A Multipath Extracting On Spread-Spectrum Communication With Space-Time Modulation Based On TK Algorithm

In spread-spectrum communication positioning system, the multi-path signal is always existing and unable to be eliminated. How to extracting its multi-path rapidly and real-timely is one of the key techniques in mobile communication positioning system. And what we do in this paper is to put forward an effective algorithm to estimate the sub-chip multi-path component of spread-spectrum positioning system with space-modulation and put it into practice.Firstly, we expound the principle of spread-spectrum positioning system with space-modulation and its operator's performance, and TK operator is also expounded. Secondly, we apply TK operator to the cross-correlation of received signal code and PN code to separate the multi-paths. It comes to a conclusion that TK operator can separate the multi-paths within less than the chip period accurately of spread-spectrum system with space-modulation by simulation. At last, we apply this algorithm to the practical signal collected by GPS tap, and from the result we can drop a conclusion the TK algorithm is practical.