Yew Kuan Min

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In most communication system, multiple users need to be supported. In OFDM systems, multiple access is achieved through combining TDMA and FDMA. OFDM supports multiusers with popular multiple access schemes, these schemes are MC - CDMA and OFDMA. In this paper we propose a precoding based approach to multiple access in OFDM systems using singular value(More)
In this paper, we present a study of frame timing synchronization for WiMAX applications. The two synchronization algorithms analyzed are Schmidl and Cox technique and double sliding window packet detection. The accuracy and performance of both methods are quantified in terms of mean squared error between the exact and the estimated start of a frame. It is(More)
Orthogonal frequency division multiplexing (OFDM) is a key enabling technology for future wireless communications systems. OFDM makes equalization simple and effective. However, accurate channel estimates are necessary at the receiver for the optimum operation of OFDM systems. Channel estimation usually employs some form of training signal, also known as(More)
In this paper, we present our study on the peak-to-average power ratio (PAPR) of precoding-based orthogonal frequency division multiplexing (OFDM) systems. We analyze the probability density functions of various types of precoded OFDM signals. Then we show that the precoders can change the statistical properties of OFDM signals and hence the distribution of(More)
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