Patent ID: 8724610
Filing Date: 2014-05-13
Classification: H04B,H04J,H04L

Abstract:
1. A method, comprising: synchronizing pilot transmissions of a first group of wireless units, wherein each wireless unit of the first group of wireless units uses a different orthogonal pilot from a set group of orthogonal pilots; synchronizing pilot transmissions of a second group of wireless units, wherein each wireless unit of the second group of wireless units uses a different orthogonal pilot from the set of orthogonal pilots and wherein synchronizing the pilot transmissions of the second group of wireless units includes shifting in time the pilot transmissions of the second group of wireless units with respect to the pilot transmissions of the first group of wireless units; exchanging, between networking equipment, the pilot transmissions of the first group of wireless units and the pilot transmissions of the second group of the second group of wireless units; and determining a channel matrix between the networking equipment based on the exchanging.