Patent ID: 8588317

Claim:
A method comprising: forming, with a wireless communication device, blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols; applying, with the wireless communication device, a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, wherein the hopping code causes a position of the null subcarrier to change from block to block, wherein the position change caused by the hopping code is based, at least, on a block length and a cyclic prefix length, wherein the cyclic prefix length is based, at least, on an amount of multipath propagation in the wireless communication channel; and outputting, via N t antennas of the wireless communication device, a wireless transmission signal in accordance with the blocks of symbols, the wireless transmission signal being configured to be received via N r antennas, wherein each of N t and N r is an integer, and wherein at least one of N t and N r is an integer greater than one.