P. Tansongcharoen

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In this paper, we propose a new approach for MC-CDMA system in rich scattering environment. For our proposed system, an efficient MIMO technique, called as V-BLAST (vertical Bell Laboratories layered space-time), is applied in order to increase the capacity of uplink multi-carrier code division multiple access (MC-CDMA) system. High speed transmission can(More)
Two modified schemes of the recursive least squares (RLS) channel estimation algorithm are proposed. The proposed techniques employ a method for adjusting the adaptive weight (forgetting factor) of the RLS algorithm to exploit the time correlation of the channel response to improve the estimation accuracy and tracking capability. To verify the effectiveness(More)
We present the novel optimum signature sequence sets for improving the performance of the downlink MC-CDMA system over a frequency selective fading channel. The proposed optimum signature sequences are constructed by using the iterative technique. The set of optimum signature sequences minimizes the total squared correlations (TSC). They form the set of(More)
In this paper, we present a novel technique for blind carrier frequency offset (CFO) estimation in multi-carrier code division multiple access (MC-CDMA) under multipath Rayleigh fading channel. The proposed technique exploits the information about channel impulse response (CIR) duration to improve the accuracy of the maximum likelihood (ML) CFO estimator.(More)
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