Joni Jantunen

A 112Mb/s full duplex remotely-powered impulse-UWB RFID transceiver for wireless NV-memory applications

A dual band symmetrical RFID transceiver for high capacity wireless NV-memory applications is reported. The circuit exhibits a FOM of 58pJ/b and 48pJ/b in Tx and Rx respectively, with a 112Mb/s data rate capability. It operates in the 7.9GHz UWB frequency band for full duplex communication and is remotely powered thru a UHF CW. The circuit is fabricated in a 0.13µm 1.2V CMOS process.

A 112 Mb/s Full Duplex Remotely-Powered Impulse-UWB RFID Transceiver for Wireless NV-Memory Applications

A dual band symmetrical UWB-RFID transceiver for high capacity wireless NV-Memory applications is reported. The circuit exhibits a figure of merit of 58 pJ/b and 48 pJ/b in Tx and Rx respectively, with a 112.5 Mb/s data rate capability. It operates in the 7.9 GHz UWB frequency band for full duplex communication and is remotely powered through a UHF CW signal. The circuit has been implemented in a 0.13 μm 1.2 V CMOS process.

A New Symmetric Transceiver Architecture for Pulsed Short-Range Communication

This paper proposes a novel symmetric super- regenerative transceiver architecture for pulsed short-range communication. The proposed architecture is targeted for wireless applications where ultra low power consumption and data-rate in tens of megabits per second are needed over distances in the range of tens of centimeters. The transmitter and receiver are both based on super-regenerative principle and both functions in the transceiver utilize one mutual super-regenerative oscillator. Additionally, the transceiver architecture allows fast synchronization of transceivers thanks to the delayed reflection phenomenon which makes it possible to detect correct timing simultaneously at both ends of the system. Measurement results demonstrate the feasibility of the proposed principle.

Wireless transceivers for gigabit-per-second communications

This paper presents a state-of-the-art of wireless transceivers providing Gbps data-rate. This study focuses on the power consumption of such systems and puts it into balance with respect to the data-rate through the energy efficiency and with respect to the communication distance through a new Figure-of-Merit. An analysis of this state-of-the-art is also proposed which gives a new perspective on Gbps wireless systems.

Connection set-up and synchronization in RF memory tag system

In this paper, we propose a connection set-up procedure and a simplified protocol for the synchronization of super-regenerative impulse UWB transceivers in a RF memory tag system. The protocol utilizes efficiently the features of the super-regenerative transceiver architecture, such as the short Tx-Rx switching time enabling responses on pulse level. The proposed communication system is designed so that the timing of transmission and reception can be fixed on pulse level for bi-directional communication which efficiently minimizes the need of preambles and resynchronization on packet level.

Integration and uses of RF Memory Tags with Smart Space Semantic Web middleware

As devices become more ubiquitous and information more pervasive, technologies such as semantic Web and space-based computing come to the fore as a platform for user-interaction with their environment. Integrating technologies such as advanced RF memory tag with mobile devices and combining this with computation platforms such as those supporting semantic Web principles provides innovative and novel applications for the user. In a way, information stored in smart spaces on RF memory tags could even create a sub-Internet of Things where users are the main information transport mechanism rather than the Internet.

Implementation and verification of a new impulse UWB radio system with HF/UHF remote-powering for passive wireless memory tags

In this paper, we present for the first time a complete impulse UWB radio system implementation for remotely-powered wireless memory tag applications. A narrow-band signal, either 13.56 MHz or 900 MHz, is used for remote-powering, and the communication link is based on impulse UWB communication at 7.9 GHz centre frequency. A fully integrated transceiver optimised for tags has been implemented and used also in the reader/writer device. The air-interface of the remotely-powered transceiver operates up to 112 Mbit/s with ultra-low energy consumption per bit (Tx mode: 87 pJ/bit, Rx mode: 80 pJ/bit). A complete system demonstrator including a remotely-powered 64-Mbit memory tag has been built to test and verify the concept. The results confirm the feasibility of solely remotely-powered wireless memory tags.

Dual-Interface Memory for RF Memory Tag Systems

In the simplest form the RF memory tag system consists of a stand-alone memory tag with a large non-volatile storage memory (capacity in gigabits), and a reader/writer device. The reader/writer device powers the tag wirelessly during data-transfer. An RF memory tag can be also embedded into an electronic device providing wireless access to storage memory even when the device is without a battery or the battery is empty. This enables totally new applications but set also new requirements for the memory devices. In this paper we analyze the requirements and propose dual-interface memory architecture for the RF memory tag systems.