Ultra Wideband IEEE 802.15.4a

Channel Model and Simulati on

Mohammad Alkhodary 200806080Ali Al Saihati 200350130

EE 578 Simulation Communication SystemsCase Study (101) Phase II

KFUPM

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n 1/22

Introduction Overview of the Considered Environment Generic Channel Model Channel parameters Environment Parameterization and channel

impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Outlines

2/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

In UWB we have to control the output power perfectly in order to avoid the interference with other systems

The channel effects play an important factor in UWB signal detection, due to power limitation and sever multipath effects.

We have to consider any obstacle or channel effects, distinguish between narrow and broad environments and line of Sight and Non Line of Sight propagation.

It’s an important to know the profile of the channel and statistical model of paths arrival time to be used in Rake receiver.

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Introduction

3/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

1) Indoor residential2) Indoor office3) Industrial environments: are characterized by larger enclosures (factory halls),

filled with a large number of metallic reflectors. This is anticipated to lead to severe multipath.

4) Body-area network (BAN): communication between devices located on the body, e.g., for medical sensor communications, "wearable" cellphones, etc. Due to the fact that the main scatterers is in the near field of the antenna, and the generally short distances, the channel model can be anticipated to be quite different from the other environments.

5) Outdoor: suburban-like microcell scenario, with a rather small range.6) Agricultural areas/farms: for those areas, few propagation obstacles (silos,

animal pens), with large dististances in between are present. Delay spread can thus be anticipated to be smaller than in other environments

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Overview of the Considered Environment

4/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

Pathloss

Shadowing

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Generic Channel Model

5/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

Power Delay Characteristics According to a very short pulse therefore multipath components arrive in Poisson distributed clusters. Furthermore, within each cluster, the path arrivals are also describedby a Poisson process. Both cluster interarrival times and path interarrival times, are thus exponentially distributed with model parameters that are experimentally determined

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Generic Channel Model

6/22

ReflectionClusters of large shifted pulses

ScatteringClusters of

overlapping pulses

Diffraction Clusters of

small shifted pulses

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

Power Delay Profile

is the number of propagation path. is the tap weight of the component in the cluster, is the delay of the cluster, is the delay of the MPC relative to the cluster arrival time . The phases are uniformly distributed from the range

The number of clusters is assumed to be Poisson-distributed

The distributions of the cluster arrival times are given by a Poisson processesis the cluster arrival rate.

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Generic Channel Model

7/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Channel Parameters

8/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Residential environments Parameters

9/22

valid up to 20 m

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Residential LOS Channel Response

10/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Residential NLOS Channel Response

11/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Indoor offi ce environment Parameters

12/22

valid for 2-28m

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Indoor offi ce LOS Channel Response

13/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Indoor offi ce NLOS Channel Response

14/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Outdoor environment Parameters

15/22

Covered area 2-8m

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Outdoor LOS Channel Response

16/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse responseReferences

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Outdoor NLOS Channel Response

17/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse responseReferences

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Industrial environment Parameters

18/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Industrial LOS Channel Response

19/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

Industrial NLOS Channel Response

20/22

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

U l t ra W i d e b a n d C h a n n e l M o d e l a n d S i m u l ati o n

References

21/22

Andreas F. Molisch, Kannan Balakrishnan, Chia-Chin Chong, “IEEE 802.15.4a channel model - final report.

Alexander M. Haimovich, Jason A. Dabin, “THE EFFECTS OF ANTENNA DIRECTIVITY ON PATH LOSS AND MULTIPATH PROPAGATION IN UWB INDOOR WIRELESS CHANNELS” IEEE signal process journal

Jose L. Paredes, Gonzalo R. Arce, “Ultra-Wideband Channel Estimation” , IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, VOL. 1, NO. 3, OCTOBER 2007

Outlines Introduction

Overview of the Considered Environment Generic Channel Model

Channel parameters Parameterization and channel impulse response References

Thank You

22/22