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【文件名】:06523@52RD_5.part1(1).rar
【格 式】:rar
【大 小】:990K
【简 介】:The target of a mobile radio system is the provision of communication services to multiple mobile terminals (MTs). Due to the demand for mobility of the MTs, each MT in a mobile radio system communicates with at least one fixed access point (AP) by means of transmission of electromagnetic waves with frequencies in the radio frequency band [Gib99, Ste92, DB96,Wes02]. Each AP communicates either directly or indirectly with other fixed entities of the mobile radio system such as mobile switching centers [GSM98], which perform tasks related to the proper forwarding of information to and from the APs. Such fixed entities are collectively described by the term core network of the mobile radio system. The wireless interface between the MTs and the fixed APs is called the air interface of the mobile radio system. Concerning the air interface one can discern between uplink (UL) and downlink (DL) transmission [Gib99,Ste92, DB96], depending on whether information is sent from the MTs to the APs or vice versa. Performance measures of high importance to mobile radio system operators such as the quality of service [Ste92, HT02] or the number of MTs which can be simultaneously supported in a given bandwidth B and area A [Lee89, Vit91, Ste92] are essentially determined by the air interface. Hence, the design of the air interface of future mobile radio systems is of paramount importance and forms the main focus of the present thesis.
【目 录】:
1 Introduction 1
2 Channel modelling 20
3 Modelling of OFDM-based MIMO systems
4 Uplink transmission in the service area concept
5 Downlink transmission in the service area concept
6 Performance investigation of uplink transmission
7 Performance investigation of downlink transmission
8 Performance assessment of service area based systems
9 Summary
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