Real-time generation of bit-wise parallel representations of over-sampled PRN codes |
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Authors: | Psiaki ML |
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Affiliation: | Sibley Sch. of Mech. & Aerosp. Eng., Cornell Univ., Ithaca, NY, USA; |
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Abstract: | An algorithm has been developed that maps pseudo-random number codes onto a set of sample times and stores the results in a bit-wise parallel format. It allows bit-wise parallel software correlation of code-division multiple-access signals to be carried out using long pseudo-random number codes. Bit-wise parallel algorithms speed up software correlation by operating in parallel on multiple samples. The new algorithm uses table look-ups to over-sample a pseudo-random number code. It reduces the PRN code memory requirements of a GPS software receiver by a factor of 3.8 or more, maintains operational efficiency, and keeps code distortion low. |
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