Abstract: In one respect, there is provided a method for analog-to-digital conversion. The method may include: receiving, at an analog-to-digital converter, an analog signal; determining, based on a total distortion caused by at least a sampler and an encoder, a sampling rate below the Nyquist rate and/or a quantization rate; and converting, by the analog-to-digital converter, the received analog signal to a digital signal by at least sampling at the determined sampling rate, when operation at the determined sampling rate does not worsen the total distortion. Related systems and articles of manufacture are also disclosed.

Abstract: Various embodiments provide for systems and methods of backhaul optimization. An exemplary system comprises a plurality of low power cells and a connector node. The connector node may be in communication with the plurality of low power cells. The connector node may be configured to receive demands from each of the plurality of low power cells. Each of the demands may indicate a demand at a predetermined time. The connector node may be further configured to determine a rate for each of the plurality of low power cells based on the demands of each of the low power cells and the assigned rate of the other of the plurality of low power cells. The connector node may be further configured to allocate capacity based on the determined rates.

Abstract: A method of managing Wi-Fi access points (APs) includes selecting between a global optimization and a local optimization of AP parameters based at least in part on one or more factors. The method includes causing a global optimization to be performed in the event that a global optimization is selected, the global optimization comprising: searching for adjustments to a first set of AP parameters that optimize an overall performance associated with a global region, the global region including a first set of APs. The method includes causing a local optimization to be performed in the event that a local optimization is selected, the local optimization comprising: searching for adjustments to a second set of AP parameters that optimize an overall performance associated with a localized region, the localized region including a second set of APs, wherein the second set of APs comprises a subset of the first set of APs.

Abstract: Methods and apparatuses, including computer program products, are provided for determining the null-space for a channel between a transmitter and an unintended receiver. In one aspect there is provided a method. The method may include transmitting, by a secondary transmitter, a plurality of learning signals, determining, for each of the plurality of learning signals, a value representative of an interference caused by the transmitting to an unintended receiver, determining, based on the determined values, a null-space for a channel between the secondary transmitter and the unintended receiver and transmitting, by the secondary transmitter, a signal in accordance with the determined null-space.

Abstract: A method of configuring small cell base stations in a cellular network is disclosed. A constraint on a performance-related metric associated with at least a portion of the cellular network is received. In some embodiments, the constraint on the performance-related metric comprises a constraint on a performance-related metric associated with one or more macrocells. Measurement data from one or more small cell base stations is received via a control interface. One or more optimized values of one or more parameters associated with one or more small cell base stations are searched. The searching is based at least in part on the received measurement data and subject to the constraint on the performance-related metric associated with the at least a portion of the cellular network. The one or more optimized values of the one or more parameters to the associated small cell base stations are transmitted.

Abstract: A method of configuring small cell base stations in a cellular network is disclosed. A constraint on a performance-related metric associated with at least a portion of the cellular network is received. In some embodiments, the constraint on the performance-related metric comprises a constraint on a performance-related metric associated with one or more macrocells. Measurement data from one or more small cell base stations is received via a control interface. One or more optimized values of one or more parameters associated with one or more small cell base stations are searched. The searching is based at least in part on the received measurement data and subject to the constraint on the performance-related metric associated with the at least a portion of the cellular network. The one or more optimized values of the one or more parameters to the associated small cell base stations are transmitted.

Abstract: A wireless spectrum is shared between a primary communication system and secondary communication system operating in an overlapping geographical region. A primary transmitter broadcasts a primary signal, and a secondary transmitter transmits a secondary signal, both using a primary wireless spectrum assigned to the primary communication system. The secondary transmitter transmits the secondary signal to a secondary receiver with power (1??)P and transmits the primary signal with power ?P. The parameter ? is computed to ensure a predetermined quality of reception of the primary signal by a hypothetical primary receiver located near the secondary transmitter. The secondary transmitter may compute a feasibility of using cognitive transmission and, when the computed feasibility exceeds or does not exceed a feasibility threshold, it selects to enable or disable, respectively, the use of the primary wireless spectrum to transmit from the secondary transmitter.

Abstract: A method of dynamically adjusting Wi-Fi parameters of a plurality of access points (APs) is disclosed. Reports from the plurality of APs are received through an interface. A conflict graph is created by a processor. Creating the conflict graph includes creating a plurality of vertices of the conflict graph, each vertex corresponding to one of the plurality of APs. Creating the conflict graph further includes determining that there is a conflict between at least some of the pairs of APs based at least in part on the received reports. Creating the conflict graph includes connecting an edge between each of the at least some of the pairs of APs. The conflict graph is stored in a memory.

Abstract: A method of managing Wi-Fi access points (APs) includes selecting between a global optimization and a local optimization of AP parameters based at least in part on one or more factors. The method includes causing a global optimization to be performed in the event that a global optimization is selected, the global optimization comprising: searching for adjustments to a first set of AP parameters that optimize an overall performance associated with a global region, the global region including a first set of APs. The method includes causing a local optimization to be performed in the event that a local optimization is selected, the local optimization comprising: searching for adjustments to a second set of AP parameters that optimize an overall performance associated with a localized region, the localized region including a second set of APs, wherein the second set of APs comprises a subset of the first set of APs.

Abstract: A method of configuring small cell base stations in a cellular network is disclosed. A constraint on a performance-related metric associated with at least a portion of the cellular network is received. In some embodiments, the constraint on the performance-related metric comprises a constraint on a performance-related metric associated with one or more macrocells. Measurement data from one or more small cell base stations is received via a control interface. One or more optimized values of one or more parameters associated with one or more small cell base stations are searched. The searching is based at least in part on the received measurement data and subject to the constraint on the performance-related metric associated with the at least a portion of the cellular network. The one or more optimized values of the one or more parameters to the associated small cell base stations are transmitted.

Abstract: A method of dynamically adjusting Wi-Fi parameters of a plurality of access points (APs) is disclosed. Reports from the plurality of APs are received through an interface. A conflict graph is created by a processor. Creating the conflict graph includes creating a plurality of vertices of the conflict graph, each vertex corresponding to one of the plurality of APs. Creating the conflict graph further includes determining that there is a conflict between at least some of the pairs of APs based at least in part on the received reports. Creating the conflict graph includes connecting an edge between each of the at least some of the pairs of APs. The conflict graph is stored in a memory.

Abstract: A method of detecting a hidden node is disclosed. Reports from a plurality of access points (APs) are received. The method includes determining that transmissions from a second AP are not detected by a first AP based on the received report from the first AP. The method includes determining that transmissions from a client associated with the first AP are detected by the second AP based on the received report from the second AP. The method further includes detecting that the second AP is a hidden node, wherein transmissions from the hidden node interfere with transmissions between the client and the first AP, and wherein the detection is based at least in part on the determination that transmissions from the second AP are not detected by the first AP and the determination that transmissions from the client associated with the first AP are detected by the second AP.

Abstract: A method of managing Wi-Fi access points (APs) includes selecting between a global optimization and a local optimization of AP parameters based at least in part on one or more factors. The method includes causing a global optimization to be performed in the event that a global optimization is selected, the global optimization comprising: searching for adjustments to a first set of AP parameters that optimize an overall performance associated with a global region, the global region including a first set of APs. The method includes causing a local optimization to be performed in the event that a local optimization is selected, the local optimization comprising: searching for adjustments to a second set of AP parameters that optimize an overall performance associated with a localized region, the localized region including a second set of APs, wherein the second set of APs comprises a subset of the first set of APs.

Abstract: A method of configuring small cell base stations in a cellular network is disclosed. A constraint on a performance-related metric associated with at least a portion of the cellular network is received. In some embodiments, the constraint on the performance-related metric comprises a constraint on a performance-related metric associated with one or more macrocells. Measurement data from one or more small cell base stations is received via a control interface. One or more optimized values of one or more parameters associated with one or more small cell base stations are searched. The searching is based at least in part on the received measurement data and subject to the constraint on the performance-related metric associated with the at least a portion of the cellular network. The one or more optimized values of the one or more parameters to the associated small cell base stations are transmitted.

Abstract: Gene expression analysis is generally performed on heterogeneous tissue samples consisting of multiple cell types. Current methods developed to separate heterogeneous gene expression rely on prior knowledge of the cell-type composition and/or signatures—these are not available in most public datasets. We present a novel method to identify the cell-type composition, signatures and proportions per sample without need for a priori information. The method was successfully tested on controlled and semi-controlled datasets and performed as accurately as current methods that do require additional information. As such, this method enables the analysis of cell-type specific gene expression using existing large pools of publically available microarray datasets.

Abstract: Interference cognitive devices are described. An interference cognitive device can be collocated with a transmitter of an interference cognitive transmitter (ICT), as receive chains or portions thereof at the ICT. An interference cognitive device can also be remote with respect to the transmitter, which operates in an interference cognitive network and receives data directly or indirectly from the interference cognitive device. The ICT uses the data to mitigate interference while continuing to operate in accordance with a performance metric.

Abstract: Various embodiments provide for systems and methods of backhaul optimization. An exemplary system comprises a plurality of low power cells and a connector node. The connector node may be in communication with the plurality of low power cells. The connector node may be configured to receive demands from each of the plurality of low power cells. Each of the demands may indicate a demand at a predetermined time. The connector node may be further configured to determine a rate for each of the plurality of low power cells based on the demands of each of the low power cells and the assigned rate of the other of the plurality of low power cells. The connector node may be further configured to allocate capacity based on the determined rates.

Abstract: A method of managing heterogeneous wireless devices in three or more different types of networks is disclosed. Each type of network uses a different type of radio access technology. The method includes receiving measurement data from a plurality of heterogeneous wireless devices via a control interface, wherein a heterogeneous wireless device provides connections to client devices via one or more of the three or more radio access technologies. The method includes searching, using a processor, for optimized adjustments to one or more parameters associated with one or more of the plurality of heterogeneous wireless devices based at least in part on a set of network optimization goals and the measurement data received from the plurality of heterogeneous wireless devices. The method includes transmitting at least some of the optimized adjustments of the one or more parameters to the one or more of the plurality of heterogeneous wireless devices.

Abstract: A method of offloading data from an IP-based cellular network to a Wi-Fi network is disclosed. A request from a user equipment (UE) to connect to a Wi-Fi network is received. It is determined whether the UE is a subscriber to a cellular network. It is determined whether to offload data from the cellular network to the Wi-Fi network. The determination is based at least in part on a set of offload criteria. A Home IP Address is obtained, wherein the Home IP Address comprises a mobile IP address corresponding to the UE assigned by the cellular network. The Home IP Address is allocated to the UE as the UE's IP address for communicating with the UE on the Wi-Fi network. Data is offloaded from the cellular network to the Wi-Fi network.

Abstract: Methods and apparatus, including computer program products, are provided for energy efficient communication based on feedback. A method may include sending a first message carried by a first wireless radio channel at a first predetermined energy level; receiving, in response to the first message, a second message carried by a second wireless radio channel; comparing the first message to the second message; sending a termination message, when the comparing indicates the first message and the second message match; and sending a portion of the first message at a second predetermined energy level, when the comparing indicates the second message contains at least one error when compared to the first message.