ML Time Domain Channel Estimation and Equalization for OFDM Without Guard Interval
| Paper File | Download Paper File | | Appear In | 2005 2th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2005) | | Publication Date | 12/05/2005 - 13/05/2005 | | Volume | 1 | | Pages | 473 - 476 | | Author 1 | Gagik Mkrtchyan | | Author 2 | Katsuhiro Naito | | Author 3 | Kazuo Mori | | Author 4 | Hideo Kobayashi |
Abstract
Proposed Maximum Likelihood (ML) time domain
channel estimation and equalization method provides a
simple, robust scheme for compensation of the Inter-
Symbol Interference (ISI) and Inter-Carrier Interference
(ICI) in OFDM system without Guard Interval (GI)
using Scattered Pilots (SP). The method employs direct
estimation of channel’s impulse response, which
compared with other methods that use frequency
domain estimation, does not suffer from ICI. Also it
does not use FFT, which for case of OFDM without GI
actually becomes the source of ICI, and requires
additional ICI cancellation. Simulation results show that
proposed scheme can achieve higher bandwidth
efficiency and lower Bit Error Rate (BER) than
conventional frequency domain methods. |
