A beam former module includes a package base and an interconnect structure formed within the package base. The beam former module also includes a first true time delay (TTD) module attached to the package base. The first TTD module includes a plurality of switching elements configured to define a signal transmission path between a signal input and a signal output of the first TTD module by selectively activating a plurality of time delay lines. The signal input and the signal output of the first TTD module are electrically coupled to the interconnect structure. In some embodiments, the interconnect structure includes at least one TTD meander line and at least one of the time delay lines of the first TTD module is electrically coupled to the at least one TTD meander line.

Disclosed are a method for transmitting or receiving channel state information in a wireless communication system and a device therefor. Specifically, a method for transmitting channel state information (CSI) by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, the number of antenna ports specific to one or more channel state information-reference signal (CSI-RS) resources; receiving, by the terminal, a CSI-RS on the one or more antenna ports from the base station; when the number of one or more CSI-RS resource-specific antenna ports configured in the terminal is different from the number of antenna ports in reporting units of the CSI configured in the terminal, estimating a CSI-RS antenna port on the basis of the number of antenna ports in reporting units of the CSI configured in the terminal, and deriving the CSI on the basis of the CSI-RS; and reporting the CSI to the base station.

Various embodiments of signal shaping systems are disclosed. In some embodiments, a signal shaping system comprises an input configured to receive an input signal. The input signal is transmitted as an optic signal. The signal shaping system comprises a first delay module to generate a first delay signal with a first delay compared to the input signal and a second delay module to generate a second delay signal with a second delay compared to the first delay signal. An inverter is configured to invert the first delay signal to generate an inverted first delay signal. A signal addition operation module is configured to add the inverted first delay signal and the second delay signal together and create a first pulse with a duration of the second delay and a second pulse with a duration of the second delay. An amplifier is configured to cut off the first pulse and amplify the second pulse. A bias loop module is configured to keep the amplifier near a cutoff region.

A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code.

Spatial redistributors and methods of redistributing signals in accordance with various embodiments of the invention are illustrated. One embodiment includes an array of channels configured to receive and retransmit a signal, where each of a plurality of independently operating channels in the array includes: at least one antenna element; an RF chain configured to apply at least a time delay to the received signal prior to retransmission; control circuitry configured to control the time delay applied to the received signal by the RF chain; and a reference oscillator. In addition, the array of channels is configured to redirect a signal received from a first set of directions for retransmission in a second set of directions; and the control circuitry of the channels in the array of channels coordinates the time delays applied to the received signal across the array of channels to control the wave front of the retransmitted signal.

Apparatuses, methods, and systems for simultaneous communication through multiple beams of a wireless node, are disclosed. One apparatus includes a node, that includes a beamforming network, an antenna array, and a controller. The beamforming network operates to receive a plurality of communication signals and generate a plurality of delayed signals. The antenna array generates an antenna pattern that includes a plurality of beams, wherein the plurality of beams is divided into a plurality of groups. The controller operates to control simultaneous communication of the node with a plurality of transceivers, including the node communicating with a first transceiver through a selected beam of a first group of beams and simultaneously the node communicating with another transceiver through a corresponding beam of another group of beams.

The described techniques relate to improved methods, systems, devices, or apparatuses that support channel state information feedback for semi-open-loop and open-loop schemes. The described techniques provide for a user equipment (UE) to determine an open-loop, semi-open-loop, or closed-loop transmission scheme for deriving channel quality information (CQI). In the case of determined open-loop transmission scheme, the UE may select a transmission scheme corresponding to a time offset value and a precoder cycling granularity value. The UE may determine one or more of a time offset value, a precoder cycling granularity value, and a precoding matrix indicator (PMI) for a channel state information (CSI) report, and generate CQI accordingly. Additionally, the UE may include the determined values in the CSI report to indicate the transmission scheme used for the CQI derivation. Based on the CQI, the base station can then determine the transmission scheme and perform link adaption accordingly.

A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

Apparatuses, methods, and systems for beamforming using tunable passive time-delay structures are disclosed. One apparatus includes a node, wherein the node includes a passive time-delay structure, wherein the passive time-delay structure is operative to generate a plurality of delayed signals, wherein each of the plurality of delayed signals is a delayed version of a communication signal, a tunable element, the tunable element operative to introduce a variable delay to the communication signal propagating through the passive time-delay structure, an antenna array, wherein the antenna array generates a beamforming pattern corresponding the passive time-delay structure, and a phase delay adjust control operative to adjust the tunable element of the passive time-delay structure, wherein a direction of the one or more beams of the beamforming pattern changes depending upon tuning of the tunable element.

Provided are a method for decoding a V2X signal transmitted by means of a transmit diversity method in a wireless communication system, and a terminal for applying same. The method comprises: determining a first CS index of a first DM-RS associated with a first antenna port on the basis of a CRC of sidelink control information (SCI) received via a PSCCH; determining a second CS index of a second DM-RS associated with a second antenna port on the basis of reserved bits of the SCI; and on the basis of the first DM-RS having the first CS index applied thereto, and the second DM-RS having the second CS index applied thereto, decoding a V2X signal transmitted via the first antenna port and the second antenna port.