Patent ID: 7103115
Filing Date: 2006-09-05
Classification: H04L

Abstract:
1. An apparatus for communicating, comprising: a first transmit device that transmits a set of first training symbols; and a second transmit device that transmits a set of second training symbols; wherein a cross-correlation estimate between the set of first training symbols and the set of second training symbols is essentially zero, whereby a channel estimation is achieved without performing a matrix inversion; wherein the set of second training symbols is substantially identical to the set of first training symbols with a phase shift; wherein the set of second training symbols is related to the set of first training symbols according to: where t 1 [n, K] is the set of first training symbols, t 2 [n, k] is the set of second training symbols and where n is an Orthogonal Frequency Division Multiplexing (OFDM) block, k is an OFDM sub-band, K is a total number of OFDM sub-bands and l