High Altitude Aeronautical Platform Stations (HAAPS) is the name of a technology for providing wireless narrowband and broadband telecommunication services as well as broadcasting services with either airships or aircrafts. The HAAPS are operating at altitudes between 3 to 22 km.

1. SHAIK NAFFESHA
Reg No: 16IS1D9712
HIGH ALTITUDE
AERONAUTICAL PLATFORMS
(HAAPS)TECHNOLOGY

2. Contents
 What is HAAPS ?
 Why HAAPS ?
 Main Objective
 HAAPSArchitecture
 Power Requirements
 HAAPS Projects
 Applications
 Conclusion

3. What is HAAPS ?
 High Altitude Aeronautical Platform Stations (HAAPS) is the name of a
technology for providing wireless narrowband and broadband
telecommunication services as well as broadcasting services .
 The HAAPS are operating at altitudes between 17 to 22 kms range in
stratospheric layer of the atmosphere.
 HAAPS are able to cover over 100 kms diameter ,depending on the minimum
elevation angle accepted from user’s location.
 The platforms may be aircrafts or airships(essentially balloons) and may be
manned or un-manned with autonomous operation coupled with remote control
from the ground.

5. Why HAAPS ?
 It combines most of the advantages of both satellite
and terrestrial systems while avoiding many of the
pitfalls.
 Traffic can be linked and switched among multiple
HAAPS, Satellites and Terrestrial gateways.

6. Main Objective
 Provision of the bandwidth that can support services like
multimedia applications (telephony,TV,High speeed internet
etc.,..)
 Ability to operate in a high frequency band on the radio
spectrum.
 Provision of increased capacity for terrestrial
telecommunication networks ,either by supporting more
users/cells without degrading performance or by providing
greater bandwidth.

7. HAPs can be divided into four categories (as shown in Figure 1.1):
1. Manned plane, e.g. Grob G520 Egrett
2. Unmanned plane (fuel), e.g. AV Global Observer
3.Unmanned plane (solar), e.g. AV/NASA Pathfinder
Plus
4. Unmanned airship (solar), e.g. Lockheed Martin HAA

10. HAAPS’Architecture

11. On Board Equipment

12. Ground Installations

13. Power Requirements
 Solar powered aircraft must be capable of continuous flight.
Energy must be collected and stored at day to both power
the aircraft and enable to fly throughout the night.
 The air craft power system consists of photovoltaic cells
and a regenerative fuel cell.
 The main advantage of this method is that it eliminates the
need to carry fuel and to extract and compress air at
altitude.

14. Transmission and Coding Techniques
 WRC-97 had announced frequency bands for HAAPS in
around 47 GHz(downlink : 47.2 -47.5 GHz and uplink :
47.9-48.2 GHz).
 A very good approach is the use of adaptive coding and
modulation based on channel condition schemes.
 Three modulation schemes were examined for low, medium
and high data rate applications as GMSK,16-QAM and
rounded 64-QAM respectively.

15. Various HAAPS Projects
HAAPS have been proposed using both airship and aircraft technology.
1.Airship Technology
i.
ii.
iii.
Sky station
Sratsat
Stratospheric Platform system fromJapan
2.Aircraft Technology
i.
ii.
iii.
Halo-proteus
Sky tower
Heliplat

16. Sky station
 Sky station is the name of an airship system
planned by the US company “Sky Station
International”.
 Data rates for fixed services are 2 Mbps for
uplink and 10 Mbps for downlink.
 Data rates for mobile services are 9.6 -16
Kbps for voice and 384 Kbps for data.
 Cost of the project for a worldwide
infrastructure is estimated as $2.5 billion.

17. StratSat
 Startsat is an airship system planned by the UK
based company “Advanced Technology Group”
for both civilian and military applications.

18. Stratospheric Platform System from
Japan
 It is planned by the Wireless Innovation Systems Group of the
Yokosuka Radio Communications Research Center in Japan .

19. Halo-Proteus

20. Sky Tower Heliplat

21. Advantages
 HAAPS don’t require any launch vehicle.
 Once a platform is in position ,it can immediately begin delivering
service to its area without any global infrastructure.
 Provides a higher frequency reuse and thus higher capacity than
satellite systems.
 Each platform can be retrieved , updated and relaunched without
service interruption.
 They are powered by solar technology and non-polluting fuel cells.

22. HAAPS Issues
 Light weight.
 Safety.
 Cost.

23. Conclusion
 HAPS will be deployed together with terrestrial and satellites
elements to provide another degree of flexibility for system
deployment that can be easily adjusted to the needs of the network
operators and users’ traffic demands
 HAPS will play a complementary role in future mobile system
infrastructure e.g. consisting of W-LAN, cellular, and satellite
mobile systems to ease the deployment and roll out of the 3G and
beyond 3G services

24. REFERENCES
G. Djuknic, J. Freidenfelds, et al., "Establishing Wireless
Communications Services via High-Altitude Aeronautical
Platforms: A Concept Whose Time Has Come?" IEEE
Communications Magazine, September 1997
J. Martin and N. Colella, "Broadband Wireless Services from
High Altitude Long Operation (HALO) Aircraft," SPIE Int'l.
Symp. Voice, Video, and Data Commun.: Broadband Eng. for
Multimedia Markets, Dallas, TX, Nov. 1997
N. Colella and J. Martin, "The Cone of Commerce," SPIE
Int'l. Symp. Voice, Video, and Data Commun.: Broadband Eng.
for Multimedia Markets, Dallas, TX, Nov. 1997

25. THANK YOU