Generalised grouped minimum mean‐squared error‐based multi‐stage interference cancellation scheme for orthogonal frequency division multiple access uplink systems with carrier frequency offsets

Orthogonal Frequency Division Multiplexing Modulation and Inter-carrier Interference Cancellation

Carrier Frequency Offset Estimation for Orthogonal Frequency Division Multiplexing Systems

Carrier Frequency Offset Estimation for Orthogonal FrequencyDivision Multiplexing Systems Xiang Nian Zeng, Ph.D. Concordia University, 2008 Orthogonal frequency division multiplexing (OFDM) is an attractive modulation scheme used in wideband communications because it essentially transforms the frequency selective channel into a flat fading channel. Furthermore, the combination of multiple-input...

Resource allocation with interference coordination for relay-aided cellular orthogonal frequency division multiple access systems

Deployment of relay nodes (RNs) in cellular orthogonal frequency division multiple access (OFDMA) systems provides an effective solution to increase high data rate coverage and improve cell throughput. However, a challenging issue is that additional interferences caused by RNs may substantially compromise the performance gain if no measure is taken. In this study, the authors address the proble...

Multiuser Diversity Orthogonal Frequency Division Multiple Access Systems

Multiuser diversity can be used to significantly increase system throughput in wireless communication systems. The idea is to schedule users when they experience good channel conditions and let them wait when the channels are weak. In this thesis, several aspects on multiuser diversity OFDMA systems are investigated. An adaptive reduced feedback scheme for multiuser diversity OFDMA is proposed....

Channel-independent synchronization of orthogonal frequency division multiple access systems

We develop synchronization algorithms for both the downlink and the uplink of quasi-synchronous and asynchronous orthogonal frequency division multiple access systems. Unlike existing alternatives, the proposed timeand carrier-offset estimators do not require the transmission of known sequences and exhibit performance independent of the underlying channel zero locations. The only necessary assu...