Title :
Burst synchronization for OFDM-based cellular systems with separate signaling channel
Author :
Stantchev, Branimir ; Fettweis, Gerhard
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. Dresden, Germany
Abstract :
A novel burst synchronization scheme suitable for a high rate OFDM/TDMA/TDD (pico)cellular system with a centralized dynamic slot allocation MAC protocol is presented. The physical layer may have an optional low-rate separate signaling channel (SSC) used in the standby mode and implemented on a subset of OFDM subcarriers. A one-shot feedforward synchronization concept for the OFDM-based active transmission mode is designed using the functionality of the SSC and a special periodical OFDM preamble. Joint symbol and frequency synchronization as well as channel estimation can be achieved simultaneously. The synchronizer features low complexity and low processing delay. Simulations verify its robust operation for indoor channel power delay profiles at 5 GHz
Keywords :
OFDM modulation; access protocols; computational complexity; delays; indoor radio; picocellular radio; synchronisation; telecommunication signalling; time division multiple access; time division multiplexing; 5 GHz; OFDM-based active transmission mode; OFDM-based cellular systems; SSC; TDD; TDMA; burst synchronization; centralized dynamic slot allocation MAC protocol; channel estimation; complexity; functionality; indoor channel power delay profiles; joint symbol frequency synchronization; one-shot feedforward synchronization; physical layer; picocellular system; processing delay; separate signaling channel; signaling channel; standby mode; subcarriers; Broadcasting; Delay estimation; Downlink; Frequency synchronization; Media Access Protocol; Mobile communication; OFDM modulation; Physical layer; Robustness; Time division multiple access;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.683683
