Báo cáo hóa học: " Time Delay Estimation in Room Acoustic Environments: An Overview" potx

... source of the wavefront may also move from time to time, resulting in a changing time delay. All these factors make time delay estimation a complicated and challenging problem. Over the past few decades, ... F. Silverman, “A robust method for speech signal time- delay estimation in reverberant rooms,” in Proceedings of IEEE International Conference on Acoustics, Speech,...

Ngày tải lên: 22/06/2014, 23:20

... the time- window or the delay spread over which we look for the channel paths spans between d min T s and d max T s seconds, and d min and d max are chosen as integer multiples of the sampling ... f D and τ = τ l . An example of a time- frequency grid for a 6-path Rayleigh fading channel, covering a fre- quency offset of 1 kHz and a time window of 10 chips, is shown in Figure 4. 3....

Ngày tải lên: 22/06/2014, 23:20

... of finger print images, it is essential to in- corporate an enhancement algorithm in the minutiae extrac- tion module. Ridge distance is an intrinsic property of finger- print images and it is used ... periodic characteristics of point u, v. The dominant period of signals in an area can be determined by analyzing the distribution of values of |G (u,v) |. A fingerprint image and its D...

Ngày tải lên: 23/06/2014, 01:20

... LS channel estimates, the best linear unbiased estimation (BLUE) scheme for their linear combining is developed and studied. Keywords and phrases: antenna array, downlink channel, channel estimation, ... effect of such a combining on the performance of downlink channel estimation is investi- gated. Downlink Channel Estimation in Cellular Systems 1333 Note that the optimal γ in (25)...

Ngày tải lên: 23/06/2014, 01:20

... EMG machines now provide an intensity measure, constant- intensity protocols (albeit at lower levels of intensity than used in this study) are used during clinical n eedle EMG examinations. In this ... acquisition, analysis and interpretation. LM was the senior researcher and principal investigator of the research study. All authors read and approved the final manuscript. Competing inte...

Ngày tải lên: 19/06/2014, 08:20

... of handling the proximal femur during both the hip disloca- tion and the prosthesis insertion. Using a bone holder for gently holding the femur in the subtrochanteric area made the dislocation and ... and internal rotation of the femur possi- ble, allowing exposure of the joint and preparing the prox- imal femur and, if needed, the acetabulum. One should be extremely careful in using this...

Ngày tải lên: 20/06/2014, 04:20

... 157, spinal cord injury 157 and traumatic brain injury 157), age range 11–90 years and 70 % male in nine rehabilitation facilities in Scandinavia, were fitted to the Rasch model. A detailed analysis ... Cord Injury 3 Stroke 4 Traumatic Brain Injury Table 2: Items showing significant DIF in pooled data and between stroke and TBI Pooled data Stroke and TBI pooled Eating SCI Grooming All...

Ngày tải lên: 20/06/2014, 15:20

... performance by 14% in disparity estimation and 8% in total encoding time. As shown in Figure 7, no noticeable degradation in quality was observed. The ∆BDPSNR decrease was less than 0.05 dB and ... distribution of selected SKIP, inter and intra modes in a B-picture. The moving object (the dancer in the middle of the scene) is encoded as intra or inter mode, but the backgroun...

Ngày tải lên: 21/06/2014, 17:20

... challenging goal that involves many factors interacting each other in a way that still needs to be clearly modeled. At a first level of approximation, a preliminary analysis can be done by focusing ... fusion methods. However, in the metric design in [15] no information about the depth perception was taken into account. As outlined in Section 2, the lack of depth information can lead t...

Ngày tải lên: 22/06/2014, 00:20

... calibration and mitig ation of NLOS ranging errors are analyzed in [21, 22] and, in the specific UWB range estimation context, in [23]. An algorithm for ranging estima- tion in the case of an intermittently ... distance estimation er ror obtained from room F1, room P, room H, and room B. It summarizes the performance of the four algorithms at the optimum operating point...

Ngày tải lên: 22/06/2014, 23:20