Patent ID: 8767873

Claim:
A method of communicating over one or more space-time streams, the method comprising: transmitting a precoded portion of a first stream with a bandwidth of 1 MHz or less; transmitting, when there are at least two streams, a precoded portion of a second stream with a cyclic shift delay, relative to the first stream, of 4 μs; transmitting, when there are at least three streams, the precoded portion of the second stream with a cyclic shift delay, relative to the first stream, of 4 μs, and a precoded portion of a third stream with a cyclic shift delay, relative to the first stream, of 1 μs; and transmitting, when there are at least four streams, the precoded portion of the second stream with a cyclic shift delay, relative to the first stream, of 4 μs, the precoded portion of the third stream with a cyclic shift delay, relative to the first stream, of 1 μs, and a precoded portion of a fourth stream with a cyclic shift delay, relative to the first stream, of 5 μs.