Vazquez-Vilar, G., D. Ramírez, R. López-Valcarce, J. Vía, and I. Santamaría. “Spatial Rank Estimation in Cognitive Radio Networks with Uncalibrated Multiple Antennas (Invited Paper).”https://doi.org/10.1145/2093256.2093291__In Proc. Int. Conf. on Cognitive Radio and Advanced Spectrum Management. Barcelona, Spain, 2011.https://doi.org/10.1145/2093256.2093291 .

Tong, Jun, Peter J. Schreier, Steven R. Weller, and Louis L. Scharf. “Linear Precoding for Time-Varying MIMO Channels with Low-Complexity Receivers.”https://doi.org/10.1109/ICASSP.2011.5946312__In Proc. IEEE Int. Conf. Acoustics, Speech and Signal Process., 3092–3095, 2011.https://doi.org/10.1109/ICASSP.2011.5946312 .

García-Naya, J. A., L. Castedo, D. Ramírez, and I. Santamaría. “Experimental Evaluation of Interference Alignment Under Imperfect Channel State Information.” In Proc. Eur. Signal Process. Conf. Barcelona, Spain, 2011.

Tong, Jun, Peter J. Schreier, and Steven R. Weller. “Precoder Design and Convergence Analysis of MIMO Systems with Krylov Subspace Receivers.”https://doi.org/10.1109/ISIT.2011.6034110__In Proc. IEEE Int. Symp. Inform. Theory, 2914–2918, 2011.https://doi.org/10.1109/ISIT.2011.6034110 .

Ramírez, D., G. Vazquez-Vilar, R. López-Valcarce, J. Vía, and I. Santamaría. “Detection of Rank-$P$ Signals in Cognitive Radio Networks with Uncalibrated Multiple Antennas.”https://doi.org/10.1109/TSP.2011.2146779__IEEE Trans. Signal Process. 59, no. 8 (2011): 3764–3774.https://doi.org/10.1109/TSP.2011.2146779 .

Gutiérrez, J., J. Pérez, D. Ramírez, L. Vielva, J. Ibáñez, and I. Santamaría. “Frequency-Domain Methodology for Measuring MIMO Channels Using a Generic Test Bed.”https://doi.org/10.1109/TIM.2010.2082432__IEEE Trans. Instrum. Meas. 60, no. 3 (2011): 827–838.https://doi.org/10.1109/TIM.2010.2082432 .

Ramírez, D., I. Santamaría, J. A. García-Naya, and L. Castedo. “Experimental Validation of Interference Alignment Techniques Using a Multiuser MIMO Testbed.”https://doi.org/10.1109/WSA.2011.5741921__In Proc. Int. ITG Work. on Smart Antennas. Aachen, Germany, 2011.https://doi.org/10.1109/WSA.2011.5741921 .

Wahlberg, Patrik, and Peter J. Schreier. “Locally Stationary Harmonizable Complex Improper Stochastic Processes.”https://doi.org/10.1111/j.1467-9892.2010.00682.x__J. Time Ser. Anal. 32, no. 1 (2011): 33–46.https://doi.org/10.1111/j.1467-9892.2010.00682.x .

Adali, Tülay, Peter J. Schreier, and Louis L. Scharf. “Complex-Valued Signal Processing: The Proper Way to Deal With Impropriety.”https://doi.org/10.1109/TSP.2011.2162954__IEEE Trans. Signal Process. 59, no. 11 (2011): 5101–5125.https://doi.org/10.1109/TSP.2011.2162954 .

Rüffer, B. S., and Fabian R. Wirth. “Stability Verification for Monotone Systems Using Homotopy Algorithms.”https://doi.org/10.1007/s11075-011-9468-3__Numer. Algorithms 58, no. 4 (2011): 529–543.https://doi.org/10.1007/s11075-011-9468-3 .

Vazquez-Vilar, G., D. Romero, R. López-Valcarce, D. Ramírez, J. Vía, I. Santamaría, and J. Sala. “Recent Advances in Multiantenna Spectrum Sensing: Complexity, Noise Uncertainty, and Signal Rank Issues.” In Int. Work. COST Action . Barcelona, Spain, 2011.

Ito, Hiroshi, Zhong-Ping Jiang, Sergey N. Dashkovskiy, and Björn S. Rüffer. “A Small-Gain Theorem and Construction of Sum-Type Lyapunov Functions for Networks of IISS Systems.” In Proc. IEEE American Contr. Conf., 1971–1977, 2011.

Regensburger, Alois, Christoph Bersch, Benjamin Hinrichs, Georgy Onishchukov, Andreas Schreiber, Christine Silberhorn, and Ulf Peschel. “Photon Propagation in a Discrete Fiber Network: An Interplay of Coherence and Losses.”https://doi.org/10.1103/physrevlett.107.233902__Physical Review Letters 107, no. 23 (2011).https://doi.org/10.1103/physrevlett.107.233902 .

Schreiber, A., K. N. Cassemiro, V. Potodek, A. Gábris, I. Jex, and Christine Silberhorn. “Decoherence and Disorder in Quantum Walks: From Ballistic Spread to Localization.”https://doi.org/10.1103/physrevlett.106.180403__Physical Review Letters 106, no. 18 (2011).https://doi.org/10.1103/physrevlett.106.180403 .

Laiho, K., A. Christ, K. N. Cassemiro, and Christine Silberhorn. “Testing Spectral Filters as Gaussian Quantum Optical Channels.”https://doi.org/10.1364/ol.36.001476__Optics Letters 36, no. 8 (2011).https://doi.org/10.1364/ol.36.001476 .

Söller, Christoph, Offir Cohen, Brian J. Smith, Ian A. Walmsley, and Christine Silberhorn. “High-Performance Single-Photon Generation with Commercial-Grade Optical Fiber.”https://doi.org/10.1103/physreva.83.031806__Physical Review A 83, no. 3 (2011).https://doi.org/10.1103/physreva.83.031806 .

Eckstein, Andreas, Andreas Christ, Peter J. Mosley, and Christine Silberhorn. “Realistic g            <sup>(2)</sup>            Measurement of a PDC Source with Single Photon Detectors in the Presence of Background.”https://doi.org/10.1002/pssc.201000876__Physica Status Solidi c 8, no. 4 (2011): 1216–19.https://doi.org/10.1002/pssc.201000876 .

Eckstein, Andreas, Andreas Christ, Peter J. Mosley, and Christine Silberhorn. “Highly Efficient Single-Pass Source of Pulsed Single-Mode Twin Beams of Light.”https://doi.org/10.1103/physrevlett.106.013603__Physical Review Letters 106, no. 1 (2011).https://doi.org/10.1103/physrevlett.106.013603 .

Christ, Andreas, Kaisa Laiho, Andreas Eckstein, Katiúscia N Cassemiro, and Christine Silberhorn. “Probing Multimode Squeezing with Correlation Functions.”https://doi.org/10.1088/1367-2630/13/3/033027__New Journal of Physics 13, no. 3 (2011).https://doi.org/10.1088/1367-2630/13/3/033027 .

Rohde, Peter P, Andreas Schreiber, Martin Stefaák, Igor Jex, and Christine Silberhorn. “Multi-Walker Discrete Time Quantum Walks on Arbitrary Graphs, Their Properties and Their Photonic Implementation.”https://doi.org/10.1088/1367-2630/13/1/013001__New Journal of Physics 13, no. 1 (2011).https://doi.org/10.1088/1367-2630/13/1/013001 .