Abstract: Systems and methods for power conservation via frame aggregation in a wireless network. A station may enter low-power sleep mode for a prescribed duration and subsequently transmit or receive either a burst transmission or an aggregate frame comprising a prescribed amount of data. The prescribed duration and amount of data may be analytically characterized in terms of the arrival rate of data, latency, power consumption, and various additional parameters in the wireless network. The systems and methods can be applied to conserve power in data-intensive high-rate wireless mesh networks, finding application in cellular backhaul, mm wave small cell networks, oil and gas exploration, and wide area monitoring.

Abstract: As monitoring systems for applications such as earthquake detection, oil and gas exploration, agriculture, and meteorological studies continue to advance in size and data quality, the task of data acquisition becomes equally challenging. Wireless systems for such monitoring applications are required to transfer data in a time-sensitive manner while conserving power in order to extend the operational life of the sensing/monitoring devices. Systems and methods for data acquisition for such scenarios are disclosed, with the objective of collision prevention and power conservation.

Abstract: As monitoring systems for applications such as earthquake detection, oil and gas exploration, agriculture, and meteorological studies continue to advance in size and data quality, the task of data acquisition becomes equally challenging. Wireless systems for such monitoring applications are required to transfer data in a time-sensitive manner while conserving power in order to extend the operational life of the sensing/monitoring devices. Systems and methods for data acquisition for such scenarios are disclosed, with the objective of collision prevention and power conservation.

Abstract: Methods and systems that are capable of detecting and correcting the sampling frequency offset as part of signal synchronization in MIMO OFDM systems. An exemplary MIMO OFDM system includes a transmitter with a number of OFDM modulators that provide data to antennas for transmission across a channel to a receiver. The OFDM modulators include a training symbol inserter that may insert a matrix of pilot tones into the data. The data including the matrix of pilot tones is received by a receiver having a number of OFDM demodulators including a synchronization circuit. The synchronization circuit uses the matrix of pilot tones to detect and correct the sampling frequency offset as part of the signal synchronization. The synchronization circuit may apply an open loop process including sampling frequency offset estimation, phase rotation, and channel estimation.

Abstract: In a communication system, and in particular a wireless Orthogonal Frequency Division Multiplexing (OFDM) communication system, the present invention provides systems for synchronizing data transmitted across a channel. The present invention may be used in a Multi-Input, Multi-Output (IMO) system in which the data is transmitted from any number of transmitting antennas and received by any number of receiving antennas. The number of transmitting and receiving antennas does not necessarily have to be the same. Circuitry is provided for synchronizing the data in both the time domain and frequency domain. Time synchronization involves coarse time synchronization and fine time synchronization. Frequency synchronization involves coarse frequency offset estimation, fine frequency offset estimation, and frequency offset correction.

Abstract: Methods and systems that are capable of detecting and correcting the sampling frequency offset as part of signal synchronization in MIMO OFDM systems. An exemplary MIMO OFDM system includes a transmitter with a number of OFDM modulators that provide data to antennas for transmission across a channel to a receiver. The OFDM modulators include a training symbol inserter that may insert a matrix of pilot tones into the data. The data including the matrix of pilot tones is received by a receiver having a number of OFDM demodulators including a synchronization circuit. The synchronization circuit uses the matrix of pilot tones to detect and correct the sampling frequency offset as part of the signal synchronization. The synchronization circuit may apply an open loop process including sampling frequency offset estimation, phase rotation, and channel estimation.