OFDM-OAM Modulation for Future Wireless Communications

Channel Estimation for Wireless OFDM Communications

1.1 Preliminary Orthogonal frequency-division multiplexing (OFDM) communication techniques have recently received significant research attention because of their ability to maintain effective transmission and highly efficient bandwidth utilization in the presence of various channel impairments, such as severely frequency-selective channel fades caused by long multipath delay spreads and impulsi...

Mimo-ofdm Wireless Communications with Matlab Mimo-ofdm Wireless Communications with Matlab

Proposal of Adaptive Downlink Modulation Using OFDM and MC-CDMA for Future Mobile Communications System

To meet the strong demand for broadband multimedia services by both nomadic and mobile users, it is important to increase the bit rate of future mobile communications systems. To enhance system capacity, novel technologies or new concepts for improving bandwidth efficiency are indispensable. In this paper, an adaptive downlink modulation using OFDM and MC-CDMA is presented for maximizing the sy...

Hadamard Coded Modulation: An Alternative to OFDM for Optical Wireless Communications

Orthogonal frequency division multiplexing (OFDM) is a modulation technique susceptible to source, channel and amplifier nonlinearities because of its high peak-toaverage ratio (PAPR). The distortion gets worse by increasing the average power of the OFDM signals since larger portion of the signals are affected by nonlinearity. In this paper we introduce Hadamard coded modulation (HCM) that uses...

Joint Detection and Decoding of High-Order Modulation Schemes for CDMA and OFDM Wireless Communications

Title of Dissertation: JOINT DETECTION AND DECODING OF HIGH-ORDER MODULATION SCHEMES FOR CDMA AND OFDM WIRELESS COMMUNICATIONS Yingjiu Xu, Doctor of Philosophy, 2003 Dissertation directed by: Professor John S. Baras Department of Electrical and Computer Engineering Wireless communications call for high data rate, power and bandwidth efficient transmissions. High-order modulation schemes are sui...