A transmission device that performs multiple-input multiple-output (MIMO) transmission of transmit data using a plurality of fundamental bands. The transmission device includes an error correction coding unit, a mapping unit, and a MIMO coding unit. The error correction coding unit, for each data block of predefined length, performs error correction coding and thereby generates an error correction coded frame. The mapping unit maps each predefined number of bits in the error correction coded frame to a corresponding symbol and thereby generates an error correction coded block. The MIMO coding unit performs MIMO coding with respect to the error correction coded block. Components of data included in the error correction coded block are allocated to at least two of the fundamental bands and transmitted.

Provided is a receiver device that can switch between transmission methods, while minimizing increase in the number of blind decryption iterations and the amount of signaling needed for acknowledgement. In this device, a receiver part (201) receives a signal mapped to any of a plurality of mapping candidates; and according to application levels established for each of the plurality of mapping candidates, a control signal processor (205) performs blind decryption of the plurality of mapping candidates, employing either a first transmission method using a single antenna port to carry out precoding based on feedback information from the receiver device, or a second transmission method involving transmission diversity employing multiple antenna ports.

Transmit diversity schemes may be used for sending sequence-based signals over multiple antennas. For example, a user equipment (UE) may determine an uplink sequence to be transmitted to a base station using multiple antennas. The UE may utilize a transmit diversity scheme for the multiple-antenna transmission of the uplink sequence, where the transmit diversity scheme utilized may be based on a number of symbol periods during which the sequence is transmitted. In accordance with the transmit diversity scheme, the UE may use multiple transmit antennas to transmit different sequences from respective antennas. In other examples, the UE may transmit the uplink sequence using different time or frequency resources. Additionally, the UE may use some combination of different transmit diversity schemes for sequence-based signals. In some aspects, the base station may provide an indication of the transmit diversity scheme that the UE is to use for transmitting the uplink sequence.

The methods and apparatus disclosed herein processes reference signals in an antenna diversity system, e.g., where both the transmitting and receiving devices use multiple antennas The solution presented herein process reference signals at the transmitting device in such a way to enable the receiving device to efficiently and accurately estimate the covariance matrix associated with data transmitted using transmitter diversity. This is achieved by processing the reference signals used for the covariance estimation and the data signals in the same way, e.g., by precoding data and reference signal portions of one or more signals using the same coding scheme.

An apparatus includes feeds to form analog beams. The feeds are divided into panels. The apparatus includes processing circuitry that divides a target area for communications coverage into regions, including a first region and a second region neighboring each other. The processing circuitry generates, for the first region, a first plurality of analog beams, forming a first cluster. The processing circuitry generates, in the first cluster from the first plurality of analog beams, a first plurality of hybrid beams arranged in a first arrangement in the first cluster. The processing circuitry generates, for the second region, a second plurality of analog beams, forming a second cluster. The processing circuitry generates, in the second cluster from the second plurality of analog beams, a second plurality of hybrid beams arranged in a second arrangement that is adjacent to the first plurality of hybrid beams in the first arrangement.

A method of receiving a downlink channel, which is received by a user equipment from an eNB in a wireless communication system, is disclosed in the present specification. Specifically, the method includes the steps of receiving a downlink control channel for receiving a DM-RS (demodulation reference signal) based downlink data channel from the eNB, and receiving the DM-RS based downlink data channel using DM-RS configuration information included in the downlink control channel. In this case, if single-codeword transmission via the DM-RS based downlink data channel is indicated by the downlink control channel, the DM-RS based downlink data channel is received using a transmission diversity scheme. If two-codewords transmission via the DM-RS based downlink data channel is indicated by the downlink control channel, the DM-RS based downlink data channel is received using a spatial multiplexing scheme.

A transmission device that performs multiple-input multiple-output (MIMO) transmission of transmit data using a plurality of fundamental bands. The transmission device includes an error correction coding unit, a mapping unit, and a MIMO coding unit. The error correction coding unit, for each data block of predefined length, performs error correction coding and thereby generates an error correction coded frame. The mapping unit maps each predefined number of bits in the error correction coded frame to a corresponding symbol and thereby generates an error correction coded block. The MIMO coding unit performs MIMO coding with respect to the error correction coded block. Components of data included in the error correction coded block are allocated to at least two of the fundamental bands and transmitted.

Various embodiments are directed to systems, methods, and devices for concurrent high frequency down link air to ground communication transactions using multiple frequencies. A ground station radio device includes a transmitter to transmit uplink data to a plurality of aircraft over a first frequency, and a receiver to receive downlink data from the plurality of aircraft over a plurality of second frequencies that are different from the first frequency.

Provided is a receiver device that can switch between transmission methods, while minimizing increase in the number of blind decryption iterations and the amount of signaling needed for acknowledgement. In this device, a receiver part (201) receives a signal mapped to any of a plurality of mapping candidates; and according to application levels established for each of the plurality of mapping candidates, a control signal processor (205) performs blind decryption of the plurality of mapping candidates, employing either a first transmission method using a single antenna port to carry out precoding based on feedback information from the receiver device, or a second transmission method involving transmission diversity employing multiple antenna ports.

Spatial multiplexing and transmit diversity can improve the capacity of a wireless communication system. The system and method adapts communication schemes for communication systems with multiple antennas utilizing at least two transmission modes. The at least two transmission modes can, but are not necessarily, used for uplink communications. The two transmission modes may be chosen from the group consisting of a single antenna mode, a diversity mode a spatial multiplexed mode and a mixed diversity and spatial multiplexed mode. The at least two transmission modes may involve adaptation among multiple transmitters. At least one receiver may indicate a transmission mode to be used by a transmitter for a subsequent transmission. A transmitter may determine a transmission mode to be used for a subsequent transmission. The transmission mode can be based on channel sounding.