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Presentation transcript:

IHP Im Technologiepark Frankfurt (Oder) Germany IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved UWB simulation chain and its performance Olonbayar, Sonom

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Outline UWB simulation chain Analog Front End- Pulse generation, modulation and demodulation Channel models IEEE a Baseband signal procesing Channel coding Simulation results Coded and uncoded UWB with detection Conclusion

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Advantages of UWB Consumption of low power makes it suitable for TANDEM Large bandwidth and high data rate Very short pulses and low duty cycle

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Spectrum occupancy of UWB systems Frequency (GHz) Radiated Power (dBm/MHz) Low Band ( GHz) High Band (6-10GHz) Huge spectrum is available which can ce radiated with very low power

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Structure of the considered UWB simulation chain Data Pulse generator Modulator ….. Gaussian shaped pulses Channel model T r a n s m i t t e r AWGN Demodulator BER performance R e c e i v e r a C h a n n e l

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Pulse generation Gaussian shaped pulses: T Number of samples

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Setting parameters Data rate - Variable Duty cycle=Data rate * Pulse duration Number of samples per period pulse duration Pulse period Sampling frequency T

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Modulation OOK (On Off Keying) PPM (Pulse Position Modulation) OOK modulator …… PPM modulator ……..

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Modulation BPSK (Binary Pulse Shift Keying) BPSK modulator 01100……

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Demodulation Coherent phase information and channel estimation are needed complicated but provides better performance, Example: matched filter receiver Noncoherent no phase information is necessary, simple but degraded performance

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Channel model Impulse response of the Saleh-Valenzuela model tap weight of the k-th component of the l-th cluster Delay of the l-th cluster time Path magnitude T Cluster 0 Two Poisson model: First path of each cluster Paths within each cluster

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Channel model for different scenario Residential LOS Residential NLOS Office LOS Office NLOS Outdoor LOS Outdoor NLOS Industrial LOS Industrial NLOS time Path magnitude T Cluster 0

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Channel model Parameters Residential LOSNLOS Power delay profile , 0.15, , 0.15, Small scale fading Parameters Outdoor LOSNLOS Power delay profile , 2.41, , 1.13, Small scale fading

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Performance of UWB communication systems BER performance of UWB wih PPM modulation 9 dB BER performance of UWB wih OOK modulation 8 dB Outdoor NLOS scenario, data rate=1Mbps

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Performance of UWB with different modulation BER performance of UWB for different modulation schemes with coherent detection, data rate = 1Mbps 3dB 2dB

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved UWB Baseband signal processing Analog Front End Reed Solomon Encoder Systematic Convolutinal Encoder Systematic Convolutinal Decoder Reed Solomon Decoder Analog Front End Data Baseband signal processing

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Convolutional coded UWB Convol. encoder Rate 1/2 Binary Data [171,137] generator polynom Constraint length K=7 Viterbi decoder with hard output Binary Data Transmitter Receiver

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Performance of coded UWB communication system Performance of convolutionally coded UWB with PPM 2.5 dB

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Conclusion UWB simulation chain is developed and tested Various modulation and detection techniques are discussed Channel models applicable to sensor networks are presented UWB BPSK offers improved BER performance over PPM and OOK The coding performed in baseband yields around 2 dB improvement in BER

IHP Im Technologiepark Frankfurt (Oder) Germany © All rights reserved Thank you for your kind attention