architecture of multistandard simultaneous reception receivers and we aim to reduce the complexity of the analog front-end. To this end, we propose an architecture using the double orthogonal translation technique in order to multiplex two signals received on different frequency bands. A study case concerning the simultaneous reception of 802.11g and UMTS signals is developed in this paper. Theoretical and simulation results show that this type of multiplexing does not significantly influence the evolution of the signal to noise ratio of the signals

Low Power Multistandard Simultaneous Reception Architecture

International audienceIn this paper, we address the architecture of multistandard simultaneous reception receivers and we aim at improving both the complexity and the power consumption of the analog front-end. To this end we propose an architecture using the double orthogonal translation technique in order to multiplex two received signals. A study case concerning the simultaneous reception of 802.11g and UMTS signals is developed in this article

Multiband Simultaneous Reception Front-End with Adaptive Mismatches Correction Algorithm

International audienceThis paper addresses the architecture of multistandard simultaneous reception receivers and aims at improving the performance-power-complexity trade-off of the front-end. To this end we propose a single front-end architecture offering lower complexity and therefore lower power consumption. In order to obtain the same performance as the state of the art receivers, a light weight adaptive method is designed and implemented. It uses a mix of two digital implemented algorithms dedicated to the correction of the frontend IQ mismatches. A study case concerning the simultaneous reception of 802.11g and UMTS signals is developed in this article

Candidate Architecture for MIMO LTE-Advanced Receivers with Multiple Channels Capabilities and Reduced Complexity and Cost

International audienceIn this paper, a candidate architecture for LTEAdvanced receiver is proposed. Based on the combination of MIMO techniques and flexible spectrum access, LTE-Advanced terminals will require an increasing complexity of the front-end part. To reduce the complexity of the analog front-end, an innovative architecture is introduced based on the merging between the double IQ and code multiplexing structure. Simulation results show that, in a Gaussian case, the bit error rate does not increase significantly when using this architecture. A complexity evaluation study reveals significantly reduced power consumption when implementing the proposed single front-end architecture

Full-Duplex Dual-Band Radio Dedicated to Flexible Radio Communications

This report presents the design of Full-Duplex Dual-Band radio which allows simultaneous transmission and reception in two separate spectrum fragments by combining the Full-Duplex radios and Dual-Band RF front-end. Our design employs two antennas, each one being used for simultaneous transmitting and receiving. To overcome the self-interference (SI) induced by the Full-Duplex radios, simple band pass lters (BPF) are utilized to suppress the inner SI and active analog self-interference cancellation (AASIC) method is used to cancel the inter SI. The two radio frequency (RF) signals corrupted individually by the residual SI are down-converted by the double I/Q structure. Then, the two output baseband signals are processed by the corresponding base-band receivers. We theoretically analyze and evaluate by simulation this Full-Duplex Dual-Band radio operating on the standard WiFi OFDM PHY in two separate spectrum fragments.Ce rapport presente le design d'un systeme radio Full-Duplex dual-band qui permet la transmission et la reception en simultanees de deux fragments de spectre separes en combinant l'approche Full-Duplex a un frontal RF dual-bande. Notre structure requiere deux antennes, chacune etant utilisee pour l'emission et la reception simultanement. Pour resoudre le probleme d'auto-interference (SI) induit par le Full-Duplex, de simples filtres passe-bande (BPF) sont utilises pour supprimer l'auto-interference interne et une suppression active de l'auto-interference au niveau analogique (AASIC) est ajoutee pour supprimer l'auto-interference croisee. Les deux signaux RF brouilles par l'auto-interference residuelle sont transposes en bande de base pour une structure a double IQ. Alors, chaque signal obtenu en bande de base est demodule par le recepteur approprie. Nous presentons ici une analyse theorique et une evaluation en simulation de cette architecture Full-Duplex Dula-Band fonctionnant sur le standard WiFi OFDM dans deux bandes separees

A new vision of software defined radio: from academic experimentation to industrial explotation

The broad objective of this study is to examine the role of Software Defined Radio in an industrial field. Basically examines the changes that have to be done to achieve moving this technology in a commercial domain. It is important to predict the impacts of the introduction of Software Defined Radio in the telecommunications industry because it is a real future that is coming. The project starts with the evolution of mobile telecommunications systems through the history. Following this, Software Defined Radio is defined and its main features are commented such as its architecture. Moreover, it wants to predict the changes that the telecommunications industry will might suffer with the introduction of SDR and some future structural and organizational variations are suggested. Additionally, it is discussed the positive and negative aspects of the introduction of SDR in the commercial domain from different points of view and finally, the future SDR mobile phone is described with its possible hardware and software.Outgoin

D21.3 Analysis of initial results at EuWIN@CTTC

Deliverable D21.3 del projecte europeu NEWCOM#The nature of this Deliverable of WP2.1 (“Radio interfaces for next-generation wireless systems”) is mainly descriptive and its purpose is to provide a report on the status of the different Joint Research Activities (JRAs) currently ongoing, some of them being performed on the facilities that are available at EuWInPeer ReviewedPreprin

Radio Communications

In the last decades the restless evolution of information and communication technologies (ICT) brought to a deep transformation of our habits. The growth of the Internet and the advances in hardware and software implementations modified our way to communicate and to share information. In this book, an overview of the major issues faced today by researchers in the field of radio communications is given through 35 high quality chapters written by specialists working in universities and research centers all over the world. Various aspects will be deeply discussed: channel modeling, beamforming, multiple antennas, cooperative networks, opportunistic scheduling, advanced admission control, handover management, systems performance assessment, routing issues in mobility conditions, localization, web security. Advanced techniques for the radio resource management will be discussed both in single and multiple radio technologies; either in infrastructure, mesh or ad hoc networks