基于OFDM星载交换的星地下行链路跨层设计

党军宏; 晏坚; 曹志刚

doi:10.3724/SP.J.1146.2008.01420

基于OFDM星载交换的星地下行链路跨层设计

doi: 10.3724/SP.J.1146.2008.01420

计量
- 文章访问数: 3728
- HTML全文浏览量: 51
- PDF下载量: 676
- 被引次数: 0
出版历程
- 收稿日期: 2008-11-03
- 修回日期: 2009-11-05
- 刊出日期: 2010-02-19

Downlink Cross-layer Design for On-board Switch OFDM Based Scheme

摘要

摘要: 该文基于一种全新的基于OFDM的星载交换方案，给出了此星载交换方案的星地下行链路跨层设计工作流程和相关实现方法，此方法根据星地下行链路信号发射功率上限、关于每个地面设备的当前点波束星地下行链路信道状态、每个星地下行链路传输业务目的地、业务类型、业务传输速率要求等参数，实现在属于不同地面设备的各个星地下行链路传输业务之间自适应分配子载波并自适应配置每个子载波的调制制式，生成每个传输业务与子载波的对应关系，充分利用链路资源并满足传输业务的QoS要求。
- 正交频分复用; 星载交换; 星地下行链路; 跨层设计
Abstract: This paper proposes an downlink cross-layer design procedure and algorithm for On-board switch scheme based on OFDM. The ultimate objective is to maximize the system downlink throughput subject to spot beam downlink transmit power constraint, downlink channel state information about each user, bit error ratio requirement of subcarrier after signal detection by users, and destination user and QoS of each service. The algorithm can adaptively allocate subcarriers and chose modulation scheme for every subcarrier among different users and services. Simulation results show that the proposed algorithm is able to guarantee consistent degree of QoS for the same service.

HTML全文

参考文献(1)

De Gaudenzi R. RD directions for next generation broadband multimedia systems: an Esa perspective[C]. 9th Ka and Broadband Communications Conference, Lacco Ameno, Italy, November 5-7, 2003: 764-769.[2]Falconio P, Catania F, and Amatol M. High quality qudio qervices over a L-band satellite link using COFDM with soft-decision[C]. Proceedings of the IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, Berlin, Germany, Sep, 2005: 2252-2256.[3]张琛, 付耀文, 张尔扬. QAM-OFDM卫星通信系统PAPR抑制方法研究[J]. 通信学报, 2006, 27(8): 67-72.Zhang Chen, Fu Yao-wen, and Zhang Er-yang. Research on PAPR reduction scheme in QAM-OFDM satellite communication system[J]. Journal on Communications, 2006, 27(8): 67-72.[4]党军宏, 晏坚, 曹志刚. 一种基于OFDM和跨层设计的星载交换系统[J]. 宇航学报, 2009, 30(3): 1086-1094.Dang Jun-hong, Yan Jian, and Cao Zhi-gang. An on-board switch scheme based on OFDM and cross-layer design[J]. Journal of Astronautics, 2009, 30(3): 1086-1094.[5]Wen W K and Z Y P. Transmit beam-tracking algorithm in FDD DMA cellular wireless system[J].IEE Electronics Letter.2004, 40(13):814-816[6]Fontan F, Castro M A, Cabado C, and Garcia J. Statistical modelling of the LMS channel[J].IEEE Transactions on Vehicular Technology.2001, 50(6):1549-1567[7]Scalise S, Mura R, and Mignone V. Air interfaces for satellite based digital TV broadcasting in the railway environment[J].IEEE Transactions on Broadcasting.2006, 52(2):158-166[8]Zhang G. Subcarrier and bit allocation for real-time services in multiuser OFDM systems[C]. IEEE ICC04, Paris, France, June 20-24, 2004: 2895-9298.[9]Yu G.[J].Zhang Z, and Chen Y, et al.. A novel resource allocation algorithm for for real-time services in multiuser OFDM systems[C]. IEEE VTC06, Melbourne Australia, May 7-1.2006,:-[10]Wong I C and Evans B L. Optimal downlink OFDMA resource allocation with linear complexity to maximize ergodic rates [J].IEEE Transactions on Wireless Communication.2008, 7(3):962-971

施引文献

资源附件(0)

访问统计