Patent application number | Description | Published |
20090016375 | METHOD AND MODULE FOR CONSTRUCTING A FRAME STRUCTURE IN COMMUNICATION SYSTEMS - A module constructs a frame for communication in a communication system that supports a new standard and a legacy standard, the new standard being backward compatible with the legacy standard. The module comprises a first frame generator configured to generate a first portion of the frame, the first portion of the frame to support a first set of data to be transmitted in the legacy standard in each of a number of first bands, a second frame generator configured to generate a second portion of the frame, the second portion of the frame to support a second set of data to be transmitted in the new standard in a second band composed of the first bands, and a frame constructor configured to construct the frame based on the first portion of the frame from the first frame generator and the second portion of the frame from the second frame generator. | 01-15-2009 |
20090257516 | SYSTEM AND METHOD FOR PILOT DESIGN FOR DATA TRANSMITTED IN WIRELESS NETWORKS - A method for pilot design for data to be transmitted by an orthogonal frequency-division multiplexing (OFDM) based communication system, the data being represented by a plurality of OFDM symbols. The method includes allocating pilot symbols for a data stream to be included in ones of the OFDM symbols; and performing a frequency shift on at least one of the OFDM symbols, to reduce frequency distance disparities among the pilot symbols. | 10-15-2009 |
20090279630 | JOINT TRANSCEIVER DESIGN FOR MIMO COMMUNICATIONS - A method and apparatus for transmitting data in a MIMO communication system, the method including encoding at least one data symbol by implementing a first precoding scheme, the first preceding scheme including a precoder derived from a first channel state information (CSI). The method further includes selecting at least one antenna that maximizes the first CSI, the at least one antenna being selected by implementing a first selection scheme, and transmitting the at least one data symbol via the at least one antenna. | 11-12-2009 |
20090279631 | SYSTEMS AND METHODS FOR MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATIONS SYSTEMS - In a multiple input multiple output (MIMO) wireless communication system, there is provided a method for error correction. The method includes receiving an original signal in an initial MIMO format, detecting an error in the original signal, and notifying a transmitter of the error detected in the original signal. The method also includes receiving a new retransmitted signal in a first retransmitted MIMO format, different from the initial MIMO format, the new retransmitted signal including at least a fraction of encoded bits of the original signal. The method also includes correcting the original signal by applying the new retransmitted signal to the original signal. | 11-12-2009 |
20100008308 | LINK ADAPTION IN WIRELESS COMMUNICATIONS - Methods and systems for providing generalized link adaptation in an orthogonal frequency-division multiple access wireless communications network can include determining a number of desired resource blocks (RBs) for each user of a plurality of users; calculating a maximal channel gain G | 01-14-2010 |
20100008431 | APPARATUS AND METHOD FOR CHANNEL STATE INFORMATION FEEDBACK - A method for a mobile station to provide to a base station feedback of channel state information (CSI) regarding a plurality of communication channels between the mobile station and the base station. The method includes: estimating the CSI by calculating a plurality of channel responses each for one of the communication channels; compressing the estimated CSI; and sending the compressed CSI as the feedback to the base station. | 01-14-2010 |
20100008438 | SYSTEM AND METHOD FOR BIT ALLOCATION AND INTERLEAVING - A method for transmitting data represented by a plurality of coded bits includes: allocating the coded bits to a plurality of groups; rearranging, for a retransmission of the coded bits, ones of the coded bits allocated to a first one of the plurality of groups to a second one of the plurality of groups, and ones of the coded bits allocated to the second one of the plurality of groups to the first one or a third one of the plurality of groups; and changing, for the retransmission, a sequence of coded bits allocated to each of the plurality of groups after the rearranging. | 01-14-2010 |
20100111208 | COMMUNICATION METHODS AND SYSTEMS HAVING PERMUTATION SCHEMES - A wireless communication method implemented in a communication system may include receiving a data sequence to be permuted, and obtaining information associated with the data sequence to be permuted, the information containing at least a length of the data sequence and a sampling spacing for permuting the data sequence. The method may also include identifying a first portion of the data sequence having a first number of adjacent data items, and a second portion of the data sequence having a second number of adjacent data items. The method may also include accessing the first number of data items from the first portion at the sampling spacing, and placing the accessed first number of data items into a predetermined number of sub-blocks included within a permuted data sequence to be generated based on the received data sequence. The method may further include inserting each of the second number of data items into an end position of one of the sub-blocks within the permuted data sequence, and outputting the permuted data sequence. | 05-06-2010 |
20100111210 | COMMUNICATION METHODS AND SYSTEMS HAVING PERMUTATION SCHEMES - A wireless communication method implemented in a communication system includes receiving a first data sequence, and processing the first data sequence to obtain information containing at least one of a first number and a sampling spacing associated with the first data sequence. The method also includes permuting the first data sequence to generate a permuted second data sequence. Permuting the first data sequence includes determining a first parameter based on at least one of the first number and the sampling spacing, determining a second parameter based on at least one of the first parameter, the first number, and the sampling spacing, and determining a mapping relationship between a j-th data item of the permuted second data sequence and an i-th data item of the first data sequence. The method further includes outputting the permuted second data sequence. | 05-06-2010 |
20100111219 | COMMUNICATION METHODS AND SYSTEMS HAVING DATA PERMUTATION - A wireless communication method may include receiving a first data stream comprising a data sequence and computing a permutation sequence based on a content of the received first data stream. The permutation sequence is a non-predetermined sequence. The method may further include performing a permutation on the first data stream based on the permutation sequence to generate a permuted first data stream being configured for wireless transmission. | 05-06-2010 |
20100119071 | APPARATUS AND METHOD FOR SUBCARRIER SCRAMBLING - A subcarrier scrambling method for use in a transmitter with multiple subcarriers, the transmitter being configured to allocate pilot symbols and data symbols for each of a plurality of resource units (RUs). The method includes: applying, for each of the plurality of RUs, a first intra RU sequence to the pilot symbols, to thereby generate a plurality of scrambled pilot symbols; applying, for each of the plurality of RUs, a second intra RU sequence to the data symbols, to thereby generate a plurality of scrambled data symbols; and combining the plurality of scrambled pilot symbols and the plurality of scrambled data symbols to form the plurality of RUs. | 05-13-2010 |
20100158143 | SYSTEM AND METHOD FOR SUBCARRIER ALLOCATION AND PERMUTATION - A subcarrier allocation method for use by a transmitter, the transmitter being configured to, when transmitting first and second data streams, allocate pilot symbols for the first and second data streams to subcarriers, such that a first plurality of subcarriers carry the pilot symbols for the first data stream and a second plurality of subcarriers carry the pilot symbols for the second data stream. The method includes allocating, when the transmitter transmits the first data stream but does not transmit the second data stream, the second plurality of subcarriers to carry no formation or information relating to the first data stream. | 06-24-2010 |
20110158185 | APPARATUSES AND METHODS FOR WIRELESS COMMUNICATIONS USING A PERMUTATION SEQUENCE - A method for data transmissions in a wireless communication system includes: allocating resources for data to be transmitted; providing a seed number from the communication system; setting, based on the seed number, at least one parameter for a pseudo-random mapper having an input variable and an output variable; initializing an array with a number of base elements; increasing a current value of the input variable by a current value of a counter; and calculating a value of the output variable based on the pseudo-random mapper and the increased value of the input variable. The method further includes: swapping a first base element and a second base element in the array, the first base element being identified based on the current value of the counter, and the second base element being identified based on the value of the output variable; performing permutation on the resources by using the array as a permutation sequence; and transmitting the data. | 06-30-2011 |
20110158330 | Systems And Methods For Providing Preamble Codes And Generating Preamble Signals In Wireless Communications - A method for a user terminal to generate a preamble signal in a wireless communication system, the method including: generating an orthogonal sequence as a first sequence; performing cyclic shift on an antipodal version of the orthogonal sequence to generate a second sequence; and combining the first sequence and the second sequence to generate the preamble signal. | 06-30-2011 |