Patent ID: 8730877

Claim:
An apparatus comprising: a first processor adapted to arrange a total number of available subbands into a plurality of predetermined sets of subbands that collectively constitute the total number of available subbands, partition a set of subbands among the plurality of sets of subbands into a plurality of subsets of the set of subbands, wherein each of said subsets contains at least two subbands; generate a first sequence of pilot symbols for transmission in a subset of the set of subbands among the plurality of subsets of the set of subbands, the first sequence of pilot symbols being orthogonal to and configured to interlace with a second sequence of pilot symbols generated in a second processor for transmission in a further subset of the set of subbands among the plurality of subsets of the set of subbands, wherein at least one of the pilot symbols of the first sequence is generated for transmission simultaneously on the at least two subbands of the associated subset, and generate a first sequence of data symbols, the first sequence of data symbols being non-orthogonal to a second sequence of data symbols generated in the second processor; and a transmitter coupled to the first processor for transmitting the first sequence of pilot symbols and the first sequence of data symbols.