公开(公告)号：US09614558B2

公开(公告)日：2017-04-04

申请号：US15081592

申请日：2016-03-25

申请人： VT IDIRECT, INC.

发明人： Ronggang Qi ,  Baoyan Ding

IPC分类号： H04B1/10 ,  H04L7/00 ,  H04L25/02 ,  H04L27/00

CPC分类号： H04B1/10 ,  H04B1/70752 ,  H04B1/7077 ,  H04B1/709 ,  H04B7/2048 ,  H04B7/2125 ,  H04B7/2656 ,  H04L5/0053 ,  H04L7/0041 ,  H04L25/021 ,  H04L25/0228 ,  H04L27/0014 ,  H04L27/2278 ,  H04W56/0035

摘要： A device and method for unwrapping phase samples of a burst signal. The device generates a set of vectors including phase samples. A first mean and a first variance of the vectors is computed, and a set of unwrapped phase samples of the burst signal are computed by rotating phase samples of the vector having a smallest first variance by a first rotation amount. The set of vectors is updated based on a new phase sample and a second mean and a second variance of the updated set of vectors is computed. Differences between unwrapped phase samples and a number of phase samples included in the vector having the smallest computed second variance are computed. A next unwrapped phase sample is generated by rotating the new phase sample by a second rotation amount corresponding to a median value of the computed differences.

公开(公告)号：US09621205B2

公开(公告)日：2017-04-11

申请号：US15081532

申请日：2016-03-25

申请人： VT IDIRECT, INC.

发明人： Ronggang Qi ,  Baoyan Ding

IPC分类号： H04B1/10 ,  H04B1/7075 ,  H04L7/00 ,  H04L25/02 ,  H04L27/00

CPC分类号： H04B1/10 ,  H04B1/70752 ,  H04B1/7077 ,  H04B1/709 ,  H04B7/2048 ,  H04B7/2125 ,  H04B7/2656 ,  H04L5/0053 ,  H04L7/0041 ,  H04L25/021 ,  H04L25/0228 ,  H04L27/0014 ,  H04L27/2278 ,  H04W56/0035

摘要： A device and method for estimating a bias in a frequency estimate of a received signal. Circuitry generates a first signal including a number of sample-blocks, wherein the first signal is shifted in frequency from the received signal by a first frequency shift. Based on the first signal, a second signal and a third signal are generated, by shifting a frequency of each of the samples of the first generated signal by a second frequency shift and a third frequency shift, respectively. For each generated signal, a variance for each sample-block is computed. An average variance of the computed sample-block variances is further calculated and a bias of the received signal is determined as one of the first frequency shift, the second frequency shift, and the third frequency shift, corresponding to the generated signal having the smallest calculated average variance.