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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hofbauer, C. Huemer, M. Huber, J.B. |
| Copyright Year | 2010 |
| Description | Author affiliation: Klagenfurt University, Institute of Networked and Embedded Systems, Universitaetsstr. 65-67, 9020 Klagenfurt (Hofbauer, C.; Huemer, M.) || University of Erlangen-Nuremberg, Institute for Information Transmission, Cauerstr. 7, D-91058 Erlangen (Huber, J.B.) |
| Abstract | In this paper, we propose a novel transmit signal structure for OFDM (orthogonal frequency division multiplexing). Instead of the conventional cyclic prefix (CP), we use a deterministic sequence, which we call unique word (UW), as guard interval. We show how unique words, which are already well investigated for single carrier systems with frequency domain equalization (SC/FDE), can also be introduced in OFDM symbols. Since unique words represent known sequences, they can advantageously be used for synchronization and channel estimation purposes. Furthermore, the proposed approach introduces a complex number Reed-Solomon (RS-) code structure within the sequence of subcarriers. This either allows for algebraic RS decoding or for applying a highly efficient Wiener smoother succeeding a zero forcing stage at the receiver to further improve the bit error ratio behavior of the system. These beneficial properties are achieved while additionally featuring around the same bandwidth efficiency as conventional CP-OFDM. We present simulation results in an indoor multipath environment to highlight the advantageous properties of the proposed scheme. |
| Starting Page | 426 |
| Ending Page | 430 |
| File Size | 597373 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781424470044 |
| e-ISBN | 9781424470068 |
| DOI | 10.1109/ICCS.2010.5686520 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-11-17 |
| Publisher Place | Singapore |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | OFDM Decoding Receivers Frequency domain analysis Time domain analysis Noise Wireless LAN |
| Content Type | Text |
| Resource Type | Article |
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