GPS receivers and garments containing GPS receivers and methods for using these GPS receivers

DETAILED DESCRIPTION The present invention provides a GPS receiver having multiple GPS antennas which are coupled to one digital memory or several digital memories in order to store digitized signals which are obtained through the multiple GPS antennas.
A digital processor is coupled to the digital memory or memories in order to process the digitized signals.
When an embodiment of the present invention includes two GPS antennas which provide first and second digitized signals, the digital processor will typically process the first digitized signals to provide a first position information, such as a pseudorange, and process the second digitized signals to provide a second position information.
Then, the processor will typically determine which position information has the lower error and select that position information as the proper position information which indicated the position of the GPS receiver.
In a typical embodiment of the present invention, the digital processor will process the first and second digitized signals by performing fast convolution operations.
In one embodiment, the digital processor will perform a preprocessing operation on the first digitized signals to provide first results for the first digitized signals and perform a fast convolution operation on the first results to provide second results for the digitized signals and then perform a post processing operation on the second results to provide a third result for the first digitized signals which may then be used to provide a pseudorange from the first digitized signals.
Similarly, these operations are also performed on the second digitized signals and a comparison is made between the results obtained from the first digitized signals and the second digitized signals in order to select the position information having the lower error.
In one embodiment of the present invention, selected position information is then transmitted through a transmitter which is typically coupled to the digital processor and a communication antenna