Radio link performance of IEEE 802.11g wireless LAN in outdoor cellular networks | |
| Author | Nguyen Hua Duy Khang |
| Call Number | AIT Thesis no.TC-04-02 |
| Subject(s) | Wireless LANs Wireless communication systems Code division multiple access Cellular telephone systems IEEE 802.11g (Standard) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-04-02 |
| Abstract | The indoor wireless Local Area Network based on IEEE 802.lla/g standards provide significantly higher data rates up to 54 Mb/s but have a short-range coverage and low mobility. On the other hand, the wireless part of 4G cellular systems will become closer to a wireless LAN, but with wide area mobility management as in the 2G/3G cellular systems. In this thesis, the simulation model of IEEE 802.1 lg WLAN system with OFDM-CDMA combination in outdoor cellular networks has been developed and performance of the system is investigated in term of Bit Error Rate (BER) with different modulation schemes. BER performance of QPSK and 16QAM modulation schemes in IEEE 802.1 lg with OFDM-CDMA system under different channel conditions and with different number of CDMA users has been investigated and presented in this thesis. The turbo code is also considered in this thesis for coding channel in order to find a possible enhancement in the system performance. In general, a higher order modulation scheme can accommodate few number of CDMA users and more noise resilient lower order modulation scheme can support more number of CDMA users. Also the MAC throughput performance of the proposed system for outdoor WLAN has calculated in order to compare with the existing result of indoor WLAN based on IEEE 802.11 g. The throughput of the outdoor is better than those of the indoor. Based on these results, the coverage range of the outdoor WLAN has been calculated by Walfisch-Ikegami path loss model for outdoor microcell environment. In general, the maximum distance supported between transmitter and receiver depends on the modulation scheme. The coverage range of QPSK is larger than those of 16QAM modulation scheme but it provides lower data rate. With higher transmitter power, the system can accommodate more number of CDMA users. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-04-02 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Ahmed, Kazi M. ; |
| Examination Committee(s) | Erke, Tapio J. ;Teerapat Sa-nguankotchakorn; |
| Scholarship Donor(s) | Can Tho University, Vietnam; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2004 |