Patent ID: 8059697
Filing Date: 2011-11-15
Classification: H04B,H04J,H04L

Abstract:
1. A method for generating a radio signal in a transmitter with a reduced peak-to-rms ratio using multiple access codes to carry multiple, multi-bit data symbols, said method comprising the steps of: determining a number of the multiple access codes to carry the data symbols; dividing, by a bit grouper, a group of bits into a number of subgroups that is less or equal to twice the number of the multiple access codes; using each subgroup of bits to select, by a plurality of chip value generat devices, one of a number of In-phase or Quadrature signal values, where at least one pair of said selected signal values had been modified by performing an axis rotation in a plane of the selected pair of signal values to obtain rotated signal values; multiplying each access code with a complex signal value including one of said In-phase values and one of said Quadrature values or of one of said rotated In-phase values and one of said rotated Quadrature values to obtain a set of modulated chips for each access code; and adding corresponding chips of each access code to obtain a multicode signal.