Title :
Finite-precision analysis of an OFDM burst synchronization scheme
Author :
Kabulepa, L.D. ; Glesner, M. ; Kella, T.
Author_Institution :
Inst. of Microelectron. Syst., Technische Hochschule Darmstadt, Germany
Abstract :
The performance of a packet-oriented OFDM system relies strongly on the goodness of the synchronization scheme. In practice, the theoretical accuracy of a synchronization technique can be worsened by the finite-precision effects introduced the digitization of signals. This work evaluates the impact of the quantization errors on the performance of the coarse timing synchronization and CORDIC (COordinate Rotation DIgital Computer)-based frequency compensation for OFDM burst-mode applications. Furthermore, an analytical approach allowing one to predict the wordlength according the required accuracy degree is proposed. Simulation results related to the application of this evaluation scheme to the HiperLAN/2 environment are presented
Keywords :
OFDM modulation; digital arithmetic; packet radio networks; quantisation (signal); roundoff errors; synchronisation; wireless LAN; CORDIC; HiperLAN/2 environment; OFDM burst synchronization; broadband signal transmission; burst-mode applications; coarse timing synchronization; coordinate rotation digital computer; finite-precision analysis; finite-precision effects; frequency compensation; frequency offset estimation; indoor radio propagation; packet-oriented OFDM system; peak detection; quantization error; quantization errors; quantization noise; signals digitization; simulation results; wireless LAN; wordlength optimization; wordlength prediction; Application software; Computational modeling; Frequency estimation; Frequency synchronization; Hardware; Microelectronics; OFDM; Quantization; Robustness; Timing;
Conference_Titel :
Global Telecommunications Conference, 2001. GLOBECOM '01. IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-7206-9
DOI :
10.1109/GLOCOM.2001.965129
