Hadi's Research Interest

Finally I made my decision up

2005-11-11T07:26:00.000-08:00

I am not a fast decision maker

After suffer in deep thinking I come to the final decision about my MSc' project. The project topic is "Multiuser Detection in Sattelite CDMA System".

The topic integrates a well known CDMA concept with the Mobile Satellite Communication. I like CDMA since nowadays some achievement in 3G Systems was made by CDMA, either CDMA2000 (3GPP2) or W-CDMA (3GPP). Both families have their own evolution paths that rely on CDMA concept or mix between CDMA and other recent multiple access techniques (TDMA, FDMA, OFDM, and so fort).

Eventhough Mobile Satellite System haven't had such a success commercial story as the terrestrial systems, there are a lot of work undergone in University of Surrey and other researh centers to make some breakthrough both in multiple access and the satellite technology itself. Several researches undergoes to examine whether OFDM, UMTS or CDMA2000 can be used and examined its individual performance under typical satellite characteristic and constellation (LEO, VLEO, etc). On the other hand, there are some intension from the research center to build a palm sattelite (from a mug size to slighly bigger than a PC) with the same performance and more cost effective. As a result, the mobile satellite still has a hope to become an important solution to the mobile personal communication system in near future.

It's obvious that I will have a chance in mastering my CDMA concept and also the mobile sattelite concept after finishing this project. I hope I can make it. May Allah bless and help me.

Thanks to Brother Atta Quddus and Prof Barry Evans who will supervise me to do this project.

this is the way how I decide

2005-11-10T22:59:00.000-08:00

Project I : Multidescriptive coding
Supervisor; Prof Ahmed Kondoz (Head of Multimedia & Signalling Research Group, Univ of Surrey) and Dr. Villette (Research Fellow who introduce a new low bit rate audio codec, SB-LPC)

Advantages:
• Tahu tttg TCP/IP
• Tahu ttg paketisasi multimedia
• Tahu tentang Audio Coding
• Programming C
• Overall direction provided
• Mudah dapat promosi PhD (kalau berhasil)

Disadvantages (level of uncertainity) :
• Beliau sangat sibuk,
• Saya nggak begitu kenal dengan Dr. Vilette, how helpful he is ?
• Aplikasi di lapangan (career) tidak significant..
• Sudah terlalu banyak yang tahu TCP/IP dan Audio Coding
• Uncertainity lumayan gede (untuk berhasil dalam project, it is certainly a first class project)
• Saya harus mandiri banget.. nggak tahu siapa yang bias Bantu..? terutama aspek networking (flow control, Real time protocol, network simulator, etc)
• Tidak adanya komponen wireless.. kalaupun ada… saya harus melewati batu sandungan yang lumayan… I have to finish MDC first and than another challenging project will come (since it includes not only packet loss but also channel lost)

Project II: Multiuser Detection in Satellite CDMA System
Supervisors: Profesor Barry Evans (Director of CCSR Univ of Surrey) and Atta Quddus (PhD student who makes a WCDMA networ planning and used by 3G Hutchitson UK)
Kelebihan :
• Bisa mendalami CDMA
• Bisa mendalami Mobile Satellite
• Atta Quddus.. helpful (muslim) dan punya akses ke Barry Evans dan Prof Tafazolli… meskipun nggak terlalu powerful
• Bisa diskusi dengan Ferry Wathan soal CDMA
• Dan dengan Anggoro maupun Pak Eddy Setiawan soal Mobile Satellite
• Ada kawan untuk nanya (karena ada yang mendalami CDMA juga)
• Lebih PD untuk nyelesaikannya…. Tinggal banyak baca dan programming MathLab
• Aplikasi CDMA di karir sangat luas (jadi kalau nggak dapat PhD, bias lebih PD berkarir di dunia Wireless (TELKOM Lab wireless-flexi, TELKOMSEL)
• Nyambung ama MSc Pathway saya…
• Dapat tambahan ilmu Satelite dari Surrey yang emang jagonya di Satellite
• Saya suka proyek ini.. :D

Disadvantages
• Jalan ke PhD masih sangat panjang  (harus distinction, dulu)
• Kompleksitas CDMA dan Satellite… cukup tinggi  bisa dipelajari

Research Background

2005-11-07T22:36:00.000-08:00

I have been working more than 7 years in TELKOM R&D Center (TELKOMRisTI).
After finishing my bachelor final project in Expert System and Hypermedia (February 1996) I start to enter new research experience in following areas
- Intelligent Network (Bell Laboratories Lucent Technologies and TELKOMRisTI)
- Wireless Intelligent Network (Wireless Laboratory-TELKOMRisTI, Samsung-HP OpenView)
- CDMA2000 Terminal Standardization (Wireless Laboratory-TELKOMRisTI, CDG-GHRC, CDMA Certification Forum)
- CDMA2000 Core Network standardization (Wireless Laboratory-TELKOMRisTI)

While I am in the university of Surrey, I am still thinking the appropriate researh pathway I should carry on from now and forward. It needs extra though before deciding, somehow make me suffer into deep contemplation. I haven't decided which areas I can carry on the projects. There are many things to consider and unfortunately most of them are beyond my control.

- Mobile Multimedia, including multimedia source coding and transmission over Wireless IP Network.
- Mobile Ad hoc Network (MANET)
- CDMA2000 or WCDMA physical layers
- MiMo, OFDM, or UWB...

It would be excellent if I can work on CDMA2000. But it is beyond my control, I expect to get approval from Dr. Atta Quddus and Prof Barry Evans.
MiMo, OFDM, UWB are interesting topics. However it needs an advance understanding to cope with their complexity either in mathematics, modulation technique and MathLab programming. Nevertheless, one's cann't escape from programming works.

MANET and Multimedia will be next areas I should think about for next couples of days.