Ashraphijuo, Mehdi; Aggarwal, Vaneet; Wang, Xiaodong On the capacity regions of two-way diamond channels. (English) Zbl 1359.94296 IEEE Trans. Inf. Theory 61, No. 11, 6060-6090 (2015). MSC: 94A17 94A40 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Yilmaz, Yasin; Wang, Xiaodong Sequential distributed detection in energy-constrained wireless sensor networks. (English) Zbl 1394.94795 IEEE Trans. Signal Process. 62, No. 12, 3180-3193 (2014). MSC: 94A13 94A12 90B18 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Wu, Hao; Wang, Liming; Wang, Xiaodong; You, Xiaohu Asymptotic and non-asymptotic analysis of uplink sum rate for relay-assisted MIMO cellular systems. (English) Zbl 1394.94903 IEEE Trans. Signal Process. 62, No. 6, 1348-1360 (2014). MSC: 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Yilmaz, Yasin; Wang, Xiaodong Sequential decentralized parameter estimation under randomly observed Fisher information. (English) Zbl 1364.94258 IEEE Trans. Inf. Theory 60, No. 2, 1281-1300 (2014). MSC: 94A17 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Wang, Xiaodong; Liu, F.; Jiao, L. C.; Wu, Jiao; Chen, Jianrui Incomplete variables truncated conjugate gradient method for signal reconstruction in compressed sensing. (English) Zbl 1355.94018 Inf. Sci. 288, 387-411 (2014). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Xiang, Zhengzheng; Tao, Meixia; Mo, Jianhua; Wang, Xiaodong Degrees of freedom for MIMO two-way X relay channel. (English) Zbl 1393.94895 IEEE Trans. Signal Process. 61, No. 7, 1711-1720 (2013). MSC: 94A40 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Yilmaz, Yasin; Moustakides, George V.; Wang, Xiaodong Channel-aware decentralized detection via level-triggered sampling. (English) Zbl 1393.94629 IEEE Trans. Signal Process. 61, No. 2, 300-315 (2013). MSC: 94A13 94A20 94A29 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Ashraphijuo, Mehdi; Aggarwal, Vaneet; Wang, Xiaodong On the capacity region and the generalized degrees of freedom region for the MIMO interference channel with feedback. (English) Zbl 1364.94222 IEEE Trans. Inf. Theory 59, No. 12, 8357-8376 (2013). MSC: 94A17 94A40 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Jajamovich, Guido H.; Tajer, Ali; Wang, Xiaodong Minimax-optimal hypothesis testing with estimation-dependent costs. (English) Zbl 1393.94277 IEEE Trans. Signal Process. 60, No. 12, 6151-6165 (2012). MSC: 94A12 62F03 62F10 62F15 92D20 × Cite Format Result Cite Review PDF Full Text: DOI
Yilmaz, Yasin; Moustakides, George V.; Wang, Xiaodong Cooperative sequential spectrum sensing based on level-triggered sampling. (English) Zbl 1393.94727 IEEE Trans. Signal Process. 60, No. 9, 4509-4524 (2012). MSC: 94A20 94A13 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Wang, Kun; Wang, Xiaodong; Xu, Weiqiang; Zhang, Xianda Coordinated linear precoding in downlink multicell MIMO-OFDMA networks. (English) Zbl 1393.94480 IEEE Trans. Signal Process. 60, No. 8, 4264-4277 (2012). MSC: 94A12 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Jajamovich, Guido H.; Wang, Xiaodong Maximum-parsimony haplotype inference based on sparse representations of genotypes. (English) Zbl 1391.92031 IEEE Trans. Signal Process. 60, No. 4, 2013-2023 (2012). MSC: 92D15 94A17 × Cite Format Result Cite Review PDF Full Text: DOI
Moustakides, George V.; Jajamovich, Guido H.; Tajer, Ali; Wang, Xiaodong Joint detection and estimation: optimum tests and applications. (English) Zbl 1365.94103 IEEE Trans. Inf. Theory 58, No. 7, 4215-4229 (2012). MSC: 94A13 62M07 62M09 62F15 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Tajer, Ali; Wang, Xiaodong \((n,K)\)-user interference channels: degrees of freedom. (English) Zbl 1364.94458 IEEE Trans. Inf. Theory 58, No. 8, 5338-5353 (2012). MSC: 94A40 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Tajer, Ali; Castro, Rui M.; Wang, Xiaodong Adaptive sensing of congested spectrum bands. (English) Zbl 1364.94166 IEEE Trans. Inf. Theory 58, No. 9, 6110-6125 (2012). MSC: 94A12 94A40 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Font-Segura, J.; Su, Yongtao; Wang, Xiaodong Robust non-linear precoding for downlink multiuser multiple-input multiple-output orthogonal frequency-division multiplexing systems with limited feedback. (English) Zbl 1273.94274 IET Commun. 6, No. 12, 1734-1741 (2012). MSC: 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Tajer, Ali; Wang, Xiaodong Information exchange limits in cooperative MIMO networks. (English) Zbl 1392.94477 IEEE Trans. Signal Process. 59, No. 6, 2927-2942 (2011). MSC: 94A12 94A40 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Tajer, Ali; Prasad, Narayan; Wang, Xiaodong Robust linear precoder design for multi-cell downlink transmission. (English) Zbl 1392.94775 IEEE Trans. Signal Process. 59, No. 1, 235-251 (2011). MSC: 94A29 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Uppal, Momin; Yue, Guosen; Wang, Xiaodong; Xiong, Zixiang A rateless coded protocol for half-duplex wireless relay channels. (English) Zbl 1392.94878 IEEE Trans. Signal Process. 59, No. 1, 209-222 (2011). MSC: 94A40 68M14 × Cite Format Result Cite Review PDF Full Text: DOI
Wu, Jiao; Liu, Fang; Jiao, L. C.; Wang, Xiaodong; Hou, Biao Multivariate compressive sensing for image reconstruction in the wavelet domain: using scale mixture models. (English) Zbl 1374.94409 IEEE Trans. Image Process. 20, No. 12, 3483-3494 (2011). MSC: 94A08 94A11 × Cite Format Result Cite Review PDF Full Text: DOI
Wu, Jiao; Liu, Fang; Jiao, L. C.; Wang, Xiaodong Compressive sensing SAR image reconstruction based on Bayesian framework and evolutionary computation. (English) Zbl 1372.94273 IEEE Trans. Image Process. 20, No. 7, 1904-1911 (2011). MSC: 94A08 62H35 × Cite Format Result Cite Review PDF Full Text: DOI
Jajamovich, Guido H.; Lops, Marco; Wang, Xiaodong Space-time coding for MIMO radar detection and ranging. (English) Zbl 1392.94624 IEEE Trans. Signal Process. 58, No. 12, 6195-6206 (2010). MSC: 94A13 78A50 × Cite Format Result Cite Review PDF Full Text: DOI
Tajer, Ali; Prasad, Narayan; Wang, Xiaodong Beamforming and rate allocation in MISO cognitive radio networks. (English) Zbl 1392.94476 IEEE Trans. Signal Process. 58, No. 1, 362-377 (2010). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Prasad, Narayan; Venturino, Luca; Wang, Xiaodong Diversity-multiplexing tradeoff analysis for OFDM systems with subcarrier grouping, linear precoding, and linear detection. (English) Zbl 1366.94316 IEEE Trans. Inf. Theory 56, No. 12, 6078-6096 (2010). MSC: 94A29 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Yang, Kai; Prasad, Narayan; Wang, Xiaodong An auction approach to resource allocation in uplink OFDMA systems. (English) Zbl 1392.94540 IEEE Trans. Signal Process. 57, No. 11, 4482-4496 (2009). MSC: 94A12 90B18 91B26 91B32 × Cite Format Result Cite Review PDF Full Text: DOI
Hormis, Raju; Linzer, Elliot; Wang, Xiaodong Adaptive mode- and diversity-control for video transmission on MIMO wireless channels. (English) Zbl 1391.94672 IEEE Trans. Signal Process. 57, No. 9, 3624-3637 (2009). MSC: 94A40 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Prasad, Narayan; Li, Kai; Wang, Xiaodong Fair-rate allocation in multiuser OFDM-SDMA networks. (English) Zbl 1391.94034 IEEE Trans. Signal Process. 57, No. 7, 2797-2808 (2009). MSC: 94A05 × Cite Format Result Cite Review PDF Full Text: DOI
Prasad, Narayan; Wang, Xiaodong Outage minimization and rate allocation for the multiuser Gaussian interference channels with successive group decoding. (English) Zbl 1367.94174 IEEE Trans. Inf. Theory 55, No. 12, 5540-5557 (2009). MSC: 94A24 94B35 × Cite Format Result Cite Review PDF Full Text: DOI
Liang, Kuo-ching; Wang, Xiaodong; Anastassiou, Dimitris A sequential Monte Carlo method for motif discovery. (English) Zbl 1390.94272 IEEE Trans. Signal Process. 56, No. 9, 4496-4507 (2008). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Yue, Guosen; Wang, Xiaodong; Yang, Zigui; Høst-Madsen, Anders Coding schemes for user cooperation in low-power regimes. (English) Zbl 1390.94711 IEEE Trans. Signal Process. 56, No. 5, 2035-2049 (2008). MSC: 94A29 94A05 × Cite Format Result Cite Review PDF Full Text: DOI
Li, Chuxiang; Wang, Xiaodong Cooperative multibeamforming in ad hoc networks. (English) Zbl 1184.94112 EURASIP J. Adv. Signal Process. 2008, Article ID 310247, 11 p. (2008). MSC: 94A12 68M10 90B18 × Cite Format Result Cite Review PDF Full Text: DOI
Prasad, Narayan; Yue, Guosen; Wang, Xiaodong; Varanasi, Mahesh Optimal successive group decoders for MIMO multiple-access channels. (English) Zbl 1319.94112 IEEE Trans. Inf. Theory 54, No. 11, 4821-4846 (2008). MSC: 94B35 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Prasad, Narayan; Berenguer, Inaki; Wang, Xiaodong Design of spherical lattice space-time codes. (English) Zbl 1319.94032 IEEE Trans. Inf. Theory 54, No. 11, 4847-4865 (2008). MSC: 94A29 94B35 × Cite Format Result Cite Review PDF Full Text: DOI
Prasad, Narayan; Varanasi, Mahesh K.; Venturino, Luca; Wang, Xiaodong An analysis of the MIMO-SDMA channel with space-time orthogonal and quasi-orthogonal user transmissions and efficient successive cancellation decoders. (English) Zbl 1256.94031 IEEE Trans. Inf. Theory 54, No. 12, 5427-5446 (2008). MSC: 94A40 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Li, Kai; Yue, Guosen; Wang, Xiaodong; Ping, Li Low-rate repeat-zigzag-Hadamard codes. (English) Zbl 1304.94019 IEEE Trans. Inf. Theory 54, No. 2, 531-543 (2008). MSC: 94A24 94A34 × Cite Format Result Cite Review PDF Full Text: DOI
Aggarwal, Pradeep; Prasad, Narayan; Wang, Xiaodong An enhanced deterministic sequential Monte Carlo method for near-optimal MIMO demodulation with QAM constellations. (English) Zbl 1391.94567 IEEE Trans. Signal Process. 55, No. 6, Part 1, 2395-2406 (2007). MSC: 94A14 × Cite Format Result Cite Review PDF Full Text: DOI
Vercauteren, Tom; Toledo, Alberto Lopez; Wang, Xiaodong Batch and sequential Bayesian estimators of the number of active terminals in an IEEE 802.11 network. (English) Zbl 1391.94428 IEEE Trans. Signal Process. 55, No. 2, 437-450 (2007). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Li, Chuxiang; Wang, Xiaodong Adaptive subchannel allocation in multiuser multicarrier systems. (English) Zbl 1273.94289 IET Commun. 1, No. 3, 414-423 (2007). MSC: 94A40 94A05 × Cite Format Result Cite Review PDF Full Text: DOI
Yue, Guosen; Ping, Li; Wang, Xiaodong Generalized low-density parity-check codes based on Hadamard constraints. (English) Zbl 1310.94229 IEEE Trans. Inf. Theory 53, No. 3, 1058-1079 (2007). MSC: 94B60 94A24 × Cite Format Result Cite Review PDF Full Text: DOI
Khojastepour, M. A.; Wang, X.; Mahidian, M. Optimization of wireless multiple antenna communication system throughput via quantized rate control. (English) Zbl 1122.94004 Agrawal, Prathima (ed.) et al., Wirelesse communications. Invited papers based on the presentations at the IMA summer school program on wireless communications, University of Minnesota, June 22 – July 1, 2005. New York, NY: Springer (ISBN 0-387-37269-5/hbk). The IMA Volumes in Mathematics and its Applications 143, 125-162 (2007). MSC: 94A05 93B35 × Cite Format Result Cite Review PDF
Guo, Dong; Wang, Xiaodong Quasi-Monte Carlo filtering in nonlinear dynamic systems. (English) Zbl 1375.94067 IEEE Trans. Signal Process. 54, No. 6, Part 1, 2087-2098 (2006). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Venturino, L.; Wang, Xiaodong; Lops, M. Multiuser detection for cooperative networks and performance analysis. (English) Zbl 1373.94817 IEEE Trans. Signal Process. 54, No. 9, 3315-3329 (2006). MSC: 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Li, Kai; Wang, Xiaodong Cross-layer optimization for LDPC-coded multirate multiuser systems with QoS constraints. (English) Zbl 1373.94867 IEEE Trans. Signal Process. 54, No. 7, 2567-2578 (2006). MSC: 94A29 × Cite Format Result Cite Review PDF Full Text: DOI
Wang, Xiaodong; Krishnamurthy, V.; Wang, Jibing Stochastic gradient algorithms for design of minimum error-rate linear dispersion codes in MIMO wireless systems. (English) Zbl 1373.94883 IEEE Trans. Signal Process. 54, No. 4, 1242-1255 (2006). MSC: 94A29 90C52 × Cite Format Result Cite Review PDF Full Text: DOI
Reynolds, Daryl; Wang, Xiaodong; Modi, Kirtan N. Interference suppression and diversity exploitation for multiantenna CDMA with ultra-low complexity receivers. (English) Zbl 1370.94220 IEEE Trans. Signal Process. 53, No. 8, Part 2, 3226-3237 (2005). MSC: 94A12 78A50 × Cite Format Result Cite Review PDF Full Text: DOI
Vercauteren, Tom; Wang, Xiaodong Decentralized sigma-point information filters for target tracking in collaborative sensor networks. (English) Zbl 1370.94268 IEEE Trans. Signal Process. 53, No. 8, Part 2, 2997-3009 (2005). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Berenguer, Inaki; Wang, Xiaodong; Krishnamurthy, Vikram Adaptive MIMO antenna selection via discrete stochastic optimization. (English) Zbl 1370.94068 IEEE Trans. Signal Process. 53, No. 11, 4315-4329 (2005). MSC: 94A12 90C15 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Wang, Xiaodong; Yue, Guosen; Narayanan, Krishna R. Optimization of LDPC-coded turbo CDMA systems. (English) Zbl 1370.94587 IEEE Trans. Signal Process. 53, No. 4, 1500-1510 (2005). MSC: 94B15 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Dong, B.; Wang, Xiaodong Adaptive mobile positioning in WCDMA networks. (English) Zbl 1123.94385 EURASIP J. Wirel. Commun. Netw. 2005, No. 3, 343-353 (2005). MSC: 94A99 × Cite Format Result Cite Review PDF Full Text: DOI
Lu, Ben; Yue, Guosen; Wang, Xiaodong; Madihian, Mohammad Factor-graph-based soft self-iterative equalizer for multipath channels. (English) Zbl 1107.94356 EURASIP J. Wirel. Commun. Netw. 2005, No. 2, 187-196 (2005). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Yang, Zigang; Guo, Dong; Wang, Xiaodong Blind decoding of multiple description codes over OFDM systems via sequential Monte Carlo. (English) Zbl 1107.94382 EURASIP J. Wirel. Commun. Netw. 2005, No. 2, 141-154 (2005). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Xu, Zhengyuan; Liu, Ping; Wang, Xiaodong Blind multiuser detection: from MOE to subspace methods. (English) Zbl 1369.94380 IEEE Trans. Signal Process. 52, No. 2, 510-524 (2004). MSC: 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Lu, Ben; Yue, Guosen; Wang, Xiaodong Performance analysis and design optimization of LDPC-coded MIMO OFDM systems. (English) Zbl 1369.94483 IEEE Trans. Signal Process. 52, No. 2, 348-361 (2004). MSC: 94A40 94A29 × Cite Format Result Cite Review PDF Full Text: DOI
Guo, Dong; Wang, Xiaodong; Chen, Rong Wavelet-based sequential Monte Carlo blind receivers in fading channels with unknown channel statistics. (English) Zbl 1369.94469 IEEE Trans. Signal Process. 52, No. 1, 227-239 (2004). MSC: 94A40 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Xu, Zhengyuan; Wang, Xiaodong Large-sample performance of blind and group-blind multiuser detectors: a perturbation perspective. (English) Zbl 1315.94020 IEEE Trans. Inf. Theory 50, No. 10, 2389-2401 (2004). MSC: 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Krishnamurthy, Vikram; Wang, Xiaodong; Yin, George Spreading code optimization and adaptation in CDMA via discrete stochastic approximation. (English) Zbl 1297.94011 IEEE Trans. Inf. Theory 50, No. 9, 1927-1949 (2004). MSC: 94A13 90C15 93C55 93E03 94A05 × Cite Format Result Cite Review PDF Full Text: DOI
Li, Chuxiang; Wang, Xiaodong Performance comparisons of MIMO techniques with application to WCDMA systems. (English) Zbl 1068.94501 EURASIP J. Appl. Signal Process. 2004, No. 5, 649-661 (2004). MSC: 94A05 78A50 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Dong, Bin; Wang, Xiaodong; Doucet, Arnaud A new class of soft MIMO demodulation algorithms. (English) Zbl 1369.94389 IEEE Trans. Signal Process. 51, No. 11, 2752-2763 (2003). MSC: 94A14 × Cite Format Result Cite Review PDF Full Text: DOI
Berenguer, Inaki; Wang, Xiaodong Space-time coding and signal processing for MIMO communications. (English) Zbl 1058.94501 J. Comput. Sci. Technol. 18, No. 6, 689-702 (2003). MSC: 94A05 94A29 94A12 94A14 78A50 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Guo, Dong; Wang, Xiaodong; Chen, Rong Nonparametric adaptive detection in fading channels based on sequential Monte Carlo and Bayesian model averaging. (English) Zbl 1052.62001 Ann. Inst. Stat. Math. 55, No. 2, 423-436 (2003). MSC: 62B10 62G09 94A13 42C40 94A40 × Cite Format Result Cite Review PDF
Host-Madsen, A.; Wang, Xiaodong Performance of blind and group-blind multiuser detectors. (English) Zbl 1061.94523 IEEE Trans. Inf. Theory 48, No. 7, 1849-1872 (2002). MSC: 94A13 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Zhang, Junshan; Wang, Xiaodong Large-system performance analysis of blind and group-blind multiuser receivers. (English) Zbl 1062.94525 IEEE Trans. Inf. Theory 48, No. 9, 2507-2523 (2002). MSC: 94A12 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Reynolds, Daryl; Høst-Madsen, Anders; Wang, Xiaodong Adaptive transmitter precoding for time division duplex CDMA in fading multipath channels: Strategy and analysis. (English) Zbl 1066.94521 EURASIP J. Appl. Signal Process. 2002, No. 12, 1325-1334 (2002). MSC: 94A13 94A40 93E10 94A05 × Cite Format Result Cite Review PDF Full Text: DOI
Liu, Yan; Wang, Xiaodong Multiple-symbol decision-feedback space-time differential decoding in fading channels. (English) Zbl 1007.94008 EURASIP J. Appl. Signal Process. 2002, No. 3, 297-304 (2002). MSC: 94A14 94A40 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Wang, Xiaodong; Chen, Rong; Liu, Jun S. Monte Carlo Bayesian signal processing for wireless communications. (English) Zbl 1009.94002 J. VLSI Signal Process. Syst. Signal Image Video Technol. 30, No. 1-3, 89-105 (2002). Reviewer: Yuehua Wu (Toronto) MSC: 94A12 65C05 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Phan, Van Dao; Wang, Xiaodong Bayesian turbo multiuser detection for nonlinearly modulated CDMA. (English) Zbl 0989.94020 Signal Process. 82, No. 1, 43-68 (2002). MSC: 94A14 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Spasojević, Predrag; Wang, Xiaodong; Høst-Madsen, Anders Nonlinear group-blind multiuser detection. (English) Zbl 1014.94532 IEEE Trans. Commun. 49, No. 9, 1631-1641 (2001). MSC: 94A13 × Cite Format Result Cite Review PDF Full Text: DOI
Reynolds, Daryl; Wang, Xiaodong Adaptive group-blind multiuser detection based on a new subspace tracking algorithm. (English) Zbl 1009.94545 IEEE Trans. Commun. 49, No. 7, 1135-1141 (2001). MSC: 94A13 94A40 × Cite Format Result Cite Review PDF Full Text: DOI Link
Reynolds, D.; Wang, Xiadong Low-complexity Turbo-equalization for diversity channels. (English) Zbl 1098.94581 Signal Process. 81, No. 5, 989-995 (2001). MSC: 94A12 × Cite Format Result Cite Review PDF Full Text: DOI
Wang, Xiaodong; Poor, H. Vincent Subspace methods for blind joint channel estimation and multiuser detection in CDMA systems. (English) Zbl 1030.68887 Wireless Networks 6, No. 1, 59-71 (2000). MSC: 68U99 68M10 94A40 × Cite Format Result Cite Review PDF Full Text: DOI
Chen, Rong; Wang, Xiaodong; Liu, Jun S. Adaptive joint detection and decoding in flat-fading channels via mixture Kalman filtering. (English) Zbl 1001.94008 IEEE Trans. Inf. Theory 46, No. 6, 2079-2094 (2000). MSC: 94A13 93E11 94A40 94B35 65C05 94A14 × Cite Format Result Cite Review PDF Full Text: DOI Link