IEEE Transactions on Signal Processing
Bit-interleaved coded modulation
IEEE Transactions on Information Theory
Pilot tone selection for channel estimation in a mobile OFDM system
IEEE Transactions on Consumer Electronics
New high-rate wireless LAN standards
IEEE Communications Magazine
Timing recovery for OFDM transmission
IEEE Journal on Selected Areas in Communications
Packet Design and Signal Processing for OFDM-Based Mobile Broadband Wireless Communication Systems
IEEE Transactions on Mobile Computing
A soft detector with good performance/complexity trade-off for a MIMO system
EURASIP Journal on Applied Signal Processing
Frequency domain estimation of time varying channels in OFDMA systems: an EM approach
DSP'09 Proceedings of the 16th international conference on Digital Signal Processing
Decision-directed least-squares phase perturbation compensation in OFDM systems
IEEE Transactions on Wireless Communications
Joint synchronization and channel estimation for OFDM transmissions over doubly selective channels
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
| Hi-index | 0.00 |
Abstract--We consider parameter estimation and error reduction for orthogonal frequency-division multiplexing (OFDM) based high-speed wireless local area networks (WLANs). We devise or select algorithms that can provide benefit to the overall system performance and can be efficiently implemented in real-time. In particular, first, we give a channel model which is especially useful for assessing the channel parameter estimation methods devised for OFDM-based WLANs. Second, we provide a sequential method for the estimation of carrier frequency offset (CFO), symbol timing, and channel response by exploiting the structure of the packet preamble specified by the IEEE 802.11a standard. Finally, to correct the residue CFO induced phase error using the pilot tones, we consider maximum-likelihood phase tracking and least-squares phase fitting approaches; to improve the channel estimation accuracy using the decoded data, we present a semiblind channel estimation method; to mitigate the sampling clock induced time delay error, we provide a sampling clock synchronization approach that obviates the need of an automatic frequency control clock recovery circuit. The overall system performance of using our algorithms is demonstrated via several numerical examples.