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A new dual- LTE-A and robustness of the design

Author: YuJin
Tutor: WangDeSheng
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: LTE-A Precoding Double codebook Antenna Calibration
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 63
Quote: 0
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Abstract


The communication data rate mobile user needs and available frequency bandwidth is limited conflicts, as the number of users continues to grow with the rapid development of multimedia services, have become increasingly prominent. In order to improve the reliability and validity of wireless communications, researchers from the time domain, frequency domain and other dimensions of the radio resources to explore, and TDMA and CDMA systems are widely used. And the time domain, frequency domain technology matures different dimensions, in recent years, the discovery and utilization of airspace resources, as a new frontier, attracting a large number of researchers' enthusiasm, and made quite fast development. MIMO system into airspace, even in the multiplexing and diversity can achieve good compromise between and application, however, the existing theoretical analysis, mostly based on the sending and receiving side is aware of the channel state information, However, in the MIMO / OFDM as the core technology The LTE-A system, driven by the amount of feedback channel constraints, can not get a true, complete channel state information; Furthermore, MIMO antenna erected by the accuracy of the actual size and the actual impact of the channel information is bound to result in an estimated bias. Thus, in the lowest possible amount of feedback channel conditions, access to the highest possible precision channel information directly or indirectly, and with high robustness channel access method, the future development of LTE-A is one of the key issues needed to solve . In this paper, major special \presents a LTE-A 8Tx of W2 × W1 double structure of the new codeword codebook; fully consider the codeword structure multipath channel caused by the fast fading characteristics and because of the distance caused by slow fading of its characteristics change feedback for the channel corresponding to the short-term and long-term feedback corresponding W1 W2. Single code word to overcome defects larger amount of feedback information. The proposed codebook codebook compared with Samsung Universal has better SINR performance. On this basis, for the accuracy of the antenna size and layout of the code word cover, this double code word of the proposed solutions and to compare the robustness of existing programs. Simulation results show that there is a phase shift in the case, the proposed code word has better robustness. The proposed dual codeword codeword covered with robustness analysis, enriching the LTE-A codebook design resources, but also for the robustness of the code provides a new analytical method.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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