IME UWB Pulse Based Test-Beds for Communication and Radar Thomas Buchegger Linz Center of Mechatronics - ICIE Alexander Reisenzahn University of Linz – IME

UWB Pulse Based Test-Beds for Communication and Radar IME 2 Outline UWB Communication Test-Beds –Human Tissue Penetrating Radio Link Prototype Cochlear Implant Application –PPM Test-Bed with Synchronization –Phase Modulated Transmitted Reference Systems UWB Radar

UWB Pulse Based Test-Beds for Communication and Radar IME 3 Communication Test-Beds

UWB Pulse Based Test-Beds for Communication and Radar IME 4 Human Tissue Penetrating Radio Link Prototype Modulation: On-Off Keying PRF: 40 MHz Data rate: 1.2 Mbps Range: 1 m Receiver: non-coherent detector Power consumption (Rx): 20 mW Rx with Backward Diode: 0 mW UWB transmitter UWB detector receiver

UWB Pulse Based Test-Beds for Communication and Radar IME 5 Human Tissue Penetrating Radio Link Prototype – The Chochlear Implant Application outside componts of a chochlea implant high power consumption optical unfavorable UWB transmit signal

UWB Pulse Based Test-Beds for Communication and Radar IME 6 UWB PPM Test-Bed with Synchronization receiver local oscillator channeltransmitter UWB transmitter external clock (Information) radio channel PD LN A PD LP OP A ADC micro controller DDS UWB reference pulse oscilloscop block schematic of the prototype

UWB Pulse Based Test-Beds for Communication and Radar IME 7 UWB PPM Test-Bed with Synchronization Results: UWB PPM transmitter step recovery diodes data rate of 10Mbps UWB PPM coherent receiver correlation Receiver DDS for synchronization Synchronization algorithm: clock synchronization < 100 ppm data synchronization < 5 ms UWB PPM and OOK test bed

UWB Pulse Based Test-Beds for Communication and Radar IME 8 Pulse-Based Modulation Schemes

UWB Pulse Based Test-Beds for Communication and Radar IME 9 PMTR UWB Systems Fast and easy synchronization with an integrating controller Only one broadband mixer in the receiver One pulse per bit

UWB Pulse Based Test-Beds for Communication and Radar IME 10 EPMTR Transmitter and Receiver

UWB Pulse Based Test-Beds for Communication and Radar IME 11 Simulation – DHTR, PMTR, EPMTR Systems Comparison in AWGN channel DHTR in CM1 with 10 Mbps PMTR in CM1 with 10 Mbps

UWB Pulse Based Test-Beds for Communication and Radar IME 12 PMTR - Hardware – Test-Bed PMTR transmitter Pulse generator of an UWB PMTR system Transmit pulses of a PMTR system

UWB Pulse Based Test-Beds for Communication and Radar IME 13 Radar Test-Bed

UWB Pulse Based Test-Beds for Communication and Radar IME 14 UWB-Radar Test-Bed Principle Radar test-bed block diagram

UWB Pulse Based Test-Beds for Communication and Radar IME 15 Transmitter – Pulse generation with D-Latch and single bipolar transistor TTL-outputsignal drives transistor into saturation Due to the step recovery effect a steep rising edge at the collector is generated Differentiation with a short circuited stub Elimination of the negative components with a clipping diode Pulse generation circuitry

UWB Pulse Based Test-Beds for Communication and Radar IME 16 Transmitter – Pulse generation with D-Latch and single bipolar transistor Output pulse Spectrum of the output pulse combined with the FCC indoor radiation mask

UWB Pulse Based Test-Beds for Communication and Radar IME 17 Receiver – Sequential Sampling

UWB Pulse Based Test-Beds for Communication and Radar IME 18 Receiver - Sampling Phase Detector Step recovery diode generates step functions Capacitors differentiate the steps to pulses and act as a filter for low frequencies Schottky diodes are turned on by the pulses

UWB Pulse Based Test-Beds for Communication and Radar IME 19 Receiver – Down Conversion Pulse original Pulse downconverted

UWB Pulse Based Test-Beds for Communication and Radar IME 20 Measurements Conversion gain1-dB compression point

UWB Pulse Based Test-Beds for Communication and Radar IME 21 Measurements Propagation delay 1 dB-Compression Dynamic Range: > 42 dB Receiver Sensitivity: -43 dBm

UWB Pulse Based Test-Beds for Communication and Radar IME 22 UWB Radar Test-Bed No biasing Low cost off the shelf components FR4 PCB-material Single 5 V power supply Data transfer with USB- interface Radar test-bed

UWB Pulse Based Test-Beds for Communication and Radar IME 23

UWB Pulse Based Test-Beds for Communication and Radar IME 24 Receiver – Downconverter with SPD Down converter circuitry with SPD

UWB Pulse Based Test-Beds for Communication and Radar IME 25 Receiver – Downconverter Bandwidth Bandwith is depending on the sampling pulse duration: Pulse duration approximately the transit time of the SRD

UWB Pulse Based Test-Beds for Communication and Radar IME 26 Transmitter - Pulse Generation D-Latch combined with step recovery diodes (SRD) D-Latch combined with a single bipolar transistor

UWB Pulse Based Test-Beds for Communication and Radar IME 27 Transmitter - D-Latch with SRD C1C1 C2C2 C3C3 +5V L1L1 D2D2 D1D1 I1I1 I2I2 inout GND Both SRDs biased in forward direction D 1 used for steepening the rising edge D 2 used for steepening the falling edge Capacitors for DC-decoupling

UWB Pulse Based Test-Beds for Communication and Radar IME 28 Transmitter - D-Latch with SRD TTL Pulse UWB Pulse Input- and Output-Pulse Prototype

UWB Pulse Based Test-Beds for Communication and Radar IME 29 UWB PPM Test-Bed with Synchronization f PRF = 10 MHz t MC = 750 ns t POS = 38 ps  f = 507 Hz pulse repetition time necessary new pulse repetition time for a pulse shift of t POS is used within the time t MC. example: Template Signal Rx Signal

UWB Pulse Based Test-Beds for Communication and Radar IME 30 EPMTR Transmitter and Receiver