Slide 1Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Impact of Ultra Wide-Band Antennas onCommunications in a Spatial Channel

Impact of Ultra Wide-Band Antennas onCommunications in a Spatial Channel

Mohamed El-Hadidy & Thomas Kaiser

University of Duisburg-Essen

Faculty of Engineering, Department of Communication Systems,

Bismarckstr. 81, 47057 Duisburg, Germany

Email: el-hadidy@nts.uni-due.de

Slide 2Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

• Mathematical frame of UWB system model

• How the whole chain of the UWB transmisson

modeled, including the antennas‘ effects?

• Omni-directional or Directionl antennas?

• Impact of antennas on the spatial channel and

some simulation results.

• Future work

Outline

Slide 3Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

UWB System Model

Slide 4Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

UWB System Model

Slide 5Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

UWB System Model

Slide 6Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

UWB System Model

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

Complete UWB Chain

Tx Rx

Ant_Tx Ant_RxChannel

IEEE Ray Tracing

Directional Omni-Directional

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

Complete UWB Chain

Tx Rx

Ant_Tx Ant_RxChannel

* *

Slide 9Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

FirstChannel Impulse Response

of the Environment

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

IEEE Channel Model

Slide 11Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Ray-tracing Channel Model

x10-7

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

Discrete Channel Impulse Response

Slide 13Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

SecondAntenna Impulse Response

&

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Radiation Pattern of Horn Antenna

Freq = 6.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 3 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 3.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 4 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 4.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 5.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 6 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 6.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 7 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 7.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 8 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 8.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 9 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 9.5 GHz

Mohamed El-Hadidy and Thomas Kaiser University of Duisburg-Essen

Crowncom, Juni 10, 2006

HFSS Gain in dB from Radiation Pattern

Freq = 10 GHz

Slide 30Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Bowtie Antenna

Antenna radiation pattern

Slide 31Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Step Response of Bowtie Antenna

Slide 32Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Overall Channel Impulse Response

DirectionalIdeal Omni-Directional

Rotating Tx by 90°

Rotating Tx & Rx by 90°

Slide 33Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Rotation of Tx Antennas in SISO System

Slide 34Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Omni-Directional vs. Directional Antennas in SISO & MISO

Slide 35Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006

Future Work

• Investigating the diversity added to the UWB MIMO system using the antennas’ impact (e.g. using different types of antennas, rotating the antennas, etc.)

• Investigating the coupling effect appearing among the neighbouring antennas either at transmit or receive sides for UWB MIMO system.

• Embedding the whole antenna properties which is angular and frequency dependent into the system like polarization and input impedance, etc.

Slide 36Mohamed El-Hadidy and Thomas Kaiser

University of Duisburg-EssenCrowncom, Juni 10, 2006