Download Full Text (220 KB)
Dr. Todor Cooklev
Department of Engineering
Indiana University – Purdue University Fort Wayne
Orthogonal Frequency Division Multiplexing (OFDM) techniques use a guard interval (GI) between symbols to eliminate the inter-symbol interference (ISI). Zero padding (ZP) a known GI technique, resulting in ZP-OFDM. ZP-OFDM can guarantee symbol recovery regardless of the presence of channel spectral nulls, but then it suffers from a complexity problem. There are low-complexity receivers, but their performance is inferior. This paper introduces two improved receiver designs for ZP-OFDM, which make the channel matrix ω-circulant. These receiver designs require one-dimensional optimization at the receiver. Due to the complexity is slightly increased, but remains comparable with known low-complexity receivers. The proposed receivers perform better than other ZP-OFDM receivers.
Darabi, James, "Optimized Orthogonal Frequency-Division Multiplexing (OFDM)" (2013). 2013 IPFW Student Research and Creative Endeavor Symposium. 12.