Patent Document ID: 20100322225
Application ID: 12705574
Patent Flag: 0

Claim One:
1. A superimposed training (ST) based channel estimation method for equalization in uplink OFDMA systems adapted to ensure improved performance and higher bandwidth efficiency, comprising: an iterative time domain least squares based channel estimation involving superimposed training sequences based uplink OFDMA/SC-FDMA; using available coherence time and coherence bandwidth of the channel in a computationally efficient manner involving an estimator; bit error rate (BER) used as the criterion for the choice of the training sequence for ST based OFDMA; a chirp based training sequence with uniform energy in all the subcarriers being added to the data adapted to minimizing the bit error rate (BER); said sequence providing for reducing the error floor in the BER in the first stage of iterative process for achieving desired performance and bandwidth efficiency reducing the computational complexity; and reducing the data interference in the channel estimate in each iteration of the estimator involving interference canceller.