Tutor: | Dirk Wübben, Matthias Woltering |
Type of Thesis: | Master's thesis (MSc) |
date of end: | 02/2013 |
Student: | Yalei Ji |
Status: | finished |
ANT-shelfmark: | |
Abstract: |
The receiver at a
transmission scheme uses NACKs to request the retransmission of an
erroneous packet. For this, a big amount of packages will be
transmitted at very noisy channels. To overcome this
problem Hybrid ARQ (HARQ) are used in recent communication systems.
This schemes use additional Forward Error Correction (FEC). Thus. the
throughput get improved.
In this thesis a reliability-based criteria should be found. With this criteria a receiver should assess if a packet should be retransmitted or not. This should be done with the help of the bit error probability and the word error probability. Furthermore, an evaluation of different coding schemes with respect to Matlab simulations has to be performed. Additional the basics of HARQ strategies should be analyzed and evaluated. In comparison to the recent used strategy Incremental Redundancy (IR) and Chase Combining (CC) an extended multi-packet strategy should be analyzed. In order to process this thesis, the lecture Channel Coding I/II and basic knowledge in Matlab is essential. |