Methods and apparatus for orthogonal stream spatial multiplexing. In one embodiment, a method includes splitting and modulating a data stream into n MIMO RF spatial streams and coupling them to corresponding switchable polarization antenna elements controlled via orthogonal binary codes for transmission. Each transmitted stream manifests as time-varying-polarization-orthogonal to the other n1 spatial streams. The method includes reception of the streams at their destination using corresponding antenna elements controlled by the same set of orthogonal codes. Thus, each of the n transmitted spatial streams is polarization-match-filtered, unambiguously separated and individually recovered from all the others upon reception for subsequent demodulation and MIMO spatial recombination into the original data stream. Thus, n MIMO spatial streams emanating from a common source and featuring equal amplitude and bandwidth but bearing distinct data and exhibiting mutually orthogonal time varying polarization will propagate mutually interference-free on the same frequency channel to a single destination.

Transceiver integrated circuit (IC) subarrays, each transceiver IC subarray comprising at least a first transceiver IC and a second transceiver IC physically arranged in a subarray: the transceiver ICs configured to process series of commonly-processed aggregated signal-port IQ data packets in accordance with (i) beam-tilt information received in control message packets and (ii) the subarray position of the transceiver ICs, using one or more signal processing techniques to achieve electronic beam tilt selected from the group consisting of: (i) applying an incremental phase rotation to each subcarrier frequency-domain IQ data point (via, e.g., and NCO), (ii) applying a constant phase rotation to each subcarrier frequency-domain IQ data point (e.g., via a complex multiplication), (iii) applying a constant phase rotation to each sample of the baseband time domain signal (e.g., via a complex multiplication), and (iv) imposing time delays in the discrete time domain signals of the transmit baseband signals.

Transceiver integrated circuit (IC) subarrays, each transceiver IC subarray comprising at least a first transceiver IC and a second transceiver IC physically arranged in a subarray: the transceiver ICs configured to process series of commonly-processed aggregated signal-port IQ data packets in accordance with (i) beam-tilt information received in control message packets and (ii) the subarray position of the transceiver ICs, using one or more signal processing techniques to achieve electronic beam tilt selected from the group consisting of: (i) applying an incremental phase rotation to each subcarrier frequency-domain IQ data point (via, e.g., and NCO), (ii) applying a constant phase rotation to each subcarrier frequency-domain IQ data point (e.g., via a complex multiplication), (iii) applying a constant phase rotation to each sample of the baseband time domain signal (e.g., via a complex multiplication), and (iv) imposing time delays in the discrete time domain signals of the transmit baseband signals.

Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a single CSI process is defined that is configured with an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

Methods and apparatus for orthogonal stream spatial multiplexing. In one embodiment, a method includes splitting and modulating a data stream into n MIMO RF spatial streams and coupling them to corresponding switchable polarization antenna elements controlled via orthogonal binary codes for transmission. Each transmitted stream manifests as time-varying-polarization-orthogonal to the other n1 spatial streams. The method includes reception of the streams at their destination using corresponding antenna elements controlled by the same set of orthogonal codes. Thus, each of the n transmitted spatial streams is polarization-match-filtered, unambiguously separated and individually recovered from all the others upon reception for subsequent demodulation and MIMO spatial recombination into the original data stream. Thus, n MIMO spatial streams emanating from a common source and featuring equal amplitude and bandwidth but bearing distinct data and exhibiting mutually orthogonal time varying polarization will propagate mutually interference-free on the same frequency channel to a single destination.

Methods and apparatus for orthogonal stream spatial multiplexing. In one embodiment, a method includes splitting and modulating a data stream into n MIMO RF spatial streams and coupling them to corresponding switchable polarization antenna elements controlled via orthogonal binary codes for transmission. Each transmitted stream manifests as time-varying-polarization-orthogonal to the other n1 spatial streams. The method includes reception of the streams at their destination using corresponding antenna elements controlled by the same set of orthogonal codes. Thus, each of the n transmitted spatial streams is polarization-match-filtered, unambiguously separated and individually recovered from all the others upon reception for subsequent demodulation and MIMO spatial recombination into the original data stream. Thus, n MIMO spatial streams emanating from a common source and featuring equal amplitude and bandwidth but bearing distinct data and exhibiting mutually orthogonal time varying polarization will propagate mutually interference-free on the same frequency channel to a single destination.

Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a single CSI process is defined that is configured with an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

Methods and apparatus for orthogonal stream spatial multiplexing. In one embodiment, a method includes splitting and modulating a data stream into n MIMO RF spatial streams and coupling them to corresponding switchable polarization antenna elements controlled via orthogonal binary codes for transmission. Each transmitted stream manifests as time-varying-polarization-orthogonal to the other n-1 spatial streams. The method includes reception of the streams at their destination using corresponding antenna elements controlled by the same set of orthogonal codes. Thus, each of the n transmitted spatial streams is polarization-match-filtered, unambiguously separated and individually recovered from all the others upon reception for subsequent demodulation and MIMO spatial recombination into the original data stream. Thus, n MIMO spatial streams emanating from a common source and featuring equal amplitude and bandwidth but bearing distinct data and exhibiting mutually orthogonal time varying polarization will propagate mutually interference-free on the same frequency channel to a single destination.

A device included in a communication system that includes a LoRa endpoint and a LoRa server. Each LoRa frame exchanged between the endpoint and the server has to pass through a meter and a data concentrator included in a first powerline communication network of a system for the automatic management of readings from meters. The meters are attached to at least one data concentrator via the first network. At least one of the meters implements a LoRa gateway that has a communication interface enabling it to exchange LoRa frames with the endpoint. The device is connected to each data concentrator by a second network and to the server by a third network. Each LoRa frame exchanged between the endpoint and the server (1) passes through the device and (2) is encapsulated in a frame according to a frame format that the server will exchange with a LoRa gateway.

Wireless communications systems and methods related to communicating a sequence-based signal in a frequency spectrum are provided. A first wireless communication device obtains a configuration for communicating a sequence-based signal in the frequency spectrum. The configuration indicates resources in a frequency spectrum and a frequency distribution mode of the resources. The first wireless communication device communicates the sequence-based signal with a second wireless communication device in the frequency spectrum based on the configuration. The sequence-based signal includes at least one of a physical uplink control channel (PUCCH) signal or a physical random access channel (PRACH) signal. The frequency distribution mode indicates at least one of a frequency interlaced structure, a frequency comb structure, or a frequency mini-interlaced structure.