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一種線性化的全雙工MIMO收發(fā)器設(shè)計

張志亮,  沈瑩,  邵士海,  潘文生,  唐友喜

張志亮, 沈瑩, 邵士海, 潘文生, 唐友喜. 一種線性化的全雙工MIMO收發(fā)器設(shè)計[J]. 電子與信息學(xué)報, 2016, 38(9): 2227-2232. doi: 10.11999/JEIT151363
引用本文: 張志亮, 沈瑩, 邵士海, 潘文生, 唐友喜. 一種線性化的全雙工MIMO收發(fā)器設(shè)計[J]. 電子與信息學(xué)報, 2016, 38(9): 2227-2232. doi: 10.11999/JEIT151363
ZHANG Zhiliang, SHEN Ying, SHAO Shihai, PAN Wensheng, TANG Youxi. Novel Design of Linear Full-duplex MIMO Radios[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2227-2232. doi: 10.11999/JEIT151363
Citation: ZHANG Zhiliang, SHEN Ying, SHAO Shihai, PAN Wensheng, TANG Youxi. Novel Design of Linear Full-duplex MIMO Radios[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2227-2232. doi: 10.11999/JEIT151363

一種線性化的全雙工MIMO收發(fā)器設(shè)計

doi: 10.11999/JEIT151363 cstr: 32379.14.JEIT151363
  • 2.

    (電子科技大學(xué)通信抗干擾技術(shù)國家級重點實驗室 成都 611731) ②(四川大學(xué)錦城學(xué)院電子信息工程系 成都 611731)

基金項目: 

國家自然科學(xué)基金(61471108, 61501093)，國家科技重大專項(2014ZX03003001-002)

Novel Design of Linear Full-duplex MIMO Radios

  • 2.

    (National Key Laboratory of Communication, University of Electronic Science and Technology of China, Chengdu 611731, China)

Funds: 

The National Natural Science Foundation of China (61471108, 61501093), The National Major Projects (2014 ZX03003001-002)

  • 摘要: 針對全雙工MIMO收發(fā)器發(fā)射通道非線性以及接收通道存在強烈自干擾的問題，該文提出一種使發(fā)射通道線性化并通過射頻多抽頭重建與數(shù)字重建消除自干擾的具有較低硬件成本與軟件復(fù)雜度的設(shè)計方案：(1)基于改進的串?dāng)_消除和數(shù)字預(yù)失真(CTC-DPD)算法并復(fù)用反饋通道進行去耦合和數(shù)字預(yù)失真使發(fā)射通道線性化、等增益；(2)在接收通道加入可調(diào)衰減器并用多維梯度下降法基于接收的殘留自干擾功率最小原則調(diào)整抽頭參數(shù)；(3)基于頻域信道估計進行數(shù)字自干擾重建。實現(xiàn)的20 MHz帶寬LTE全雙工22 MIMO通信樣機，發(fā)射通道經(jīng)過線性化后帶內(nèi)更平坦，而帶外噪聲抑制了約30 dB。射頻和數(shù)字消除一輪調(diào)整共耗時約0.17 ms，總消除能力約75 dB。16QAM映射時全雙工雙向數(shù)據(jù)速率總和220 Mbps，相對單向時的110 Mbps實現(xiàn)了頻譜效率的翻倍。通信樣機證明了該方案的可行性。
    Abstract: Considering the issues of nonlinearity and self-interference in transmitting and receiving channels of a full-duplex MIMO radio respectively, a novel low hardware cost and low software complexity design scheme with transmitting channels linearization and self-interference cancellation by multi-tap RF cancellers and digital cancellers is proposed, where (1) An improved Cross-Talk Cancelling-Digital Pre-Distorter (CTC-DPD) algorithm and common feedback are used for decoupling and digital pre-distortion to make transmitting channels gain linearly and equally; (2) By introducing adjustable attenuators in receiving channels, multi-tap cancellers use received data along with minimum residual self-interference power criterion based multidimensional gradient descent method to search the multi-tap setting; (3) Digital self-interference is reconstructed for cancellation based on channel estimation in frequency domain. In the prototype of 20 MHz bandwidth LTE full-duplex 22 MIMO radio, transmitting channels have more flat in-band spectrum and 30 dB lower out-band noise after linearization. RF and digital self-interference cancellation need 0.17 ms for one turning and provide about 75 dB cancellation together. When two nodes with 16QAM mapping work at full-duplex mode, they achieve a sum of 220 Mbps bit rate, which double the bit rate of 110 Mbps at half-duplex mode and thus double the spectrum efficiency. The prototype demonstrates the feasibility of the proposed design.
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  • ZHANG Zhongshan, CHAI Xiaomeng, LONG Keping, et al. Full duplex techniques for 5G networks: Self-interference cancellation, protocol design, and relay selection[J]. IEEE Communications Magazine, 2015, 53(5): 128-137. doi: 10. 1109/MCOM.2015.7105651.
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出版歷程
  • 收稿日期:  2015-12-03
  • 修回日期:  2016-03-21
  • 刊出日期:  2016-09-19

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