Motorola Corporation

Motorola Mobility LLC

Motorola Solutions, Inc.

Sebastien Simoens

Marc Bernard De Courville

Yufei W Blankenship

Brian Keith Classon

Philippe J Sartori

Stephanie Rouquette-Leveil

Ajit Nimbalker

Patrick Labbe

Markus Muck

Alexandre Ribeiro Dias

Veronique Buzenac Settineri

Eugene Vistosky

A transmitter comprises a block generator () which divides a data symbol stream into data symbol blocks. A divide processor () divides each block into a first set of data symbols stored in a first set buffer () and a second set of data symbols stored in a second set buffer (). A space time block encoder () codes the first set in accordance with a space time block code to generate a coded set of data symbols. A parallel processor () then creates a plurality of parallel data streams from the coded set and the second set. Each of the parallel data streams is allocated to one of a plurality of antennas (-). A plurality of parallel stream transmitters (-) transmits the parallel data streams in parallel in a communication channel from the plurality of transmit antennas (-).

Method and apparatus for transmitting and receiving a data symbol stream

A method for cooperative relaying within multi hop wireless communication systems includes a base station, in an attempt to decode a data packet, combining hard sliced channel bits and Logarithmic Likelihood Ratio (LLR) quality information received from relay stations who had also received the data packet with stored information about the data packet.

Method for cooperative relaying within multi-hop wireless communication systems

An Orthogonal Frequency Division Multiplexing, OFDM, transmitter comprises a signalling data generator () which generates a set of data symbols indicative of physical layer characteristics of data transmissions from the OFDM transmitter (). A first symbol generator () and second symbol generator () generates a first and second OFDM signalling symbol by allocating the set of data symbols to subcarriers. The allocation of the physical layer data symbols to subcarriers is different for the first OFDM signalling symbol and the second OFDM signalling symbol. A data packet generator () and transmitter () generate a data packet and transmit this to an OFDM receiver (). The OFDM receiver () determines the physical layer data symbols by combining the data symbols of corresponding subcarriers of the first and second OFDM signalling symbols and uses the resulting information to decode the user data of the data packet.

Transmission of signaling information in an OFDM communication system

A method and system for link adaptation between a wireless multi-carrier access point () and a wireless multi-carrier communication device () is described. The wireless multi-carrier access point obtains a set of available LEP methods from the wireless multi-carrier communication device. The wireless multi-carrier access point selects an LEP method from the set of available LEP methods, based on at least one link parameter. The wireless multi-carrier access point then communicates the LEP method selected, to the wireless multi-carrier communication device. The selected LEP method is used during the transmission of information between the wireless multi-carrier access point and the wireless multi-carrier communication device.

Method and system for link adaptation in a wireless multi-carrier communication system

Apparatus for estimating carrier and clock frequency offsets in OFDM systems employs a maximun likelihood estimator operation on the demodulated signals. The invention has the benefit of low complexity and obviates the need for any requirement for a dedicated training channel.

Estimation of frequency offsets in OFDM communication systems

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Sceaux, France

Sebastien Simoens