Patent ID: 9716536
Date: 2017-07-25
CPC Classifications: H04B

Claim:
1. A method for communicating data from a transmitter to a receiver in a wireless communication network, comprising: modulating time series data symbols using a coded modulation to produce time series modulated symbols; precoding the time series modulated symbols using a precoder matrix to produce precoded symbols, wherein the precoder matrix is formed using a rotation matrix including phase angles for at least some elements of the rotation matrix with values determined according to a parametric function of indices of the elements storing the phase angles, wherein the rotation matrix is a diagonal matrix, wherein the precoder matrix is formed using a product of the rotation matrix with at least one unitary transform matrix, wherein the phase angles on a diagonal of the rotation matrix are monotonically increasing or decreasing, and wherein the function of indices is a power function, such that the monotonically increasing or decreasing phase angles are formed according to the power function as where θ_k is the k-th phase angle in θ, π=3.14 . . . is a mathematical constant, α is a scale factor, and β is an exponent factor, wherein the scale parameter and the exponent parameter are pre-determined such that the precoded symbols reduce a bit error rate (BER) for the transmitting; forming data packets using the precoded symbols; and transmitting the data packets over the wireless network, where at least some steps of the method are performed by the transmitter.