JIMI Electronic

If you use a GPS receiver for your outdoor workouts, one of your biggest decisions will be how to carry the GPS receiver. The simplest way is just to hold it in your hand, if it’s free. Of the number of other different ways to carry a GPS receiver, the best carry methods will Provide optimal GPS satellite signal reception: Where you work out might dictate how you carry your GPS receiver. If you live on the plains (flat) without any trees and have excellent satellite reception, you have more options than in the Pacific Northwest (heavy tree canopies). Be comfortable : Carrying a GPS receiver should not distract you from your workout. However you carry it, it should be comfortable, and you really shouldn’t notice carrying or wearing it. Here are some different ways to carry a GPS receiver while working out. How you carry a GPS receiver usually ends up being a personal preference. Try a few of these methods to see which one works best for you. Armbands Armbands, especially w...

Because the scope of GPS research and application development is so broad and conducted by researchers all over the globe, it is impossible to give a comprehensive listing. Therefore, merely demonstrates the extraordinarily rapid development of the  GPS Solution  . GPS made its debut in surveying and geodesy with a big bang. During the summer of 1982, the testing of the Macrometer receiver, developed by C. C. Counselman at M.I.T., verified a GPS surveying accuracy of 1–2 parts per million (ppm) of the station separation. Baselines were measured repeatedly using several hours of observations to study this new surveying technique and to gain initial experience with GPS. During 1983 a thirty (plus)-station first-order network densification in the Eifel region of Germany was observed (Bock et al., 1985). This project was a joint effort by the State Surveying Office of North Rhein-Westfalia, a private U.S. firm, and scientists from M.I.T. In early 1984, the geodetic network densif...

In order to design and build a GPS receiver, the developer must understand the basic functional blocks that comprise the device, and the underlying hardware and software necessary to implement the desired capabilities. The sections below describe the main functional blocks of a GPS receiver, and the types of solutions that are either available today or in development to provide that functionality. The demand for the integration of positioning technology into smaller devices is challenging antenna development. The industry is already pushing for smaller antennas for applications such as a wristwatch with integrated GPS, which is smaller than most patch antennas available today. Another demand is for dual-purpose antennas that do double duty in wireless communication devices, such as in a mobile telephone with an integrated GPS receiver. Inevitably, the future will bring smaller and more flexible antennas for  GPS Tracking Device  . The function of the downconverter is to s...

GPS receivers are composed of three primary components: the antenna, which receives the radio frequency (RF) broadcasts from the satellites; the downconverter, which converts the RF signal into an intermediate frequency (IF) signal; and the baseband processor or correlator, which uses the IF signal to acquire, track, and receive the navigation message broadcast from each SV in view of the receiver. In most systems, the output of the correlator is then processed by a microprocessor (MPU) or microcontroller (MCU), which converts the raw data output from the correlator into the positioning information which can be understood by a user or another application. The sections below provide an overview of the three key components of a GPS receiver, describing in generic terms the functionality and capabilities typically found in these systems. As the capabilities of the MPU or MCU needed to process the correlator output is largely dependent on the needs of the applications and the particular...