Texas Instruments Corporation

Liran Brecher

Yuval Jakira

Dotan Ziv

Matan Ben-Shachar

Oran Naftali

Chen Loewy

Asaf Even-Chen

Omri Eshel

Naftali Sommer

Itay Lusky

Lior Ophir

Ofir Shalvi

Yigal Bitran

Ariel Yagil

Etai Zaltsman

Noam Tal

Naor Goldman

Amos Klimker

Mor Miller

Shai Erez

Alon Elhanati

Shaul Klein

Amir Peleg

Matitiyahu Amit

Melamed Oded

According to an embodiment, a system and method is disclosed for efficient wake up in a wireless communication device for receiving beacons without significantly affecting the battery power and data throughput. Wireless device receives beacons from network elements such as access points. If beacons are not received as scheduled within defined intervals, then the wireless device determines a pattern of beacon reception timings and uses a weighted score process to select the best possible reception timing pattern and uses it as the schedule for receiving beacons on going forward basis, thus avoiding staying awake at all time to receive misaligned beacons.

System and method for efficient wakeup for beacon reception

A network device serving two or more networks using periodic times slots for transmission events is configured to determine that one of the periodic time slots on one of the networks has or soon will collide with one of the periodic time slots on the other network by processing time stamps for events on each network. Either of the periodic time slots may be occasionally shifted by a time shift amount to avoid a collision between the periodic time slots on each network. Shifting the periodic time slots may be performed by transmitting a Bluetooth connection parameter update packet.

Avoidance of collisions and connection loss in network device serving multiple networks

A method includes processing an input sequence of samples of an orthogonal frequency division multiplexing signal (OFDM) to reduce a peak to average power ratio (PAPR) of the OFDM signal with given constraints of an error vector magnitude (EVM) parameter and a spectral mask parameter for the OFDM signal during a first processing iteration. The method includes performing at least one other iteration of the first processing iteration on a subsequent time domain sequence generated in the first processing iteration to reduce the PAPR of the OFDM signal below a system target PAPR threshold and below threshold limits for the EVM parameter and the spectral mask parameter.

Peak to average power ratio reduction of OFDM signals

One embodiment of the present invention includes a method for controlling a gain of a wideband signal. The method comprises adding a virtual channel to the wideband signal, the wideband signal comprising at least one channel. The method also comprises monitoring an output power associated with the wideband signal that includes the at least one channel and the virtual channel. The method further comprises setting a gain factor to achieve a predetermined output power of the wideband signal and amplifying the wideband signal based on the gain factor.

Automatic gain control for a wideband signal

A novel and useful baseline wander correction mechanism for use with transformer coupled baseband communication receivers. Parametric estimation of the transformer model is used estimate and cancel the baseline wander effect. A parametric model is used to model the baseline wander impairment created by the transmitter and receiver transformers as a high pass filter having an exponential decay parameter alpha. A correction signal for both the far end and echo signal paths are calculated and summed to generate a total correction signal. The total correction signal is partitioned into an analog correction signal that is applied to the analog portion of the communications receiver and into a digital correction signal that is similarly applied to the analog portion of the communications receiver.

Baseline wander correction for communication receivers

A novel apparatus and method of packet re-sequencing applicable to systems wherein packets are assigned sequence numbers and transmitted over multiple channels with the requirement they be re-ordered at the receiving side. The mechanism is particularly suitable for use in cable systems adapted to implement the DOCSIS 3.0 specification which permits the bonding of a plurality of downstream channels into a single virtual high data rate pipe. In operation, received packets are stored in a memory whereby a pointer to the memory storage location is written into a context table diagram in accordance with the sequence number extracted from the packet. Packets are released in sequence order regardless of the order in which they were received.

Cable modem downstream channel bonding re-sequencing mechanism

Systems and methods for automatic gain control are disclosed. In one aspect of the invention, a system is provided that comprises a programmable gain amplifier that amplifies an input signal based on a gain signal. The system further comprises an analog-to-digital converter that generates at least one digital output signal from the amplified input signal, and an automatic gain control component that determines an adjustment of the gain signal based on a comparison of the at least one digital output signal to a predetermined maximum amplitude reference level.

Systems and methods for automatic gain control

A system, apparatus and method are disclosed for implementing a managed network in a hybrid network environment to support nodes having managed network capability together with nodes that do not support managed network capabilities. In one form of the invention, a method for managing data communication on a network coupled to first nodes and second nodes is provided comprising: controlling a first time period for one or more first data transmissions on the network wherein the first nodes are permitted to transmit data during the first time periods and the second nodes are not permitted to transmit data during the first time period by causing the second nodes to treat the first time period as a single transmission period. Other methods, apparatus and systems are provided.

Network manager for a hybrid network environment

In frequency channel communications, constraints on transmit power characteristics can be complied with by implementing constellation shaping () in the transmitter. In transmitters which use transmit filtering () to comply with constraints on transmit power characteristics, the transmitter can also implement, upstream of the transmit filter, precoding () designed for a desired cooperation with the transmit filter.

Spectral power management for constrained transmissions using constellation shaping

A system and method of data communication for multiple stations using shared communication media within a network. A data communication message structure uses a preamble that includes both source and destination data. The message structure allows use of collision resolve logic to prioritize stations within the network such that the winner is the one with the highest priority. The destination preamble data allows each station to sample and store destination data to a buffer for decoding in the background where the station does not have to support the network data rate.

Multi-user network system and method of data communication using enhanced preamble

The detection of symbols in digital burst transmissions is improved by an equalizer () that initializes the values of only a subset of its filter coefficients (C, D), and thereafter begins to decode the symbols using an iterative, decision directed algorithm that determines all of its filter coefficients. This can advantageously provide an acceptable trade-off between computational complexity and equalizer performance.

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Kfar Saba, Israel

Liran Brecher