GPS - đường dẫn quán tính và hội nhập P4

... Sons, Inc. Print ISBN 0-4 7 1-3 5032-X Electronic ISBN 0-4 7 1-2 007 1-9 4.1.2Frequency Downconversion and IF Ampli®cation After ampli®cation in the receiver front end, the GPS signal is converted ... Typical high-end receivers use anywhere from 1.5-bit (three-level) to 3-bit (eight- level) sample quantization. Three-bit quantization essentially eliminates the SNR degradation foun...

Ngày tải lên: 07/11/2013, 19:15

... position [63, 96, 98]. 1.2.2 Local-Area Differential GPS Local-area differential GPS (LAGPS) is a form of DGPS in which the user's GPS receiver also receives real-time pseudorange and, possibly, ... DIFFERENTIAL AND AUGMENTED GPS 1.2.1 Differential GPS Differential GPS (DGPS) is a technique for reducing the error in GPS- derived positions by using additional data from a refe...

Ngày tải lên: 28/10/2013, 22:15

... Andrews Copyright # 2001 John Wiley & Sons, Inc. Print ISBN 0-4 7 1-3 5032-X Electronic ISBN 0-4 7 1-2 007 1-9 There are other ground-based radiowave signal systems suitable for use as part of an ... by LORAN-C signals produced by three or more long- range navigation (LORAN) signal sources positioned at ®xed, known locations for outside-the-building location determination. A LOR...

Ngày tải lên: 28/10/2013, 22:15

... 2001 John Wiley & Sons, Inc. Print ISBN 0-4 7 1-3 5032-X Electronic ISBN 0-4 7 1-2 007 1-9 called the P-code, which has a 10.23-MHz chipping rate and a one-week period. The mathematical model of the ... is called the Y-code. The Y-code is formed by multiplying the P-code by an encrypting code called the W-code. The W-code is a random-looking sequence of chips that occur at a 511...

Ngày tải lên: 07/11/2013, 19:15

... John Wiley & Sons, Inc. Print ISBN 0-4 7 1-3 5032-X Electronic ISBN 0-4 7 1-2 007 1-9 Time and frequency users may see greater effects in the long term via commu- nication systems that can realize ... t τ Cross-correlation with received C/A-code Cross-correlation with received C/A-code Multipath-mitigating reference code waveform τ 0 T c T c – T c – 0 T c T c T c Fig. 5.5 Multip...

Ngày tải lên: 07/11/2013, 19:15

... Weill, Angus P. Andrews Copyright # 2001 John Wiley & Sons, Inc. Print ISBN 0-4 7 1-3 5032-X Electronic ISBN 0-4 7 1-2 007 1-9 where v is the vector velocity of the body in the rotating coordinate frame, ... the steam catapult. 4. GPS- aided alignment, using position matching with GPS to estimate the alignment variables. It is an integral part of integrated GPS= INS impleme...

Ngày tải lên: 15/12/2013, 03:15

... locally level earth-®xed coordinates, even though the sensors measure components in vehicle-body-®xed coordinates. In similar fashion, the Kalman ®lter state variables for GPS- only navigation must ... 7.59 is the discrete-time dynamic system model corresponding to the continuous-time dynamic system model of Eq. 7.51. The matrix F kÀ1 (de®ned in Eq. 7.60)in the discrete-time model (Eq. 7.59)...

Ngày tải lên: 15/12/2013, 03:15

... Weill, Angus P. Andrews Copyright # 2001 John Wiley & Sons, Inc. Print ISBN 0-4 7 1-3 5032-X Electronic ISBN 0-4 7 1-2 007 1-9 3. Exponential decay of the autocorrelation functions is a reasonable indication of ... multiply-and-accumulate operations per up- date cycle [10, p. 104, plus decorrelation], and that of the predictor step (temporal update) will be on the order of n2n...

Ngày tải lên: 15/12/2013, 03:15

... DETERMINATION 283 9.2 LADGPS, WADGPS, AND WAAS 9.2.1 Description of Local-Area DGPS (LADGPS) LADGPS is a form of DGPS in which the user's GPS receiver receives real-time pseudorange and, possibly, ... s 2 H T H À1 : 284 DIFFERENTIAL GPS 9 Differential GPS 9.1 INTRODUCTION Differential GPS (DGPS) is a technique for reducing the error in GPS- derived positions by using additiona...

Ngày tải lên: 15/12/2013, 03:15

... pháp và việc tuyển sinh đáp ứng nhu cầu xã hội. Từ năm 2007 đến nay, Bộ GD - ÐT đã cùng các bộ, ngành và các doanh nghiệp tổ chức nhiều hội thảo quốc gia về đào tạo theo nhu cầu xã hội. Mỗi hội ... 1.1 .Tính cấp thiết của đề tài Toàn cầu hoá và hội nhập kinh tế quốc tế đã mở ra một thời kì cho sự phát triển của thế giới. Toàn cầu hoá kinh tế đã dẫn đến quốc tế...

Ngày tải lên: 30/03/2014, 08:20