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This paper proposes a blind carrier frequency offset (CFO) estimation algorithm based on estimating signal parameters via rotational invariance techniques (ESPRIT) algorithm for the interleaved orthogonal frequency division multiple access (OFDMA) uplinks. This method utilizes the special periodic structure of the received signal and the subspace rotational invariance techniques to estimate the CFO...
This paper proposes a blind carrier frequency offset (CFO) estimation algorithm based on improved MUSIC algorithm for the interleaved orthogonal frequency division multiple access (OFDMA) uplinks. The main advantages of this method are that it obtains the CFOs of all users simultaneously within only one OFDMA block and has high accuracy due to the application of data reconstruction and the special...
This paper presents a new bit and power allocation scheme for OFDM systems with low computational complexity in which the overall transmission power is minimized by constraining the fixed data rate and bit error rate. The algorithm and simulation include two stages. The first stage involves the application of a target BER and SNR of each sub-carrier for a variable-rate bit pre-allocation. The second...
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