基于分布式天線的全雙工中繼系統(tǒng)最大化和速率波束成形設(shè)計(jì)

徐霄飛; 陳翔; 趙明; 周世東; 王京

doi:10.11999/JEIT150450

基于分布式天線的全雙工中繼系統(tǒng)最大化和速率波束成形設(shè)計(jì)

doi: 10.11999/JEIT150450 cstr: 32379.14.JEIT150450

2.
(清華大學(xué)電子工程系北京 100084) ②(清華大學(xué)信息科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室北京 100084) ③(中山大學(xué)信息科學(xué)與技術(shù)學(xué)院廣州 510275)

基金項(xiàng)目:

國(guó)家973計(jì)劃項(xiàng)目(2012CB316002)，國(guó)家863計(jì)劃項(xiàng)目(2014AA01 A707)，國(guó)家重大專項(xiàng)(2014ZX03003003-002)，國(guó)家自然科學(xué)基金(61201192)和華為科研合作

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- 文章訪問(wèn)數(shù): 1476
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出版歷程
- 收稿日期: 2015-04-20
- 修回日期: 2015-07-08
- 刊出日期: 2015-11-19

Sum-rate Maximizing Beamforming Design for Distributed-antenna Based Full-duplex Relay Systems

2.
(Department of Electronic Engineering, Tsinghua University, Beijing 100084, China)

Funds:

The National 973 Program of China (2012CB 316002)

摘要

摘要: 基于分布式天線的全雙工中繼系統(tǒng)結(jié)合了全雙工中繼兩跳同時(shí)同頻傳輸?shù)哪芰头植际教炀€高效覆蓋的特性，為提升小區(qū)邊緣和嚴(yán)重陰影衰落區(qū)域的頻譜效率提供了一種有效途徑。在自干擾抵消非理想的多用戶場(chǎng)景下，利用分布式多天線波束成形可實(shí)現(xiàn)對(duì)系統(tǒng)中自干擾和多用戶干擾的聯(lián)合抑制。為此，該文首先建立了在各分布式天線節(jié)點(diǎn)獨(dú)立發(fā)射功率約束下最大化多用戶端到端和速率的最優(yōu)化系統(tǒng)模型，進(jìn)而提出一種雙層迭代算法，解決原問(wèn)題的非凸性求解難題。仿真結(jié)果驗(yàn)證了算法的有效性，表明在多用戶分布式天線全雙工中繼系統(tǒng)中，所提波束成形設(shè)計(jì)能夠有效抑制自干擾和多用戶干擾，顯著提高系統(tǒng)頻譜效率。
- 全雙工中繼 /
- 分布式天線 /
- 波束成形 /
- 干擾抑制 /
- 和速率
Abstract: Distributed antenna based full-duplex relay system is capable of simultaneous transmission and reception in the same frequency band on two hops, and it provides uniform coverage for cell edge and deep shadow fading areas with increased spectral efficiency. In multiuser scenarios with non-ideal self interference cancellation, beamforming using multiple distributed antennas is proposed to suppress self interference and multiuser interference jointly. A system model for multiuser end-to-end sum-rate maximization under individual power constraints at distributed antennas is established first. Then, a dual-layer iterative algorithm is proposed to resolve the non-convexity of the problem. Simulation results validate the effectiveness of the proposal algorithm, showing that the proposed beamforming design can be used in distributed-antenna based full-duplex relay systems, to suppress both self interference and multiuser interference efficiently, and increase system spectral efficiency significantly.
- Full-duplex relay /
- Distributed antenna /
- Beamforming /
- Interference suppression /
- Sum-rate

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