Patent ID: 7965697
Filing Date: 2011-06-21
Classification: H04L

Abstract:
1. A signal generation apparatus comprising: a first rotation unit for generating a rotated complex symbol group by rotating a plurality of complex symbols in a plurality of different phase angles each corresponding to a plurality of complex symbols; a repetition unit for outputting a plurality of transmission chips by repeating the rotated complex symbol group at predetermined times; a second rotation unit for generating a plurality of transmission symbols by rotating the plurality of transmission chips in a plurality of phase angles included in an orthogonal phase sequence for respective users; and a digital modulation unit for generating the plurality of complex symbols by digital-modulating a plurality of data symbols in M phase angles, wherein the first rotation unit generates the rotated complex symbol group by rotating a k-th complex symbol among the plurality of complex symbols in a phase angle that is inverse-proportional to M and proportional to k.