A communications system having two terminals, each including two antennas, the communications system using spatial multiplexing. One antenna of a first terminal transmits a tracking tone along with a data signal. Two antennas in a second terminal receive the tracking tone. The signals from the two antennas are processed by a feed circuit. The feed circuit includes a variable delay circuit and a combiner that forms, at a first difference output, a linear combination, of a signal from the first antenna and a signal from the second antenna, in which the tracking tone is canceled. The variable delay circuit is actively adjusted to maintain this cancellation.

Methods, apparatuses, systems, devices, and computer program products directed to phase-continuous frequency selective precoding are provided. Included among these classes are methods for use in connection with dynamic precoding resource block group (PRG) configuration and with codebook based transmission configuration. A representative of such methods may include any of receiving signaling indicating transmit precoding information; determining a candidate PRG size using any of the transmit precoding information, a rule for determining a PRG size and configured PRG sizes; and configuring or reconfiguring a wireless transmit/receive device in accordance with the candidate PRG size. Another of the representative methods may include reporting a transmission coherence capability of a wireless transmit/receive unit; receiving a codebook subset restriction (CBSR) commensurate with the transmission coherence capability; determining a transmit precoding matrix indices (TPMI) size based on the CBSR; receiving a TPMI; and detecting or decoding the TPMI based on the determined TPMI size.

Various embodiments comprise systems, methods, architectures, mechanisms and apparatus for spatially combining a plurality of 5G new radio (NR) carrier signals or channels for transport via a common frequency channel through a hybrid fiber coax (HFC) or other communications medium link or network. To overcome a loss of receiver ability to discriminate/process individual spatial components, each baseband signal and/or carrier signal including a spatial component has imparted to it a respective channel component n configured to modify amplitude, phase shift, and/or time delay of the baseband signal and/or carrier signal such that multiple spatial component bearing signals stacked/combined within a HFC frequency channel or slot include channel characteristics sufficiently distinct so as to enable a receiver to identify, discriminate, and otherwise process desired spatial components.

Provided is a communication device including a plurality of antenna elements and that performs wireless communication in a high frequency band while suppressing the circuit scale. The communication device includes: a communication unit that transmits and receives a wireless signal using a plurality of antenna elements; and a control unit that controls compensation for degradation in communication quality in the communication unit on the basis of control information received from outside. The communication unit includes a plurality of wireless interfaces and a delay compensation unit that compensates for delay of the wireless interfaces. The control unit determines whether or not to perform the compensation on the basis of capability information exchanged with a communication partner.

In an example method, a user equipment (UE) device determines one or more component carriers available to the UE device for at least one of transmitting or receiving data over a wireless network. The UE device transmits, to the wireless network, for each component carrier, an indication whether the component carrier supports at least one of transmitting or receiving data according to a multi-transmission and receiving points (multi-TRP) communication protocol.

A multi-input multi-output (MIMO) system considers either reliability for each antenna or a time/frequency location, and transmits a signal at an unequal ratio for each antenna according to the consideration result. The method for use in the MIMO system including multiple antennas includes processing a signal according to an unequal ratio transmission scheme employing the multiple antennas at an unequal ratio, and transmitting the processed signal via the multiple antennas.

A control channel of a communication method and an apparatus includes at least one timeslot, and the method includes: obtaining, according to a first data symbol sequence to be transmitted in a timeslot and coefficients a(i) and d(i), a second data symbol sequence and a third data symbol sequence, where, in a(i)+d(i), at least one pair of a(u)+d(u) and a(v)+d(v) have moduli unequal to each other; and using the same extension sequence [w(0), w(1), . . . , w(N1)] to process the second data symbol sequence and the third data symbol sequence, mapping the processed data respectively onto the same time-frequency resources corresponding to a first antenna array and a second antenna array, and transmitting the data, where i, u, and v are integers, 0iM1, and uv.

A method for wireless communication is provided which includes receiving first and second signals transmitted from first and second antennas, respectively, determining a time offset between the first and second antennas based on the first and second signals, and reporting information regarding the time offset, including information regarding the time offset as being above or below a predetermined threshold. Another method for wireless communication is provided which includes generating channel state information feedback based on an assumption that the time offset is being compensated at a transmitter side. Yet another method for wireless communication is provided which includes receiving information regarding a time offset between multiple transmit antennas, including information regarding the time offset as being above or below a predetermined threshold, and adapting downlink transmissions to account for the time offset.

Methods and apparatus for interference coordination to improve transmission and reception performance within wireless networks. In one exemplary embodiment, a wireless transmitter transmits multiple transmissions over a determined time. The receiver receives the multiple transmissions and attempts to recover the transmitted signal. Because, the fading channel varies over time for each transmitter-receiver, by combining the received signals over multiple iterations, the signal of interest will be magnified, whereas interference effects will be suppressed.

Embodiments are directed to operating an analog signal processing circuit to emulate a Rotman lens. The analog signal processing circuit applies a plurality of time delays to a plurality of signals associated with a plurality of beam ports. The analog signal processing circuit forms a plurality of output beams for transmission by a plurality of array ports included in an array based on the time delayed signals by summing the time delayed signals. The time delays are based on a direction of transmission of the output beams.