Title :
A study of data rate equivalent UW-OFDM and CP-OFDM concepts
Author :
Hofbauer, Christian ; Huemer, Mario
Author_Institution :
Inst. of Networked & Embedded Syst., Klagenfurt Univ., Klagenfurt, Austria
Abstract :
Unique word - orthogonal frequency division multiplexing (UW-OFDM) is a novel transmit signal structure for OFDM where the usual cyclic prefixes (CPs) are replaced by deterministic sequences, the so-called UWs. Since unique words represent known sequences, they can advantageously be used for synchronization and estimation tasks, but also for improving the bit error ratio (BER) behavior of an UW-OFDM system. Recent research results have demonstrated the superior BER behavior of UW-OFDM over conventional CP-OFDM used for real-world communication systems, e.g. for the IEEE 802.11a WLAN standard. In this paper we extend these investigations by considering different and data rate equivalent UW-OFDM and CP-OFDM configuration setups. We show simulation results for various frequency selective environments and additionally compare UW-OFDM with UW based single carrier/frequency domain equalization (UW-SC/FDE) systems.
Keywords :
OFDM modulation; cyclic codes; error statistics; estimation theory; synchronisation; wireless LAN; BER behavior; CP-OFDM; IEEE 802.11a WLAN standard; UW based single carrier/frequency domain equalization system; UW-OFDM system; UW-SC/FDE system; bit error ratio; cyclic prefixes; data rate; deterministic sequence; estimation task; frequency selective environment; real-world communication system; synchronization; transmit signal structure; unique word-orthogonal frequency division multiplexing; Cyclic Prefix (CP); Unique Word based Single Carrier/Frequency Domain Equalization (UW-SC/FDE); non-systematic coded Unique Word OFDM (UW-OFDM);
Conference_Titel :
Signals, Systems and Computers (ASILOMAR), 2012 Conference Record of the Forty Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4673-5050-1
DOI :
10.1109/ACSSC.2012.6488983
