Cellular MC-CDMA Downlink Systems Coordination, Cancellation, and Use of Inter-Cell Interference
In this thesis a cellular multi-carrier code division multiple access (MC-CDMA) downlink system is investigated on the physical layer. This multi-carrier technique is a candidate for future mobile communications systems. First, the influence and characteristic of the emerging inter-cell interference at the critical cell border are described. This allows an appropriate modeling of the inter-cell interference. Three different approaches for handling inter-cell interference situations are developed. Coordination schemes of orthogonal resources from the network side are described such as frequency reuse or spreading codes. At the receiver soft iterative inter-cell interference cancellation schemes are introduced. Finally, cellular diversity is developed which combines macro diversity and transmit diversity techniques, e.g., cyclic delay diversity or the Alamouti scheme.