Patent ID: 8428175
Filing Date: 2013-04-23
Classification: H04B

Abstract:
1. A method for transmitting a communications training sequence, the method comprising: generating a training sequence in a quadrature modulation transmitter, the training sequence representing at least a first symbol representing a first complex value immediately followed by a second symbol representing a second complex value immediately followed by a third symbol representing a third complex value, wherein the first complex value and the second complex value define a first angle, wherein the second complex value and the third complex value define a second angle, and wherein the first angle and second angle are equal and less than 180 degrees; transmitting the training sequence in a manner that energizes an in-phase (I) modulation path but not energizing a quadrature (Q) modulation path for a first time, and energizing the Q modulation path but not energizing the I modulation path for a second time different from the first time; generating an unbalanced message that contains data; and transmitting the unbalanced message, either before, after, or concurrently with the training sequence, the unbalanced message comprising a message format signal indicating how the training sequence is sent relative to the unbalanced message.