Patent ID: 8774151
Filing Date: 2014-07-08
Classification: H04B,H04L

Abstract:
1. A transmitter comprising: a pre-coder configured to pre-code each of at least two data symbols using a respective pre-coding codeword to produce a corresponding plurality of pre-coded data symbols; a plurality of antennas, each configured to transmit a respective signal, each respective signal comprising one of the pre-coded data symbols and at least one pilot symbol for use in channel estimation; the signals collectively further comprising at least one beacon pilot vector consisting of a respective beacon pilot per antenna, the beacon pilot vector containing contents known to a receiver for use by the receiver in determining the codeword used to pre-code the at least one data signal, wherein each transmitted signal is an OFDM signal, and wherein for each antenna the respective signal comprises a null in each sub-carrier and time location used to transmit the at least one pilot symbol in the respective signal of each other antenna.