Abstract: Synchronization techniques for reducing the effects of time dispersive wireless communications channels are presented. A synchronization technique for communications over a time dispersive wireless channel includes receiving a signal having at least identical first and second symbols, and calculating a metric for each sampling time by correlating respective samples of the first symbol included in a first sampling window with respective samples of the second symbol included in a second sampling window. The technique further includes identifying one of the sampling times at which the metric attains a maximum value, and estimating an optimal time offset for synchronizing to the received signal based on the identified sampling time. Optionally, the technique further includes estimating a carrier frequency offset based on the difference of phase of the complex conjugate samples at the maximum absolute value of the metric.

Abstract: Methods and systems for detecting and synchronizing to frequency hopped packets are presented. A technique for detecting a transmitter frequency hopping pattern includes receiving a packet of preamble symbols respectively transmitted over multiple frequency sub-bands according to the transmitter frequency hopping pattern, and partitioning predetermined frequency hopping patterns into disjoint groups of patterns, each group of patterns having an associated periodicity of the received preamble symbols. A group of patterns is selected by comparing a correlation metric of two received preamble symbols for each of the associated periodicities in a first selected frequency sub-band, and a pattern from the selected group of patterns is selected based on a timing of a detected first peak of the correlation metric in a second selected frequency sub-band.

Abstract: Synchronization techniques for reducing the effects of time dispersive wireless communications channels are presented. A synchronization technique for communications over a time dispersive wireless channel includes receiving a signal having at least identical first and second symbols, and calculating a metric for each sampling time by correlating respective samples of the first symbol included in a first sampling window with respective samples of the second symbol included in a second sampling window. The technique further includes identifying one of the sampling times at which the metric attains a maximum value, and estimating an optimal time offset for synchronizing to the received signal based on the identified sampling time. Optionally, the technique further includes estimating a carrier frequency offset based on the difference of phase of the complex conjugate samples at the maximum absolute value of the metric.

Abstract: Methods and systems for detecting and synchronizing to frequency hopped packets are presented. A technique for detecting a transmitter frequency hopping pattern includes receiving a packet of preamble symbols respectively transmitted over multiple frequency sub-bands according to the transmitter frequency hopping pattern, and partitioning predetermined frequency hopping patterns into disjoint groups of patterns, each group of patterns having an associated periodicity of the received preamble symbols. A group of patterns is selected by comparing a correlation metric of two received preamble symbols for each of the associated periodicities in a first selected frequency sub-band, and a pattern from the selected group of patterns is selected based on a timing of a detected first peak of the correlation metric in a second selected frequency sub-band.