Computer Science – Information Theory
Scientific paper
2006-11-30
Computer Science
Information Theory
minor revisions, accepted for IEEE Trans. Commun.
Scientific paper
The peak-to-mean envelope power ratio (PMEPR) of a code employed in orthogonal frequency-division multiplexing (OFDM) systems can be reduced by permuting its coordinates and by rotating each coordinate by a fixed phase shift. Motivated by some previous designs of phase shifts using suboptimal methods, the following question is considered in this paper. For a given binary code, how much PMEPR reduction can be achieved when the phase shifts are taken from a 2^h-ary phase-shift keying (2^h-PSK) constellation? A lower bound on the achievable PMEPR is established, which is related to the covering radius of the binary code. Generally speaking, the achievable region of the PMEPR shrinks as the covering radius of the binary code decreases. The bound is then applied to some well understood codes, including nonredundant BPSK signaling, BCH codes and their duals, Reed-Muller codes, and convolutional codes. It is demonstrated that most (presumably not optimal) phase-shift designs from the literature attain or approach our bound.
No associations
LandOfFree
On the Peak-to-Mean Envelope Power Ratio of Phase-Shifted Binary Codes 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 On the Peak-to-Mean Envelope Power Ratio of Phase-Shifted Binary Codes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Peak-to-Mean Envelope Power Ratio of Phase-Shifted Binary Codes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-422711