Abstract: An Orthogonal Frequency-Division Multiplexing digital radio transmitter is arranged to transmit a data packet comprising a plurality of Orthogonal Frequency-Division Multiplexing symbols. At least one of the symbols comprises a plurality of demodulation reference signals in a first plurality of frequency sub-carriers of the symbol. The transmitter is arranged to transmit a physical control channel at least partly distributed among a remainder of frequency sub-carriers of the symbol according to a calculated distribution. The transmitter calculates the distribution by arranging the remainder of frequency sub-carriers in a two-dimensional matrix such that said remainder of frequency sub-carriers have indices which are sequential in a first dimension and have a common increment in a second dimension, and allocating a second plurality of the remainder of frequency sub-carriers to the physical control channel sequentially in the second direction.

Abstract: In a non-limiting and example embodiment, a method is provided for facilitating direction calculation, comprising: detecting, by an apparatus at least one indication frame from another apparatus, determining properties associated with transmission of at least one subsequent frame from the another apparatus on the basis of the at least one indication frame, and gathering measurement information for direction calculation on the basis of the determined properties and the at least one subsequent frame from the another apparatus.

Abstract: An apparatus for solving a function, such as a mathematical function, may be configured to minimize cost indicators associated with solving the function. Embodiments may be used to compute, in a fast and efficient way, the results of a given mathematical function f(x) and to execute the required operations on the best possible computational elements available within the target platform. Embodiments may exploit a mixture of calculation/evaluation methods that can be implemented on each computational element of the platform in order to approximate the desired function within the desired degree of accuracy and at a low computational cost. Associated methods and computer program products may also be provided.

Abstract: A shared uplink acknowledgment (ACK) channel can be communicated to the payload recipient. The shared uplink ACK channel information can be communicated in the payload message or in a broadcast control channel. Reserving a dedicated time-frequency chunk for these short ACK messages and multiplexing different users to the same time slot with spreading codes having good cross-correlation properties can be used to accomplish such a shared uplink ACK channel.

Abstract: A flexible transmission resource reservation scheme and data transmission scheme is provided for a wireless network. A source node transmits a data transfer reservation request for a transmission resource to at least one neighboring node including at least one target node of the wireless network. The source node may have data to be transmitted or may anticipate data reception from at least one of the target nodes. Then, the source node receives from the at least one neighboring node an acknowledgment to reserve the requested transmission resource for data transfer between the source node and the at least one target node. Thereafter, data is transferred between the source node and the at least one target node within the reserved transmission resource.

Abstract: An apparatus for identifying techniques for solving functions may include a processor. The processor may be configured to identify a function and identify candidate techniques for solving the function. The processor may also be configured to separate a domain of the function into a plurality of domain intervals and determine respective cost indicators for each candidate technique as applied to each domain interval of the function. Further, the processor may be configured to select a technique for each domain interval based on the cost indicators; and provide for configuring an application processor to solve the function via the selected techniques and the respective domain intervals. Associated methods and computer program products may also be provided.

Abstract: An approach is provided for resource allocation within a network. A request is generated for resource allocation from a neighboring node within a network. The request is inserted in a beaconing subframe of a transmission frame. The transmission frame includes a reservation subframe that provides acknowledgement signaling relating to a grant of the resource allocation.

Abstract: A system and method for a hierarchical network operating mode in an ad hoc wireless communications network. In one embodiment, a communications node includes a controller and a transceiver. The controller is configured to create a bandwidth allocation request for other communications nodes in an ad hoc wireless communications network. The transceiver is configured to receive request grants from the other communications nodes granting the bandwidth allocations in accordance with the bandwidth allocation request, thereby establishing a hierarchical network operating mode in at least a portion of the ad hoc wireless communications network.

Abstract: A flexible transmission resource reservation scheme and data transmission scheme is provided for a wireless network. A source node transmits a data transfer reservation request for a transmission resource to at least one neighboring node including at least one target node of the wireless network. The source node may have data to be transmitted or may anticipate data reception from at least one of the target nodes. Then, the source node receives from the at least one neighboring node an acknowledgment to reserve the requested transmission resource for data transfer between the source node and the at least one target node. Thereafter, data is transferred between the source node and the at least one target node within the reserved transmission resource.

Abstract: There is provided a method comprising: providing two transmission bands for simultaneous communication of signals by a plurality of mesh nodes of a mesh network; dividing both of the transmission bands into at least three subchannel regions, each subchannel region including a subset of available logical subchannels of a multiple access technology; and allocating at least four subchannel regions of the transmission bands to each mesh node of the plurality of mesh nodes for use in transmission and reception, wherein the transmission and reception of a mesh node are allocated to subchannel regions of different transmission bands.

Abstract: A shared uplink acknowledgment (ACK) channel can be communicated to the payload recipient. The shared uplink ACK channel information can be communicated in the payload message or in a broadcast control channel. Reserving a dedicated time-frequency chunk for these short ACK messages and multiplexing different users to the same time slot with spreading codes having good cross-correlation properties can be used to accomplish such a shared uplink ACK channel.

Abstract: A synchroniser for use in a receiver which receives signals, wherein the synchronizer provides a digital control signal, the control signal defining a plurality of different levels; controls the level provided by successive ones of the control signals, successive ones of the control signal defining different values; and estimates the difference between the levels of successive ones of the control signals.

Abstract: Apparatus, and an associated method, for performing joint equalization of received data vectors, received during operation of a multiple-input, multiple-output communication system. Slicing operations, implemented alternately as group slicing operations, decoupled slicing operations, and successive slicing operations are implemented at a joint equalizer of a receiving station of the multiple-input, multiple-output communication system. Once jointly equalized, equalized data vectors are provided to a joint decoder.

Abstract: Method and apparatus for soft bit computation with a reduced state equalizer. The method assures that the number of states in the equalizer is reduced to obtain acceptable complexity, while also ensuring that soft bit computation is performed for substantially all bits. The method involves computing a first set of soft bits from bits transmitted in a received signal, using a reduced-state trellis with finite non-zero delay, calculating hard decisions in response to the received signal, and also ensuring that substantially all soft bits are computed by employing zero-delay soft decision-making or decision-feedback equalization to compute a second set of soft bits. Furthermore, the hard decisions are used to compute the second set.

Abstract: The present invention relates to a method for modulating a signal in a system providing short-range wireless communication. In the signal, the signal is transmitted in packet format, in which each packet comprises at least a first part and a second part. In the method, the first part and the second part are modulated by using the first modulation method and the second modulation method, respectively. The second modulation method is initialized by using the first part. The invention also relates to a transceiver device and a wireless communication system, in which the method is applied.

Abstract: Apparatus, and an associated method, for performing joint equalization of received data vectors, received during operation of a multiple-input, multiple-output communication system. Slicing operations, implemented alternately as group slicing operations, decoupled slicing operations, and successive slicing operations are implemented at a joint equalizer of a receiving station of the multiple-input, multiple-output communication system. Once jointly equalized, equalized data vectors are provided to a joint decoder.

Abstract: Method and apparatus for soft bit computation with a reduced state equalizer. The method assures that the number of states in the equalizer is reduced to obtain acceptable complexity, while also ensuring that soft bit computation is performed for substantially all bits. The method involves computing a first set of soft bits from bits transmitted in a received signal, using a reduced-state trellis with finite non-zero delay, calculating hard decisions in response to the received signal, and also ensuring that substantially all soft bits are computed by employing zero-delay soft decision-making or decision-feedback equalization to compute a second set of soft bits. Furthermore, the hard decisions are used to compute the second set.

Abstract: The invention relates to a terminal, a terminal unit, a method, a receiving unit and transmitting unit. The terminal unit comprises a main receiver and at least one auxiliary receiver. At least one auxiliary receiver is connected to function as a receiving unit, which the main receiver controls by controlling means. At least one auxiliary receiver comprises means for supplying a signal received by it to processing by the main receiver and/or the terminal unit comprises a main transmitter and at least one auxiliary transmitter. The main transmitter and at least one auxiliary transmitter are connected to function as a transmitting unit, which the main transmitter controls by controlling means.

Abstract: A synchroniser for use in a receiver which receives signals, said synchroniser comprising means for providing a digital control signal, said control signal defining a plurality of different levels; means for controlling the level provided by successive ones of said control signals, successive ones of said control signal defining different values; and means for estimating the difference between the levels of successive ones of said control signals.