An apparatus for estimating a channel from a transmitting point to a receiving point in an environment, in which at least two transmitting points spaced apart from each other are present, the transmitting point having associated therewith a pilot sequence, wherein the pilot sequences are different from...http://www.google.de/patents/US20050047518?utm_source=gb-gplus-sharePatent US20050047518 - Apparatus and method for estimating a channel
