Multiuser MIMO OFDM Based TDD/TDMA for Next Generation Wireless Communication Systems
Wireless Personal Communications: An International Journal
A CME based channel estimation approach for MIMO-OFDM systems
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
OFDM blind signal detection using the signal probability information
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
A hybrid CME-LS channel estimation approach for broadband MIMO-OFDM systems
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
Coded DS-CDMA systems with iterative channel estimation and no pilot symbols
IEEE Transactions on Wireless Communications
SAGE Algorithm for Semi-Blind Channel Estimation and Symbol Detection for STBC MIMO OFDM Systems
Wireless Personal Communications: An International Journal
| Hi-index | 0.01 |
A new blind channel estimation scheme for orthogonal frequency division multiplexing systems is proposed based on the maximum likelihood principle. By avoiding the use of second- and higher-order statistics, a very fast convergence rate is achieved. A novel approach is also proposed for resolving the phase ambiguity of the blind channel estimate without the need for any reference symbols. The approach combines different modulation schemes on adjacent subcarriers, such as 3-phase shift keying (PSK) and quarternary PSK (QPSK), to resolve phase ambiguity. Simulations were performed for mobile radio environments with high Doppler frequencies and short-to-medium delay spreads. The achieved performance is comparable to that of pilot-based channel estimation for the case of QPSK-modulation.