Doubly selective channel estimation using superimposed training and exponential bases models
EURASIP Journal on Applied Signal Processing
On Superimposed Training for MIMO Channel Estimation and Symbol Detection
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Optimal training design for MIMO OFDM systems in mobile wireless channels
IEEE Transactions on Signal Processing
Channel estimation using implicit training
IEEE Transactions on Signal Processing
Superimposed training for OFDM: a peak-to-average power ratio analysis
IEEE Transactions on Signal Processing - Part I
IEEE Transactions on Signal Processing
On the effect of receiver estimation error upon channel mutual information
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Simplified channel estimation for OFDM systems with multiple transmit antennas
IEEE Transactions on Wireless Communications
Bandwidth Efficient Channel Estimation Using Super-Imposed Pilots in OFDM Systems
IEEE Transactions on Wireless Communications
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels
IEEE Journal on Selected Areas in Communications
Iterative frequency domain channel estimation for dft-precoded ofdm systems using in-band pilots
IEEE Journal on Selected Areas in Communications
| Hi-index | 0.00 |
In this work an iterative time domain Least Squares (LS) based channel estimation method using superimposed training (ST) for a Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system over time varying frequency selective fading channels is proposed. The performance of the channel estimator is analyzed in terms of the Mean Square Estimation Error (MSEE) and its impact on the uncoded Bit Error Rate (BER) of the MIMO-OFDM system is studied. A new selection criterion for the training sequences that jointly optimizes the MSEE and the BER of the OFDM system is proposed. Chirp based sequences are proposed and shown to satisfy the same. These are compared with the other sequences proposed in the literature and are found to yield a superior performance. The sequences, one for each transmitting antenna, offers fairness through providing equal interference in all the data carriers unlike earlier proposals. The effectiveness of the mathematical analysis presented is demonstrated through a comparison with the simulation studies. Experimental studies are carried out to study and validate the improved performance of the proposed scheme. The scheme is applied to the IEEE 802.16e OFDM standard and a case is made with the required design of the sequence.