|
|
Line 1: |
Line 1: |
− | [[File:ChannelShortening.png|thumb|A channel shortening prefilter concentrates the energy of the Channel Impulse Response (CIR) towards the first few taps.]] | + | #REDIRECT [[VLSI Implementation of a Channel Shortener]] |
− | ==Short Description==
| |
− | In a wireless system with a multi-tap Channel Impulse Response (CIR) the receiver is confronted with a computationally challenging issue: Inter Symbol Interference (ISI) and Viterbi equalization. In particular as modern cellular standards tend to use ever higher modulation orders (up to 32-QAM) for Evolved EDGE, the equalizer becomes ever more complex. There exist various approaches to mitigate the induced ISI by a multi-tap CIR. The approach presented in [1] uses a channel shortening prefilter before equalization. Thus, ISI is mitigated to a large extent and the Viterbi equalizer's complexity is reduced. Said channel shortening prefilter has been thoroughly analyzed at the institute and a fix-point model has been built in MATLAB. In this project, the students ought to understand the channel shortening prefilter from [1] and implement it on an ASIC. The goal is to have an ultra-low power channel shortening prefilter.
| |
− | | |
− | ===Status: Available ===
| |
− | : Looking for 1-2 Semester students
| |
− | : Contact: [[User:Weberbe|Benjamin Weber]]
| |
− | | |
− | ===Prerequisites===
| |
− | : VLSI I
| |
− | : MATLAB
| |
− | | |
− | ===Character===
| |
− | : 20% Theory/Simulation
| |
− | : 50% VHDL
| |
− | : 30% ASIC Implementation
| |
− | | |
− | ===Professor===
| |
− | : [http://www.iis.ee.ethz.ch/portrait/staff/huang.en.html Qiuting Huang]
| |
− | ==References==
| |
− | [1] Fredrik Rusek, Adnan Prlja. Optimal Channel Shortening for MIMO and ISI Channels. In ''Wireless Communications, IEEE Transactions on'', vol. 11, no. 2, pages 810–818, 2012.
| |
− | <!--
| |
− | [2] Harald Kröll, Stefan Zwicky, Thomas Willi, Andreas Burg, Qiuting Huang. Optimal Channel Shortening and Equalization based on Information Rate Maximization for Enhanced 2G Networks. In ''TBD'', pages TBD, TBD.
| |
− | --->
| |
− | [[Category:Digital]]
| |
− | [[Category:Available]]
| |
− | [[Category:Semester Thesis]]
| |
− | [[Category:Weberbe]]
| |
− | [[Category:ASIC]]
| |
− | [[Category:Telecommunications]]
| |