Computer Science – Information Theory
Scientific paper
2010-01-08
Computer Science
Information Theory
5 pages, 6 figures, submitted to ISIT2010
Scientific paper
In this paper we propose a novel transmit signal structure and an adjusted and optimized receiver for OFDM (orthogonal frequency division multiplexing). Instead of the conventional cyclic prefix 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 allows for RS-decoding or to apply a highly efficient Wiener smoother succeeding a zero forcing stage at the receiver. We present simulation results in an indoor multipath environment to highlight the advantageous properties of the proposed scheme.
Hofbauer Christian
Huber Johannes B.
Huemer Mario
No associations
LandOfFree
Coded OFDM by Unique Word Prefix does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Coded OFDM by Unique Word Prefix, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coded OFDM by Unique Word Prefix will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-502763