Abstract: Apparatuses, methods, and systems for surveying a site are disclosed. One method includes transmitting, by a ground unit, wireless signals while a directionally adjustable beam-forming antenna of the ground unit changes a beam direction of the transmission of the wireless signals to N beam directions, wherein the directionally adjustable beam-forming antenna includes a known motion, receiving and measuring, by an elevated unit, a magnitude and phase of the wireless signals transmitted by the ground unit through the N beam directions, determining N complex receive power representations wherein each complex receive power representation includes the measured magnitude and phase of the received wireless signals corresponding with each of the N beam directions, and determining a receive power summation comprising performing a complex summation of the N complex receive power representations.

Abstract: A New Radio (NR) system and a method for transmitting sounding reference signals in a new radio communications system is provided that enables mutual orthogonality to be maintained between SRS resources of different UEs. The system an eNodeB and a plurality of UEs, and the method includes: generating, at a UE, a base sequence based upon a sequence number received from the eNodeB; generating a plurality of blocks from the base sequence by applying cyclic-shifts to the base sequence; and generating a sounding reference signal by concatenating the cyclically shifted blocks. The sounding reference signal is then transmitted to the eNodeB. By using the same Zadoff-Chu base sequence with different cyclic shifts among overlapped UEs, mutual orthogonality of the SRS of each UE is maintained.

Abstract: A method of scheduling transmission in a MIMO system is provided that includes joint UE and rank selection. The method comprises selecting, at a base station, a UE of a plurality of candidate UEs and a MIMO rank for the selected UE according to an inter-UE interference between the selected UE at the MIMO rank and one or more scheduled UEs. The selected UE is then scheduled for transmission, at the MIMO rank, with the scheduled UEs.

Abstract: A MIMO system (100) and a method of generating a precoder for use in a MIMO system (100), when communicating with a UE (115), are provided. The method comprises receiving, from the UE (115), channel information relating to a channel on which data is transmitted; decomposing the channel information into components representing a transmission component and a signal strength component; and generating the precoder according to the transmission component and the signal strength component.

Abstract: A method and system for data communication in a Multi-user Multiple-Input and Multiple-Output (MU-MIMO) system is provided. The method includes receiving, from a first UE of the plurality of UEs, first and second channel information relating to first and second subsets of antennae; generating first and second sub-precoders according to the first and second channel information; generating a precoder according at least in part to the first and second sub-precoders; and transmitting data to the first UE using the precoder.

Abstract: A system includes an eNB which is operable to communicate with one or UEs and a set of multiple transmit antennas associated with the eNB. The antennas are partitioned into multiple antenna subsets. In a first form of the method, one of the antennas is designated as a reference antenna and the reference antenna forms part of each antenna subset. In a second form of the method, one of the subsets is designated as a reference subset. The UE(s) are operable to compute multiple PMIs for the respective multiple subsets and to report the multiple PMIs to the eNB for the eNB to use in precoding. The first form involves computing a PMI for a given antenna subset independently of the PMIs of any of the other antenna subsets. The second form involves computing a PMI for a given subset based on or using the PMI for the reference subset.

Abstract: A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.

Abstract: A method and transmitting device are provided for coordinated multi-point transmission scheduling by a transmitting device over one or more heterogeneous wireless networks that include a set of clusters. Each of the clusters has a set of transmission points for serving a set of user equipment devices. The method includes determining constraints imposed on any of the user equipment devices. The method further includes receiving channel state information feedback from the user equipment devices. The method also includes obtaining user weights and buffer sizes. The method additionally includes iteratively determining a weighted sum of user rates based on the constraints, the channel state information feedback, the user weights, and the buffer sizes. The iteratively determining step determines the weighted sum of user rates based on an initial weighted sum of user rates determined for the user equipment devices without the constraints.

Abstract: A method for computing precoder matrix indicators (PMIs) in a wireless communication system is disclosed. The wireless communication system includes a base station (eNB) which is operable to communicate with one or more user equipments (UEs), and a set of transmit antennas associated with the eNB that have been partitioned into multiple antenna subsets. The UE(s) are operable to compute and report multiple PMIs for the said multiple antenna subsets to the eNB for the eNB to use in precoding. The method comprises computing a PMI for a given antenna subset using other already-computed PMI(s) for other(s) of the antenna subsets, such that the PMIs reported by the UE to the eNB account for correlation between the antenna subsets.

Abstract: There is provided generating precoders for joint transmission (JT) in a downlink coordinated multi-point transmission/reception (DL COMP) wireless communications system. The system includes a plurality of transmission points (TPs) operable to communicate with a plurality of user equipments (UEs). Each UE has one of the TPs as its serving TP. The method includes transmitting channel state information (CSI) from each UE to its serving TP, wherein the transmitted CSI includes precoder matrix indicators (PMI), and using the PMI to generate precoders for transmission of data from the plurality of TPs to the plurality of UEs.

Abstract: A MIMO system (100) and a method of generating a precoder for use in a MIMO system (100), when communicating with a UE (115), are provided. The method comprises receiving, from the UE (115), channel information relating to a channel on which data is transmitted; decomposing the channel information into components representing a transmission component and a signal strength component; and generating the precoder according to the transmission component and the signal strength component.

Abstract: A method for computing precoder matrix indicators (PMIs) in a wireless communication system is disclosed. The wireless communication system includes a base station (eNB) which is operable to communicate with one or more user equipments (UEs), and a set of transmit antennas associated with the eNB that have been partitioned into multiple antenna subsets. The UE(s) are operable to compute and report multiple PMIs for the said multiple antenna subsets to the eNB for the eNB to use in precoding. The method comprises computing a PMI for a given antenna subset using other already-computed PMI(s) for other(s) of the antenna subsets, such that the PMIs reported by the UE to the eNB account for correlation between the antenna subsets.

Abstract: A method and system for data communication in a Multi-user Multiple-Input and Multiple-Output (MU-MIMO) system is provided. The method includes receiving, from a first UE of the plurality of UEs, first and second channel information relating to first and second subsets of antennae; generating first and second sub-precoders according to the first and second channel information; generating a precoder according at least in part to the first and second sub-precoders; and transmitting data to the first UE using the precoder.

Abstract: A system includes an eNB which is operable to communicate with one or UEs and a set of multiple transmit antennas associated with the eNB. The antennas are partitioned into multiple antenna subsets. In a first form of the method, one of the antennas is designated as a reference antenna and the reference antenna forms part of each antenna subset. In a second form of the method, one of the subsets is designated as a reference subset. The UE(s) are operable to compute multiple PMIs for the respective multiple subsets and to report the multiple PMIs to the eNB for the eNB to use in precoding. The first form involves computing a PMI for a given antenna subset independently of the PMIs of any of the other antenna subsets. The second form involves computing a PMI for a given subset based on or using the PMI for the reference subset.

Abstract: A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.

Abstract: A method according to the present invention is for selecting User Equipment (UE) for scheduling/precoding within the coverage area of a communications node having a predefined codebook. The method includes: receiving at the communications node feedback information from each of the UEs within the coverage area of the communications node wherein the feedback information includes at least one precoder matrix indicator (PMI); generating at the communications node a precoder matrix based on the reported precoder matrix indicator from each UE; determining at the communications node correlation values for each UE in the coverage utilizing the precoder matrix; identifying a pair of UEs having minimum correlation values; and selecting the identified UEs for scheduling/precoding if the minimum correlation value is less than or equal to a threshold value.

Abstract: A method and transmitting device are provided for coordinated multi-point transmission scheduling by a transmitting device over one or more heterogeneous wireless networks that include a set of clusters. Each of the clusters has a set of transmission points for serving a set of user equipment devices. The method includes determining constraints imposed on any of the user equipment devices. The method further includes receiving channel state information feedback from the user equipment devices. The method also includes obtaining user weights and buffer sizes. The method additionally includes iteratively determining a weighted sum of user rates based on the constraints, the channel state information feedback, the user weights, and the buffer sizes. The iteratively determining step determines the weighted sum of user rates based on an initial weighted sum of user rates determined for the user equipment devices without the constraints.

Abstract: There is provided generating precoders for joint transmission (JT) in a downlink coordinated multi-point transmission/reception (DL COMP) wireless communications system. The system includes a plurality of transmission points (TPs) operable to communicate with a plurality of user equipments (UEs). Each UE has one of the TPs as its serving TP. The method includes transmitting channel state information (CSI) from each UE to its serving TP, wherein the transmitted CSI includes precoder matrix indicators (PMI), and using the PMI to generate precoders for transmission of data from the plurality of TPs to the plurality of UEs.

Abstract: This method of generating precoders is used in optimising transmission capacity between an eNodeB and UEs in a DL MU-MIMO communication system. The method includes the steps of computing correlation values between pairs of precoding matrices (PMs) of the reported precoding matrix indicators (PMIs) (step 40), selecting a PM pair having a minimum correlation value (step 42). If the minimum correlation value is less than a lower threshold Tmin, the method uses a PM corresponding to the received PMI (step 44). If the minimum correlation value is greater than Tmin and less than an upper threshold Tmax, the method includes the steps of computing correlation values of the reported PMI and Channel Matrices (CMs) from a fixed codebook of representative CMs (step 48), selecting a CM pair having a maximum correlation value (step 52), and computing precoders from the selected CM pair (step 54).

Abstract: A method according to the present invention is for selecting User Equipment (UE) for scheduling/precoding within the coverage area of a communications node having a predefined codebook. The method includes: receiving at the communications node feedback information from each of the UEs within the coverage area of the communications node wherein the feedback information includes at least one precoder matrix indicator (PMI); generating at the communications node a precoder matrix based on the reported precoder matrix indicator from each UE; determining at the communications node correlation values for each UE in the coverage utilising the precoder matrix; identifying a pair of UEs having minimum correlation values; and selecting the identified UEs for scheduling/precoding if the minimum correlation value is less than or equal to a threshold value.