Abstract
In this paper, prefiltering techniques for Sphere Detection (SD) in frequency-selective channels are examined. It is shown that a link between QL-factorization of the channel matrix and minimum-phase prefiltering exists. As a result, it ispossible to regard SD as a generalization of traditional reducedstate sequence estimation, providing a unifying framework for the two detection methods. It is illustrated how minimum-phase prefiltering or the Linear Minimum Mean-Square Error Decision Feedback Equalization (LMMSE-DFE) forward filter is capable of reducing the complexity of sphere detectors significantly, while still obtaining near-optimal performance. The significant reduction in complexity is obtained as prefiltering enables earlier decision making in SD. Simulations carried out in an EDGE system confirm that prefiltering leads to a considerable complexity reduction for sphere detectors.
Original language | English |
---|---|
Title of host publication | Global Telecommunications Conference, GLOBECOM '07. IEEE, 26-30 Nov. 2007 |
Publisher | IEEE |
Publication date | 2007 |
Pages | 4237-4241 |
ISBN (Print) | 978-1-4244-1043-9 |
DOIs | |
Publication status | Published - 2007 |
Event | 2007 IEEE Global Telecommunications Conference - Washington, United States Duration: 25 Nov 2007 → 30 Nov 2007 Conference number: 50 https://ieeexplore.ieee.org/xpl/conhome/4410909/proceeding |
Conference
Conference | 2007 IEEE Global Telecommunications Conference |
---|---|
Number | 50 |
Country/Territory | United States |
City | Washington |
Period | 25/11/2007 → 30/11/2007 |
Internet address |