Millimeter-Wave System for High Data Rate Indoor Communications

This paper presents the realization of a wireless Gigabit Ethernet communication system operating in the 60 GHz band. The system architecture uses a single carrier modulation. A differential encoded binary phase shift keying modulation and a differential demodulation scheme are adopted for the intermediate frequency blocks. The baseband blocks use Reed- Solomon RS (255, 239) coding and decoding for channel forward error correction (FEC). First results of bit error rate (BER) measurements at 875 Mbps, without channel coding, are presented for different antennas.Comment: 5 page

Single Carrier Architecture for High Data Rate Wireless PAN Communications System

A 60 GHz wireless Gigabit Ethernet (G.E.) communication system is developed at IETR. As the 60 GHz radio link operates only in a single-room configuration, an additional Radio over Fibre (RoF) link is used to ensure the communications in all the rooms of a residential environment. The realized system covers 2 GHz bandwidth. Due to the hardware constraints, a symbol rate at 875 Mbps is attained using simple single carrier architecture. In the baseband (BB) processing block, an original byte/frame synchronization process is designed to provide a smaller value of the preamble missing detection and false alarm probabilities. Bit error rate (BER) measurements have been realized in a large gym for line-of-sight (LOS) conditions. A Tx-Rx distance greater than 30 meters was attained with low BER using high gain antennas and forward error correction RS (255, 239) coding.Comment: Design, Experimentation, Measurement, Performance; IWCMC '10, Caen : France (2010

Toward a Gigabit Wireless Communications System

This paper presents the design and the realization of a hybrid wireless Gigabit Ethernet indoor communications system operating at 60 GHz. As the 60 GHz radio link operates only in a single-room configuration, an additional Radio over Fiber (RoF) link is used to ensure the communications within all the rooms of a residential environment. The system uses low complexity baseband processing modules. A byte synchronization technique is designed to provide a high value of the preamble detection probability and a very small value of the false detection probability. Conventional RS (255, 239) encoder and decoder are used for channel forward error correction (FEC). The FEC parameters are determined by the tradeoff between higher coding gain and hardware complexity. The results of bit error rate measurements at 875 Mbps are presented for various antennas configurations

Indoor Channel Characterization and Performance Analysis of a 60 GHz near Gigabit System for WPAN Applications

ISBN 978-953-7619-X-

60 GHz High Data Rate Wireless Communication System

This paper presents the design and the realization of a 60 GHz wireless Gigabit Ethernet communication system. A differential encoded binary phase shift keying modulation (DBPSK) and differential demodulation schemes are adopted for the IF blocks. The Gigabit Ethernet interface allows a high speed transfer of multimedia files via a 60 GHz wireless link. First measurement results are shown for 875 Mbps data rate.Comment: 5 pages

Système de Communications Sans Fil Très Haut Débit à 60 GHz

National audienceThis paper presents the study and the realization at IETR of a high data rate 60 GHz wireless communications system. The system uses a simple single carrier architecture. The receiver architecture is based on a differential demodulation which minimizes the intersymbol interference (ISI) effect and a signal processing unit composed of a joint frame and byte synchronization block and a conventional RS (255, 239) decoder. The byte synchronization technique provides a high preamble detection probability and a very small value of the false detection probability. First measurement results show a good communication link quality in line of sight environments with directional antennas

A low Complexity Wireless Gigabit Ethernet IFoF 60 GHz H/W Platform and Issues

6 pagesInternational audienceThis paper proposes a complete IFoF system architecture derived from simplified IEEE802.15.3c PHY layer proposal to successfully ensure near 1 Gbps on the air interface. The system architecture utilizes low complexity baseband processing modules. The byte/frame synchronization technique is designed to provide a high value of preamble detection probability and a very small value of the false detection probability. Conventional Reed-Solomon RS (255, 239) coding is used for Channel Forward Error Correction (FEC). Good communication link quality and Bit Error Rate (BER) results at 875 Mbps are achieved with directional antennas

Hybrid, Optical and Wireless Near-Gigabit Communications System

This paper presents the study and the realization of a hybrid 60 GHz wireless communications system. As the 60 GHz radio link operates only in a single-room configuration, an additional Radio over Fibre (RoF) link is used to ensure the communications in all the rooms of a residential environment. A single carrier architecture is adopted. The system uses low complexity baseband processing modules. A byte/frame synchronization technique is designed to provide a high value of the preamble detection probability and a very small value of the false alarm probability. Conventional RS (255, 239) encoder and decoder are used to correct errors in the transmission channel. Results of Bit Error Rate (BER) measurements are presented for various antennas configurations

Hardware implementation study of a wireless transmission combining time reversal and OFDM

L’essor spectaculaire des systèmes de communications sans fil a entrainé une forte augmentation du trafic des données qui ne devrait cesser de croître au cours des prochaines années. La future génération de réseaux cellulaires (5G) doit être capable de supporter cette croissance du trafic, tout en présentant une consommation énergétique réduite par rapport aux réseaux existants. Parmi les différentes technologies étudiées, le retournement temporel (RT) se présente comme un sérieux candidat pour répondre à ces contraintes. En effet, les nombreuses études théoriques sur le sujet ont montré que la combinaison du RT et de l’OFDM possède des performances intéressantes, notamment grâce à ses propriétés de compression temporelle et de focalisation spatiale. Cependant, les hypothèses prises dans les études théoriques ne sont pas toujours compatibles avec la réalisation pratique d’un tel système. L’objectif de ces travaux de thèse est donc de proposer des solutions aux hypothèses non réalistes, afin de les mettre en oeuvre dans la réalisation d’un prototype combinant RT et OFDM dans un contexte MISO. Dans un premier temps, la mise en oeuvre de l’estimation du canal au niveau de l’émetteur et de la synchronisation du système MISO RT-OFDM est étudiée. Ensuite, une solution de calibration au niveau de l’émetteur est proposée pour compenser le caractère non réciproque du canal de propagation vu de la bande de base. L’ensemble de ces solutions ainsi que les propriétés de focalisation du RT sont validés à partir de mesures expérimentales sur le prototype réalisé. Enfin, la mise en oeuvre du premier prototype de modulation spatiale à la réception utilisant le RT est présentée.The spectacular growth of wireless communications systems has led to a sharp increase in data traffic, which should continue to grow over the next few years. The future generation of cellular networks (5G) must be able to support this growth of traffic, while presenting reduced energy consumption compared to existing networks. Among the different studied technologies, time reversal (TR) is a serious candidate to meet these constraints. Indeed, the numerous theoretical studies on the subject have shown that the combination of TR and OFDM has interesting performance, specifically thanks to its temporal compression and spatial focusing properties. However, the assumptions made in the theoretical studies are not always compatible with the practical implementation of a real system. The objective of this thesis is to propose solutions to unrealistic theoritical hypotheses, in order to implement them in a real hardware prototype combining TR and OFDM in a MISO context. First, the implementation of the channel estimation at the transmitter side, and the synchronization of the MISO TR-OFDM system is studied. Then, a calibration solution at the transmitter is proposed to compensate for the non-reciprocal nature of the baseband propagation channel. All these solutions as well as the focusing properties of TR are validated by experimental measurements using the developed prototype. Finally, the implementation of the first TR prototype of spatial modulation at the receiver side is presented

Mesures expérimentales de modulation spatiale : implémentation sous WARP

Séminaire des jeudis de la com' de l'équipe SCNLa modulation spatiale à la réception, aussi appelé Receive Antenna Shift Keying (RASK) est une nouveau type de modulation qui permet d'aboutir à un récepteur de faible complexité. Au lieu de coder l'information par une modulation de phase et/ou d'amplitude, la modulation spatiale à la réception code l'information en focalisant le signal envoyé vers une des antennes du récepteur. Ainsi la démodulation se fait en détectant l'indice de l'antenne qui est la cible de la focalisation. Dans cette présentation, après avoir introduit le principe du RASK, nous présentons la réalisation d'un prototype mettant en oeuvre une combinaison de RASK et d'OFDM. Nous clôturons ensuite en présentant les premiers résultats de mesure obtenus