Abstract: Systems and methods to accomplish a power control system in a MANET are described herein. To reduce detectability of the MANET, the controller 310 can reduce transmit power at individual links while operating the link's modulation and coding data rate and data queue backlog at levels that are sufficient to meet the user's offered load.

Abstract: A method for providing timing recovery from a received digital data stream where the digital data stream is a series of consecutive data samples. The method separates the data stream into a series of consecutive observation periods where each observation period includes the same number of consecutive data samples. The method also includes identifying a series of consecutive timing recovery data samples in each observation period where the timing recovery data samples are used for timing recovery and other data samples in the observation period are not used for timing recovery, and where the number of data samples used for timing recovery in each observation period is less than the number of data samples that are not used for timing recovery in the observation period. The method then uses the timing recovery data samples for timing recovery in each observation period.

Abstract: A timing recovery system that provides a timing estimate between a transmitter clock and a receiver clock. The system includes a down-converter that converts a received intermediate frequency signal in the receiver and down-converts, using Fs/4 down-conversion, the received signal into baseband in-phase and quadrature phase signals. The baseband in-phase and quadrature phase signals are sent to a direct down-converter that frequency shifts the in-phase and quadrature phase. The frequency-shifted in-phase and quadrature phase baseband signals are then low-pass filtered in order to isolate the frequency components of interest, reduce noise, and remove zeros that are artifacts of the Fs/4 down-conversion. The signals are sent to a square-law non-linearity circuit that provides squaring non-linearity to generate non-linear in-phase and quadrature phase signals. The non-linear in-phase and quadrature phase signals are sent to a single-pole, low-pass post-filter circuit that generates the timing estimate.

Abstract: A system for receiving signals is set forth. The system includes an open loop frequency offset updating system adapted to receive an input signal. The open loop frequency offset updating system updates a frequency offset recursively, using a real time update value for value ?(f,N). The system samples the signal and calculates an alternate quantity based on ?(f,N) to determine a maximum value of the alternate quantity.

Abstract: A timing recovery system that provides a timing estimate between a transmitter clock and a receiver clock. The system includes a down-converter that converts a received intermediate frequency signal in the receiver and down-converts, using Fs/4 down-conversion, the received signal into baseband in-phase and quadrature phase signals. The baseband in-phase and quadrature phase signals are sent to a direct down-converter that frequency shifts the in-phase and quadrature phase. The frequency-shifted in-phase and quadrature phase baseband signals are then low-pass filtered in order to isolate the frequency components of interest, reduce noise, and remove zeros that are artifacts of the Fs/4 down-conversion. The signals are sent to a square-law non-linearity circuit that provides squaring non-linearity to generate non-linear in-phase and quadrature phase signals. The non-linear in-phase and quadrature phase signals are sent to a single-pole, low-pass post-filter circuit that generates the timing estimate.

Abstract: A method for providing timing recovery from a received digital data stream where the digital data stream is a series of consecutive data samples. The method separates the data stream into a series of consecutive observation periods where each observation period includes the same number of consecutive data samples. The method also includes identifying a series of consecutive timing recovery data samples in each observation period where the timing recovery data samples are used for timing recovery and other data samples in the observation period are not used for timing recovery, and where the number of data samples used for timing recovery in each observation period is less than the number of data samples that are not used for timing recovery in the observation period. The method then uses the timing recovery data samples for timing recovery in each observation period.

Abstract: A system for receiving signals is set forth. The system includes an open loop frequency offset updating system adapted to receive an input signal. The open loop frequency offset updating system updates a frequency offset recursively, using a real time update value for value ?(ƒ,N). The system samples the signal and calculates an alternate quantity based on ?(ƒ,N) to determine a maximum value of the alternate quantity.