Multipath Error Reduction in Signal Processing

The multipath error reduction methods described in this paper will give you an insight into further development of the so-called "strobe methods" that have been used in pseudo random noise (PRN) receivers since 1975 (see Ref.[1]). These methods already proved their high effectiveness in reducing tracking errors in spreadspectrum (PRN type) digital receivers (see Ref.[2-4]). However, it should be stressed here that they have some failings too, for example, the possibility for a DLL to lock on reflected signals, or problems due to very narrow DLL lock range. Hopefully we can now offer new techniques allowing engineers to reduce the failings inherent to the earlier strobe methods (these new techniques are patent pending). The idea of using strobes is based on replacing the 'regular' PRN-code replica in the receiver correlator with an alternative reference code replica built from a special series of strobes. In this paper, we will present a new effective strobe sequence and provide the reader with all the necessary theoretical information and experimental data on the expected noise and multipath errors. The new strobe sequence described below allows developers to compensate for the imperfections of the above mentioned strobe methods. It should be noted here that such progress can be achieved without making any complicated changes to the receiver design or increasing its power consumption.