Abstract: An apparatus includes a modulator configured to modulate a plurality of data sequences, where individual ones of the plurality of data sequences correspond to individual ones of a plurality of user equipment; a transmitter configured for operation with a plurality of antennas and further configured to simultaneously transmit the modulated data sequences to the plurality of user equipment; and a receiver configured to receive one of an acknowledgment or a non-acknowledgment indication from individual ones of the plurality of user equipment indicating success or failure, respectively, of an individual one of the user equipment correctly receiving a corresponding transmitted data sequence.

Abstract: A cyclic shift of a reference signal is quantized as a combination of a cell specific cyclic shift with an outcome of a pseudo-random hopping, and an indication of the cell specific cyclic shift is broadcast in the cell. In one embodiment the cyclic shift is quantized as a modulo operation on a sum of the cell specific cyclic shift, the outcome of the pseudo-random hopping, and a user specific cyclic shift, in which case an indication of the user specific cyclic shift is sent in an uplink resource allocation and a user sends its cyclically shifted reference signal in the uplink resource allocated by the uplink resource allocation. The cyclic shift may also be quantized according to length of the reference signal as cyclic_shift_symbol=(cyclic_shift_value*length of the reference signal)/12; where cyclic_shift_value is between zero and eleven and cyclic_shift_symbol is the amount of cyclic shift given in reference signal symbols.

Abstract: In one exemplary embodiment, method including: receiving a first wireless communication with at least a first and second receiver utilizing a diversity method; and, in response to determining that simultaneous reception of a second wireless communication is desired, signaling that at least the second receiver is to be unavailable for the first communication. In another exemplary embodiment, method including: receiving a first wireless communication with at least a first receiver; receiving a second wireless communication with at least a second receiver; and in response to determining that reception of the second communication is to end, signaling that at least the second receiver is to be available for use. In another exemplary embodiment, method including: receiving, by a first apparatus, a timing of a second apparatus' periodic reception; and adjusting a transport format of a wireless communication sent from the first apparatus to the second apparatus based on the timing.

Abstract: The present invention relates to enhanced feedback in a multi-antenna transmission system, wherein an operation mode of a multi-antenna transmission end may be determined at a reception end of a connection, and a feedback information and a mode indicator may be generated based on the determined operation mode and transmitted to the multi-antenna transmission end where the feedback information may be interpreted based on the mode indicator.

Abstract: The invention is related to a data processing method comprising: selecting from at least one codebook a codebook and at least one weight in the codebook fulfilling a predetermined performance criterion, wherein one of the at least one codebook is of the form: [ ? 1 0 0.5 0.5 0.5 0 1 0.5 ? ? j ? ? 0 0.5 ? ? j ? ? 3 0.5 ? ? j ? 2 ? ? 3 ? ? ? ? 0.5 0.5 0.5 0.5 ? ? j ? ? ? 0.5 ? ? j ? 4 ? ? 3 0.5 ? ? j ? 5 ? ? 3 ] ; and informing the selected at least one codebook and weight to a transmitter for being used in transmission.

Abstract: Disclosed herein are apparatus, methods and computer program products for transmitting signals in different frequency sub-bands used in a particular cell of a cellular wireless communications system in accordance with a power sequence and for selecting modulation schemes to be used in transmitting the signals in the different frequency sub-bands in dependence on signal transmission power allocated to the sub-bands in the power sequence. In the power sequence, signals to be transmitted in at least one sub-band are allocated a higher signal transmission power level than signals to be transmitted in other sub-bands used in the particular cell of the cellular wireless communication system. The differing signal transmission power levels allocated to the different sub-bands typically results in different SINR for signals transmitted at the higher signal transmission power levels and signal transmitted at the lower signal transmission power levels.

Abstract: A method for operating a wireless communication system in a cell includes allocating a first plurality of pilot resources to a first frequency sub-band comprising a plurality of high power sub-carriers, allocating a second plurality of pilot resources to a second frequency sub-band comprising a plurality of low power sub-carriers, signaling a power offset between the plurality of pilot resources in the plurality of high power sub-carriers and the plurality of pilot resources in the plurality of low power sub-carriers, and transmitting the first and the second plurality of pilot resources over the first and the second frequency sub-bands.

Abstract: A method, device, computer program product, integrated circuit, and system are described to dispose pilot sequences (for aiding a receiver in estimating a channel) in a frame structure that has subframes of sub-carriers and symbol positions. Locations of common pilot sequences are predetermined, and includes 1) in each subframe, a pilot sequence is disposed in a first symbol position for each of at least two staggered sub-carriers, and 2) in at least one subframe, at least one pilot sequence is disposed in other than the first symbol position and in a sub-carrier other than any of the at least two staggered sub-carriers. Dedicated pilot sequences, whose locations in the frame are not predetermined, are disposed in response to an indication of channel quality received over a wireless link. Common pilot sequences may relate to one or two transmit antennas, and dedicated pilot sequences may enable addition of third and fourth transmit antennas.

Abstract: The present invention relates to a method and network device for identifying a cell portion to be selected from at least two cell portions each served by at least one respective remote head, wherein respective cell-portion specific amounts of delay are allocated to each of said at least two cell portions and signals received from said at least two cell portions are delayed by the cell-portion specific amounts of delay. Cell-portion specific signals can then be separated based on their time of occurrence. Thereby, a separation in the delay domain is possible during uplink reception in order to distinguish between different cell portions to which downlink signals can then be selectively transmitted. The downlink capacity can thus be increased without requiring increase of uplink capacity and complexity at the same time.

Abstract: The present invention relates to a method for determining transmit diversity order and branches for a transmitter having at least two transmit diversity branches. The transmit diversity branches for use are determined based on estimated channel properties of transmit diversity branches. A network element and a radio transmitter, where transmit diversity branches are determined using estimated channel properties, are also discussed.

Abstract: A method and apparatus for transmission polarization selection that includes receiving a signal from a device where the signal is received at two or three polarizations each polarization being orthogonal to each other. The polarization receiving the signal having the best performance characteristics is determined. Transmissions to the device are routed through appropriate transceivers and antennas such that they are transmitted using a polarization the same as that receiving the signal having the best performance characteristics. Performance characteristics measured may include highest power level, highest signal to noise ratio (SNR), highest carrier to interference ratio (CIR), highest signal to noise plus interference ratio (SNIR), lowest bit error ratio (BER), or lowest block error ratio (BLER).

Abstract: A beamforming method and device for adaptive antenna arrays including several antenna elements (1.1. to 1.M) in the downlink of frequency duplex systems, wherein antenna weights (Wk(fS)) are determined for the antenna elements (1.1 to 1.M) for downlink transmission on the basis of directional information of the uplink; in detail, the antenna weights (Wk(fS)) for downlink transmission are determined on the basis of the power angle spectrum (APSk) of the uplink of the individual users (B1 to BK), wherein the power angle spectrum (APSk) is modified by masking out undesired regions.