Projects per year
Abstract
In this paper we propose and analyze a method for downsampling discrete Fourier transform (DFT) precoded signals. Since the symbols (in frequency) are in the constellation set, which is a subset of the entire complex plane, it is possible to detect N symbols from the DFT precoded signal when transmitting M < N symbols, whereM is not too small. We build our analysis on socalled simple vectors, and show that it is possible to detect in the noiseless case with high probability down to approximately M ≥ N/4 for BPSK and M ≥ N/2 for QPSK. We develop extensions from the noiseless to the noisy case, and propose two different detectors for the AWGN channel. Simulations show that using the two proposed detectors in the AWGN channel, we observe empirically a phase transition at M ≈ N/2 for QPSK. Further, it is shown how downsampled QPSK signals can achieve the same BER and data rate as 8PSK at a lower signaltonoiseratio per information bit.
Original language  English 

Title of host publication  Proceedings of the 12th IEEE International Symposium on Signal Processing and Information Technology 
Number of pages  6 
Publisher  IEEE 
Publication date  2012 
Pages  141146 
ISBN (Print)  9781467356046 
DOIs  
Publication status  Published  2012 
Event  IEEE International Symposium on Signal Processing and Information Technology  Ho Chi Minh City, Viet Nam Duration: 12 Dec 2012 → 15 Dec 2012 
Conference
Conference  IEEE International Symposium on Signal Processing and Information Technology 

Country/Territory  Viet Nam 
City  Ho Chi Minh City 
Period  12/12/2012 → 15/12/2012 
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Dive into the research topics of 'Downsampling of DFT Precoded Signals for the AWGN Channel'. Together they form a unique fingerprint.Projects
 2 Finished

PhD project: Compressive Sensing in Communication Systems
Fyhn, K., Larsen, T. & Jensen, S. H.
01/08/2010 → 31/07/2013
Project: Research

SparSig: Sparse Signal Processing in Wireless Communications
Larsen, T., Jensen, S. H., Arildsen, T., Fyhn, K., Pankiewicz, P. J., Li, P. & Jensen, T.
01/01/2010 → 27/09/2013
Project: Research