Pctel, Inc.

Spirent Communications of Rockville, Inc.

Meng Chen

George R Bailey

Vikash Srivastava

A method and apparatus are provided for decoding a wireless signal from a set of samples with an embedded training sequence. The method includes the steps of determining a first frequency offset from the samples where the first frequency offset is assumed to be less than a Nyquist frequency of the training sequence and calculating a first carrier to interference ratio based upon the first frequency offset. The method further includes the steps of determining a second frequency offset from the samples by subtracting an absolute value of the first frequency offset from an integer multiple of the Nyquist frequency and giving the second frequency offset a sign opposite that of the first frequency offset, calculating a second carrier to interference ratio based upon the second frequency offset and selecting one of the first and second frequency offsets based upon a relative values of the calculated carrier to interference ratios.

Iterative pilot-aided frequency offset estimation and C/I measurement for TDMA signal with offset larger than nyquist frequency of the reference symbol rate

A method and system of communicating visual communication quality information, includes extracting reduced-reference (RR) feature data from visual content, embedding the RR feature data in the visual content; and transmitting the visual content with the embedded RR feature data. Visual communication quality is assessed by receiving visual content which includes visual content data and a first set of embedded RR feature data, retrieving the first set of RR feature data from the visual content data, and generating a second set of RR feature data from the visual content data. The second set of RR feature data corresponds to substantially identical features of the visual content data as that used to generate the first set of RR feature data. The first set of RR feature data is compared to the second first set of RR feature data to determine a quality of the visual content based upon the comparison.

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Frederick, MD, United States of America

Meng Chen