| Patent application number | Description | Published |
|---|
| 20080240306 | CORRELATION DEVICE FOR PERFORMING CORRELATION ON A RECEIVED GLOBAL NAVIGATION SATELLITE SYSTEM SIGNAL AND METHOD FOR SAME - The invention provides a correlation device performing correlation on a received Global Navigation Satellite System (GNSS) signal. The correlation device comprises a first decimation module, a second decimation module, and a correlation module. The first decimation module decimates a plurality of samples of the received GNSS signal to obtain a plurality of decimated samples. The second decimation module decimates a plurality of code bits of a locally generated replica code to obtain a plurality of decimated code bits. The correlation module correlates the decimated samples with the decimated code bits to obtain a plurality of correlation results, thus achieving a coarse correlation between the received GNSS signal and the locally generated replica code. | 10-02-2008 |
| 20090013021 | VARIABLE LENGTH FFT SYSTEM AND METHOD - The present invention discloses a variable length fast Fourier transform (FFT) system and a method for performing the FFT system in a global navigation satellite system (GNSS) signal acquisition and tracking, which includes a memory and a number of processing elements. Based on the GNSS signal tracking, the variable length FFT system performs a first FFT operation together with a first data length. Based on the GNSS signal acquisition, the variable length FET system is divided into several FFT subsystems to simultaneously perform different operations with various data lengths different from the first data length. Thus, the variable length FFT system can enhance the hardware utility and increase throughputs. | 01-08-2009 |
| 20090195450 | GNSS RECEIVER AND METHOD FOR GNSS MEMORY CODE GENERATION - The invention provides a Global Navigation Satellite System (GNSS) receiver. In one embodiment, the GNSS receiver comprises a memory, a buffer, a correlator, and a selector. The memory stores a memory code and outputs a portion of the memory code as a first code segment. The buffer comprises a plurality of component buffers and stores the first code segment into one of the component buffers in order. The selector selects a portion of the first code segments stored in the buffer as a second code segment output to the correlator according to the code phase selection signal, wherein the data length of the second code segment is equal to a correlation data length of the correlator. The correlator calculates a correlation between a received GNSS signal with the correlation data length and the second code segment. | 08-06-2009 |
| 20090196377 | CORRELATION SYSTEM AND METHOD FOR GNSS RECEIVER - A correlation system for a GNSS receiver uses an FFT engine to perform correlation and post-FFT operation. The FFT engine executes FFT operation to an input data stream so as to generate a frequency-domain correlation with frequency-domain C/A code and IFFT operation to the frequency-domain correlation result to generate post correlation data for each hypothesis, and executes FFT operation to the post correlation data of a selected hypothesis to generate a post-correlation FFT result in a programmable TDM manner. In the present invention, in addition to the FFT engine, some components such as a magnitude calculation unit and memory are shared by a correlation stage and a post-correlation stage. Therefore, hardware complexity can be reduced. | 08-06-2009 |
| 20090196378 | POST CORRELATION SYSTEM FOR GNSS RECEIVER - A post correlation system for a GNSS receiver uses an FFT engine to perform post-FFT operation to obtain spectrum data. The system has a contender selector for sieving magnitude results of the spectrum data meeting some specific conditions for selected hypotheses. The sieved magnitudes results rather than all the magnitude results are stored into a memory. By doing so, the requirement of the memory capacity can be significantly reduced. | 08-06-2009 |
| 20090278247 | BONDING PAD SHARING METHOD APPLIED TO MULTI-CHIP MODULE AND APPARATUS THEREOF - A multi-chip module (MCM) includes a first die and a second die. The first die supports a plurality of predetermined functions. The second die is coupled to the first die and comprises at least an option pad configured for a bonding option. The first die performs a predetermined function according to a bonding status of the option pad of the second die. | 11-12-2009 |
| 20100195746 | BOC SIGNAL ACQUISITION AND TRACKING METHOD AND APPARATUS - A BOC signal acquisition and tracking apparatus and method. In the present invention, at least a BOC signal, a BOC-cos signal and a PRN coded signal are generated for a received signal. Depending on application condition (e.g. acquisition mode or tracking mode), autocorrelation of the BOC signal is combined with cross-correlation of the BOC signal and one of the BOC-cos signal and the PRN coded signal to generate a proper combined correlation result. | 08-05-2010 |
| 20110243199 | GNSS Receiver and Method for GNSS Memory Code Generation - A GNSS receiver and method for GNSS memory code generation are disclosed. The GNSS receiver comprises a buffer, a correlator, and a selector. The buffer receives and stores a plurality of first code segments. Each of the first code segment is at least a portion of a memory code. The selector selects a selecting window of the first code segments stored in the buffer as a second code segment according to the code phase selection signal. The correlator calculates a correlation between a received GNSS signal and the second code segment. | 10-06-2011 |
