Oleksiy Klymenko

A high band non-coherent impulse radio UWB receiver

This paper describes a monolithic integrated non-coherent receiver intended for impulse radio (IR) Ultra-wide band (UWB) applications including indoor communication and indoor localization. The receiver operates in the higher UWB band centered at 7.68 GHz and it is optimized for a pulse bandwidth of about 1.5 GHz. The overall gain of the receiver amplification chain can be set up to 56 dB in 16 steps via a digital 4-bit interface. A dedicated ldquoleading edgerdquo-detector supports precise indoor localization in conjunction with an appropriate UWB transmitter. A fast comparator indicates the exceeding received signal beyond a threshold set by an internal digital-to-analogue converter (DAC). The circuit was fabricated in 0.25 mum SiGe:C BiCMOS technology.

An impulse radio UWB transceiver with high-precision TOA measurement unit

This paper describes a monolithic integrated transceiver chipset intended for impulse radio (IR) Ultra-wide band (UWB) applications including indoor communication and indoor localization. The chipset operates in the higher UWB band centered at 7.68 GHz and it is optimized for a pulse bandwidth of about 1.5 GHz. The average pulse repetition rate of 60 MHz and an octagonal pulse position modulation (8-PPM) allow for raw data rates up to 180 MBit/sec. The available high bandwidth is used for precise indoor localization employing a dedicated time-of-arrival (TOA) measurement extension. This unit runs with an on-chip system clock of 3.84 GHz, which allows a measurement accuracy of 260 picoseconds. As demonstrated this UWB transceiver chipset is well suited for two-way ranging (TWR) in potentially harsh RF propagation environments. Under perfect line-of-sight conditions a spatial resolution of about 3.9 centimeter could be achieved.

A high band impulse radio UWB transmitter for communication and localization

This paper describes a monolithic integrated transmitter intended for impulse radio (IR) Ultra-wide band (UWB) applications including indoor communication and indoor localization. The transmitter operates in the higher UWB band centered at 7.68 GHz and it is optimized for a pulse bandwidth of about 1.5 GHz. The transmitter generates single pulses with a repetition rate of 60 MHz and utilizes pulse position modulation (8-PPM) for data communication. A dedicated time-of-arrival (TOA) measurement extension supports precise indoor localization in conjunction with an appropriate UWB receiver. The demonstrated spatial ranging resolution is about 3.9 centimeter under line-of-sight conditions.

Time-of-Arrival measurement extension to a non-coherent impulse radio UWB transceiver

This paper describes the extension to a noncoherent impulse radio (IR) ultra-wide band (UWB) transceiver for precise time-of-arrival (TOA) measurements. The extension provides a time resolution of 260 picoseconds, which allows a precise indoor localization. The concept of this extension is especially dedicated to the known drawbacks of energy detection (non-coherent) receivers. The discussion of the implementation issues reveals that the employment of differential emitter- coupled-logic (ECL) circuitry in a BiCMOS design is a good candidate to achieve the expected localization performance in the decimeter range. Finally, recent measurement results can show a proof of that concept.

Fully differential baseband pulse generator for IEEE 802.15.4a standard

This paper presents a fully differential baseband pulse generator intended for Impulse-Radio Ultra-Wideband (IR-UWB) direct up-conversion transmitter architectures. The generator provides impulse related binary phase shift keying (BPSK) and on/off keying (OOK) modulation in accordance with the IEEE 802.15.4a standard. The logic part of the generator runs on a clock of 499.2 MHz allowing direct generation of single preamble impulses as well as data impulse bursts. While the pulse generator is digitally controlled at the input, the output provides an analogue signal ready to be shaped by a low-pass filter (LPF) and up-converted to the desired channel.

IR-UWB single-chip transceiver for high-band operation compliant to IEEE 802.15.4a

This paper describes a monolithic integrated single-chip transceiver intended for impulse radio (IR) - Ultra-wide Band (UWB) applications compliant to the IEEE 802.15.4a standard. The transceiver operates in the higher UWB band on the mandatory channel #9 (7.9872 GHz). The implemented nominal data rate is 850 kb/sec. The presented chip consists of the entire RF-front-end, 6-bit-resolution successive approximation register (SAR) analogue-to-digital converter (ADC), and the baseband processor running with a clock of 31.2 MHz. The analogue frontend can be further segmented into a pulse generation and transmit part and a quadrature direct down conversion receiver part, whereas both parts share a frequency synthesizer based on an integer-N phase-locked loop (PLL). The impulse generation is based on the gated oscillator principle allowing required on-off keying (OOK) as well as binary phase shift keying (BPSK). While the receiver supports both, coherent and non-coherent impulse detection, here only non-coherent operation will be presented. The baseband processor part contains a separated 499.2 MHz clocked block for transmitter control and provides a serial peripheral interface (SPI) for data exchange with an external micro controller. The presented chip was fabricated in a 0.25 μm SiGe:C BiCMOS technology occupying a Si area of 3.25 - 3.25 mm2.

High-band ultra-wideband transmitter for IEEE 802.15.4a standard

This paper presents a monolithically integrated ultra wideband direct up conversion transmitter designed in accordance with IEEE 802.15.4a standard. The transmitter operates in the higher UWB band in eight communication channels. It supports the burst position and the binary phase-shift keying modulation schemes and provides a modulated impulse sequence with a pulse repetition frequency up to 499.2 MHz. The transmitter is fabricated in a 0.25 μm BiCMOS technology and occupies a silicon area of 1.75×1.55 mm2.

An Ultra Low-Power 7 th order active-RC LPF for IEEE 802.15.4a standard compliant transceiver

This paper describes an ultra-low power differential 7th order active-RC low pass filter (LPF). The proposed filter is ready for the use in Impulse-Radio (IR) Ultra-Wideband (UWB) IEEE 802.15.4a standard compliant transceivers. The circuit is composed of three biquadratic and one first order filter sections. The structure of the operational amplifier (op amp) is adopted to ensure high linearity demands of the design. The evaluation of the LPF was done both for the stand alone version and with the cooperation of other transceiver components inside the IR UWB receiver and the transmitter test circuits. The designed LPF can handle the signals with the peak-to-peak amplitude of 680 mV, has corner frequency of 180 MHz and consumes 3.2 mA from 2.6 V supply. The circuit is fabricated in 0.25 µm SiGe:C BiCMOS technology of the IHP [1]. The chip size is 130×430 µm2.

An UWB receiver front-end for low data rate Wireless Personal Area Networks

This paper describes front-end components of the monolithic integrated impulse radio (IR) Ultra-wide band (UWB) receiver. The receiver is intended for the use in Low Data Rate (LDR) Wireless Personal Area Networks (WPAN) which is defined by the IEEE 802.15.4a standard. In order to assure compliance with the standard, receiver RF front-end components are designed towards higher degree of integration, low cost and low power consumption operation. The receiver operates in the higher UWB band and is able to cover channels from 5 to 9 of the IEEE 802.15.4a standard, which corresponds to the frequency range from 6 to 8.25 GHz. The circuit was fabricated in 0.25 µm SiGe:C BiCMOS technology.

ASIC Implementation of Highly Reliable IR-UWB Transceiver for Industrial Automation

Abstract An in-depth treatment of impulse an radio ultra-wideband (IR-UWB) wireless system is provided reviewing theoretical background, proceeding with detailed implementation procedure, and finally giving simulation and test results. This is the first research and prototyping work to be published in the field of IR-UWB that operates in the 6–8 GHz band. The aim of this work is to implement an IR-UWB wireless system for industrial automation that is robust and reliable. To achieve this, an analogue bandwidth of 250 MHz and digital baseband processing at the clock frequency 499.2 MHz were realized in a 250 nm BiCMOS process, integrating the complete system into a single chip. Simulation and measurement results confirm that the implemented IR-UWB transceiver is operational across four frequency channels in the band 6–8 GHz each supporting three data rates 850 kb/s, 6.81 Mb/s and 27.24 Mb/s.