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Beceem Communications

www.beceem.com
Santa Clara, CA, United States
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Patent
Beceem Communications | Date: 2013-09-18

Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna.


Patent
Beceem Communications | Date: 2012-10-31

Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna.


Patent
Beceem Communications | Date: 2010-11-11

Embodiments are directed to a wireless receiver system that utilizes a special structure of pilot symbols used for synchronization and channel estimation in transmission packets to measure noise power at the receiver. The periodicity of the pilot signal sequences is used to extract the noise power from the received signal. Such extraction is achieved by subtracting the received signals from two pilot slots which are separated by the known periodicity of the training sequence. This method relies on the fact that desired signal and system interference signals will cancel out after the subtraction process. Measuring the power of the residual signal after subtraction represents the estimate of the noise power. Several consecutive such residual signals can be first summed up before measuring the power to improve the estimate of the noise power at the receiver. To further improve the performance, estimates of the desired signal produced by a channel estimation block can be first subtracted from each of the received signals on two pilot slots which are then to be subtracted and are separated by the known periodicity of the pilot sequence.


Patent
Beceem Communications | Date: 2010-11-19

Embodiments for at least one method and apparatus of a multiple antenna transceiver are disclosed. One embodiment of the multiple antenna transceiver includes a multiport network having a plurality of first ports and a plurality of second ports, wherein at least one of the second ports is responsive to at least two of the first ports. The multiple antenna transceiver further includes a plurality of antennas, an antenna connected to each of the plurality of second ports. Another embodiment includes a multiple antenna subscriber unit architecture.


Patent
Beceem Communications | Date: 2012-10-31

Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna.


Patent
Beceem Communications | Date: 2010-07-15

Methods and apparatuses of a mobile subscriber transmitting information to a base station are disclosed. One method includes identifying an uplink transmission condition. If the uplink transmission condition is identified, the mobile subscriber transmits a message over multiple uplink frames. The mobile subscriber informs the base station that it is transmitting the message over the multiple uplink frames.


Patent
Beceem Communications | Date: 2010-01-29

Embodiments for space-time coding are disclosed. One method includes establishing a priority for each of a plurality of data streams. A number of data bits for each of the plurality of data streams are allocated. A desired signal quality for each of the plurality of data streams is determined based on the corresponding priority. Each of the plurality of data streams are modulated according to the allocated number of data bits of each of the plurality of data streams. A space-time code is selected for each of the plurality of data streams based at least partially on the desired signal quality for each of the plurality of data streams, wherein at least one of the space-time codes is at least one of a vector or a matrix. Each of the modulated data streams are space-time coded with the selected space-time code. The space-time coded modulated data streams are summed, and transmitted.


Patent
Beceem Communications | Date: 2010-03-08

Embodiments for methods and apparatuses for processing a multi-carrier signal are disclosed. One method includes shaping a frequency spectrum of a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal. The shaped frequency spectrum multi-carrier transmit signal is amplified with a power amplifier, wherein a power level of an output of the power amplifier is greater than a rated power level of the power amplifier.


Patent
Beceem Communications | Date: 2010-11-01

Methods and systems for testing a software program are provided. The methods include receiving a textual input for testing at least one static type used by the software program. The textual input of an embodiment is pre-linked to the at least one static type. The method includes creating a dynamic type based on the textual input in a dynamically typed language. The dynamic type is populated based on a predefined set of test vectors and is then passed on to the software program. The software program is executed using the dynamic type. Executing the software program by using the dynamic type invokes the at least one static type used by the software program.


Patent
Beceem Communications | Date: 2010-06-15

Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.

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