Simple Antenna Diversity with inherit directional information for SDMA

operation

Project group 997:Julien GonidecThibaut IngrainFrançois NetMauro PelosiAurélie Villemont

Supervisors: Patrick Eggers

Chenguang Lu

Censor: Jesper Ø. Nielsen

Jitter diversity simulation in a simplified environment

Steps of the simulation

Modelling a simplified indoor channel Generation of an ideal antenna pattern Jitter process description Results and tendencies

Monte-Carlo simulations

the user’s location is randomly defined at each step

Environment implementation (1)

Clustered scattering Investigations concentrated on rays from an unique cluster AOA power distribution approximated by a Laplacian

distribution PowerLaplace_a(θAOA)

Environment response

Where The amplitude is defined by

The phase is defined by

,, , . er AOAj xAOA er AOAer x x e

_

1

., . 1 ,

1 ,R

R Laplace a AOAk

er i AOAk i AOAkN

n AOAkn

N Px temp x

temp x

, 2 . 2 ,er AOA AOAx temp x

Environment implementation (2)

“a“ parameter controls the shape of the environment

10-6 < a < 10-1

BWenv: half-power width of the mean environment response

Simulation of various type of environment by varying the a parameter

Antenna pattern

Choice of an ideal beam pattern (no side and back lobes)

Amplitude of the pattern

“α“ parameter controls the antenna beamwidth

sin,

0AOA BO AOA BO

AOA BO

ifa

otherwise

Transfer function

At each realisation all beam’s orientation are performed

Discrete transfer function

Influence of the environment width on the fades

1

, , . ,AOAN

BO AOAn AOAn BOn

h x er x a

Jitter process

We want to compare 3 different algorithms: JRDA (Jitter with respect to the Reference Direction Algorithm) BPP (best possible process algorithm) FB (fixed beam algorithm) as a reference

Explanation of the JRDA process

1. Reference direction θrefk is found at the kth step

2. is compared to and

3. The orientation of the maximum value is chosen θpathk

4. is the whole the collected h module

,k refkh x ,k refk jitth x

,k refk jitth x

, pathh x