presentation on mm waves

1. EVALUATING THEEVALUATING THE
EXPECTED COVERAGEEXPECTED COVERAGE
AND CAPACITY OF MMAND CAPACITY OF MM
WAVE SYSTEMWAVE SYSTEM

2. Group members
• Syed sajid ali
• Raza ullah
• Shoaib khan

3. INTRODUCTION
• Discovered by Dr Jagdish Chandra
Bose in 1900.
• Its range in electromagnetic spectrum
is from 30 to 300 Ghz.
• Its wavelength is from 10mm to 1mm.
• .

4. • Lies between microwaves and infrared.
• Promising technology for future cellular
systems.
• Can also be used in weapon system security
screening, medical Imaging and scanning
and Aerospace sector.

5. Our aim
• propose a new architecture for bridging
the
• existing gap in speeds between
wireless and optical links
• increase data rates by more than an
order of magnitude 10- 40 Gbps.

6. Problems which we are
dealing in our project
• Communication occur only in LOS.
• Mm waves are blocked by walls.
• Attenuated by fog, rain etc.
• Limited to few kilometer by high free space
loss and atmospheric absorption.

7. Our approach
• For solving above problems we are
using the following approach.
• MIMO
• Spatial multiplexing
• Adaptive Beam forming

8. MIMO

9. • In MIMO we use multiple antennas
simultaneously for transmission and
multiple antennas simultaneously for
reception.
• One primary reason to use multiple
antennas is to improve link quality and
reliability.

10. Spatial multiplexing
• Spatial multiplexing is a multiple
antenna technique that increases the
data rate as compared to single
antenna techniques.
• transmit independent and separately
encoded data signals, so-
called streams, from each of

11. the multiple transmit antennas.
• Space dimension is reused.
• Theoretically, spatial multiplexing can
increase the capacity of the system as
pairs of transmitter and receiver
antennas are added to the system.

12. Adoptive beamforming
• An adaptive beamformer is a system
which performs adaptive spatial signal
processing with an array of transmitters or
receivers.
• The signals are combined in a manner which
increases the signal strength to/from a
chosen direction.

13. • Signals to/from other directions are
combined in a benign or destructive
manner, resulting in degradation of the
signal to/from the undesired direction.