Abstract: A communication system is disclosed that comprises first and second communication apparatus. The first communication apparatus is provided with a transmitter for each of the transmission paths, which are capable of sending at least part of a communication signal to the second communication apparatus. The first communication apparatus moreover comprises training mechanisms for generating a training code to be sent to the second communication apparatus enabling a receiver to match a received signal to a corresponding transmitted signal. According to the invention, a training code is used with at least nearly ideal cyclic auto-correlation properties such that its cyclic auto-correction function is at least nearly zero for all cyclic shifts. The transmitter concurrently sends a training code in a mutually shifted manner, while the receiver is capable of performing a cyclic auto-correlation with respect to a received training signal.

Abstract: A communication system comprises first and second communication means and a first transmission path as well as at least one further transmission path between said first and said second communication means. The first communication means are provided with transmission means for each of said transmission paths, which are capable of sending at least part of a communication signal to the second communication means. The first communication means moreover comprise training means for generating a training code to be sent to the second communication means enabling reception means to match a received signal to a corresponding transmitted signal. According to the invention a training code is used with at least nearly ideal cyclic auto-correlation properties such that its cyclic auto-correction function is at least nearly zero for all cyclic shifts.