《Householder Multistage Wiener Filter for Space-Time Navigation Receivers》.pdf

I. INTRODUCTION High precision satellite navigation systems such as Householder Multistage Galileo and GPS [1] are important in many modern civilian and military applications. A GPS receiver Wiener Filter for Space-Time demodulates the signals from at least four satellites and uses the signals to calculate the distance to Navigation Receivers the satellites and consequently the position of the user. In many applications, such as safety of life, aircraft and vessel navigation as well as military applications, the receiver must be able to operate in the presence of severe interference or jamming. STEFAN WERNER, Member, IEEE The signal powers employed in GPS are so low that navigation receivers are very vulnerable to RF MATIAS WITH, Student Member, IEEE interference [1]. The GPS employs the principles VISA KOIVUNEN, Senior Member, IEEE of spread spectrum communications to navigation. Helsinki University of Technology The despreading gain of the GPS signal provides