Software Rake Receiver Enhanced Gps System
نویسندگان
چکیده
Acceleration of semiconductor technologies has enabled incorporation of GPS receivers in small inexpensive hand held battery operated devices. As the size of chipsets for different communication protocols diminishes in size, building multi-protocol communication systems including GPS receivers has become not only attractive but also possible. A limitation of current approaches requires the Baseband (BB) processor to be implemented with hardware. Furthermore, if advanced techniques such as Rake receivers are desired to improve reception over multiple paths, significant additional hardware may be required. This presents both size and cost issues. In this paper we extend our work previously presented [1] by describing results for reflective environments by using a Rake receiver. The baseband processing, including the Rake receiver, is implemented entirely in software, using the Sandbridge Technologies Sandblaster Digital Signal Processor (DSP) platform. An advantage of a software approach is that differing algorithms may utilized in various environments. Using our software implementation we show that the link margin may be improved by 3dB using the Rake receiver.
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