Patent application number | Description | Published |
20090016415 | Methods, computer program products and apparatus providing improved quantization - Thus, the exemplary embodiments of the invention describe methods, computer program products and apparatus that provide improved quantization, as may be useful within the context of a communication system (e.g., a wireless communication system) that has a relay node. In one non-limiting, exemplary embodiment, a method includes: receiving a transmission having source data from an information source; determining an estimate of the source data using a quantization technique based on maximizing data throughput; and transmitting a message including the determined estimate towards an information destination. | 01-15-2009 |
20100246599 | Apparatus and Method for Bit Remapping in a Relay Enhanced Communication System - An apparatus and method for bit remapping at a relay node in a communication system. In one embodiment, an apparatus includes a processor configured to remap an order of bits of a received signal from a source node to a different order of bits for a transmitted signal to a destination node when the transmitted signal is constructed with a modulation scheme different from the received signal. | 09-30-2010 |
20110002246 | Data Packet Communications in a multi-radio access environment - More than one radio-access technology is supported in an apparatus, and channel-coding functions in the apparatus are shared between at least two of said more than one radio-access technology. | 01-06-2011 |
20110044379 | METHOD AND APPARATUS FOR PROVIDING TRANSMISSION RELAY USING SOFT SYMBOL ESTIMATION - An approach is provided for relaying signals. A signal is received over a communication link and demodulated. Soft symbols are estimated based on probability information corresponding to the demodulated signal. The demodulated signal is remodulated based on the soft symbols. A relay signal is output based on the remodulated signal. | 02-24-2011 |
20120093249 | Apparatus and Method for Trellis-Based Detection in a Communication System - An apparatus for trellis-based detection in a communication system including a processor and memory having computer program code configured to construct a trellis representing a transmitted signal formed from a plurality of symbols, each having a constellation size, transmitted by a number of transmit antennas, and form a log likelihood ratio at nodes of the trellis as a log-sum of a number of exponential terms including a priori information corresponding to a hypothesized transmitted bit value of the plurality of symbols. The number of exponential terms is limited by a number of most likely paths of the trellis extending from each node of the trellis and the constellation size. The processor and memory including computer program code are configured to form a list at each node of the trellis of a size limited to the number of the most likely paths of the trellis extending from each node. | 04-19-2012 |
20120093266 | Apparatus and Method for Trellis-Based Detection in a Communication System - An apparatus for trellis-based detection in a communication system including a processor and memory having computer program code configured to construct a trellis representing a transmitted signal formed from a plurality of symbols, each having a constellation size, transmitted by a number of transmit antennas, and form a log likelihood ratio at nodes of the trellis as a log-sum of a number of exponential terms corresponding to a hypothesized transmitted bit value of the plurality of symbols. The number of exponential terms is limited by a number of most likely paths of the trellis extending from each node of the trellis and the constellation size. The processor and memory including computer program code are further configured to form a list at each node of the trellis of a size limited to the number of the most likely paths of the trellis extending from each node of the trellis. | 04-19-2012 |
20130121323 | Method for Receiving Frames in a Wireless Local Area Network - First and second frames are received by a wireless receiver. Modulation symbols in the first frame are determined and stored. If a cyclic redundancy check failure is determined for the first frame, the frame is not passed to medium access control. Modulation symbols in the second frame are determined and stored and a correlation factor is computed between the at least two modulation symbols from the first frame and the at least two modulation symbols from the second frame. If the receiver determines that the correlation factor exceeds a predefined threshold, it performs maximum ratio combining for modulation symbols from the first frame and modulation symbols from the second frame in order to obtain a combined frame. The combined frame is demodulated and cyclic redundancy check success is determined for the combined frame. | 05-16-2013 |
20130148640 | Mechanism for Controlling Data Transmission in Fragmentation Transmission Mode - There is provided a mechanism for controlling a transmission of data in a fragmentation transmission mode. When fragments are transmitted in a fragmentation transmission mode, it is determined whether the fragment frame is received successfully or whether an acknowledgment message for confirming a successful transmission of the fragment frame is received. In case the acknowledgment for the successful transmission of the one fragment frame is not received, or the fragment is frame is not successfully received, the fragmentation transmission mode is maintained and a retransmission of the fragment frame is initiated. | 06-13-2013 |
20140105096 | Method and Apparatus for Facilitating Multicast Service - A method is provided for facilitating multicast service. The method may include receiving data multicast to members of a multicast group. The method may further include determining, based at least in part on an indication received during multicast of the data, that a late joining device has joined the multicast group subsequent to initiation of the multicast. The method may additionally include marking, based at least in part on the received indication, a point at which the late joining device began to participate in the multicast. A corresponding apparatus and computer program product are also provided. | 04-17-2014 |
20140313949 | SIGNALING AND PROCEDURE DESIGN FOR CELLULAR CLUSTER CONTENDING ON LICENSE-EXEMPT BANDS - The specification and drawings present a new method, apparatus and software related product (e.g., computer readable memory) for implementing a device-to-device communication of cellular, e.g., LTE, wireless devices on a shared band (e.g., ISM 2.4 GHz band), including the signaling and procedure design for contending or coordinating with the already existing radio systems (e.g., WLAN systems). | 10-23-2014 |
Patent application number | Description | Published |
20100303176 | METHODS AND APPARATUSES FOR MIMO DETECTION - Methods and apparatuses are provided for MIMO detection. A method may include considering a symbol vector received over MIMO system. The method may further include generating a list comprising a predefined number of candidate transmit symbol vectors based at least in part upon the received symbol vector using a trellis comprising a plurality of nodes that apply distributed list decoding to generate the list, wherein the list of the predefined number of candidate transmit symbol vectors comprises the predefined number of candidate transmit symbol vectors derived from the set of all possible trellis paths as determined based at least in part upon the respective cumulative trellis path weights. Corresponding apparatuses are also provided. | 12-02-2010 |
20110080964 | ADAPTIVE CODEBOOK FOR BEAMFORMING IN LIMITED FEEDBACK MIMO SYSTEMS - A method for beamforming is described. The method includes generating a pseudo-random unitary matrix. A first codebook is rotated with the pseudo-random unitary matrix. The method includes generating a second codebook based upon the rotated codebook and a correlation matrix. A codeword is selected from the second codebook using a channel matrix. The correlation matrix is updated based upon the selected codeword. The method includes transmitting an index of the selected codeword in the codebook. The method includes receiving the codeword index. A codebook is consulted using the codeword index to locate a codeword. Beamforming is performed based upon the located codeword. An apparatus is also described. | 04-07-2011 |
20110216693 | Method and Apparatus for Ordered Partial Detection with MIMO Cooperation - In accordance with an example embodiment of the present invention, an apparatus comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to perform at least the following: receiving a MIMO (multiple-input multiple output) encoded symbol vector, the symbol vector encoding a plurality of streams of a source node; estimating channel matrix between the source node and the apparatus; re-ordering columns in said channel matrix; determining a plurality of feedback bits based at least in part on the re-ordered channel matrix, wherein each bit of the feedback bits indicates detection or no detection of the corresponding antenna streams of the source node; and transmitting the feedback bits. | 09-08-2011 |
20140198688 | Method and Apparatus for Reducing Self Interference - A method, apparatus, and computer program product are provided to reduce self-interference in a transceiver. In the context of a method, a self-interference channel estimate may be determined. A reconstructed interference may further be determined based at least in part on the self-interference channel estimate and a signal to be transmitted and the reconstructed self-interference is caused to be subtracted from a received signal. According to a further embodiment, detection of a desired signal may be disabled while this process is repeated until a residual self-interference is below a threshold, at which point detection of the desired signal may be enabled. | 07-17-2014 |