Dissertation > Excellent graduate degree dissertation topics show

Broadband wireless communications multi-user scheduling and diversity techniques

Author: ZhanZuo
Tutor: ZhuGuangXi
School: Huazhong University of Science and Technology
Course: Information and Communication Engineering
Keywords: Multi-input multi-output system Multi-user scheduling Resource allocation Channel capacity Multiuser mode transmission characteristics
CLC: TN92
Type: Master's thesis
Year: 2011
Downloads: 12
Quote: 0
Read: Download Dissertation

Abstract


The rapid development of modern science and technology, the development of wireless communications and wireless communications people's needs and has been quite different compared to the past decade, wireless communication transmission from the previous text and audio-based gradually shifted to the live video and image transmission Lord's next-generation communications systems. The corresponding spectrum resources and does not increase if the need to provide higher speed and better quality of service for the need to improve the spectrum efficiency. Secondly, the radio channel fading, multipath and time-varying characteristics of the reliability of the signal has a great influence. The space-time processing technology, especially in multi-input multi-output (MIMO) technology as the core technology of B3G or 4G, one can greatly improve system speed, improve the reliability of wireless communication, can solve these problems. Using space-time coding MIMO system can improve system reliability and increase coverage of the system, well adapted to the needs of future wireless communication. This paper studies the future communication system key technologies: multi-user MIMO system downlink broadcast channel transmission technology and multi-user communication system for multi-user scheduling mechanism. In multiuser MIMO downlink broadcast channel system study, this paper studied the characteristics of multi-user mode transfer (MET), MET linear pre-coding system with the best performance, you can reach almost in dirty paper coding results. MET can send several spatially multiplexed streams to multiple users, greatly enhance the system capacity. Because the base station transmit antenna and limit the number of user receiving antennas, MET same time the number of service users is limited, the need for the user to select, and exhaustive search algorithm limits the high complexity of its application. This paper introduces a new recursive user selection algorithm, reducing the user to select the complexity of algorithm complexity has been reduced. For multi-user MIMO system downlink broadcast channel resource allocation and user scheduling, we propose a new multi-user proportional fair scheduling based on adaptive algorithms. The base station side with MET to eliminate inter-user interference and increase system throughput, the transmission rate of the user to ensure the case of proportional fairness scheduling and use of the proposed adaptive proportional fair scheduling algorithm to improve the fairness of the system, at the same time the user to choose the best set to transmit. Simulation and analysis show that the proposed adaptive algorithm can not only ensure the system's speed, but also improve the fairness of the system.

Related Dissertations

  1. Adaptive Adjustment of fire emergency plan,X928.7
  2. Resource allocation impact on rural governance,D422.6
  3. The Research of Multi-user Scheduling of RRM for LTE,TN929.5
  4. Optimal Resource Allocation for the Orthogonal Relay Eavesdropper Channel,TN929.5
  5. A Beamforming Algorithm Based Relay Matrix,TN929.5
  6. Research on Dynamic Resource Allocation Strategies for TD-LTE System,TN929.5
  7. Research on Dynamic Resources Allocation of Multi-user CR-OFDM System,TN919.3
  8. Research on Relay Selection Strategy Based on Power Allocation,TN929.5
  9. The Study of Multi-polarized MIMO Channel,TN821.1
  10. Astudy and Analysis on the Channel Capacity of MIMO System,TN919.3
  11. The Research on Implementations of Space-time Coding Echnology for MIMO System,TN919.3
  12. Resource Management Mechanism for QoS in Cognitive Networks,TN915.09
  13. The Research of Power Allocation in Cooperation Communications,TN925
  14. Shanghai World Expo , \,F713.8
  15. The user scheduling MIMO cognitive and physical layer security technology research,TN925
  16. And medium-sized industrial enterprises in Hebei Province Technology Resource Allocation Efficiency Analysis,F224;F425
  17. Network covert channel time and Interference Technology,TP393.08
  18. Mixed steel processing operations for resource allocation method,F426.31
  19. Automated production plant simulation and optimization of resource allocation,O226
  20. Resource allocation based radar jamming Penetration Trajectory Planning Research,TN974
  21. Radar jamming and interference covering optimal allocation of resources,TN974

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications
© 2012 www.DissertationTopic.Net  Mobile