| US 7,349,817 B2 | ||
| Apparatus and method for reducing peak-to-average power ratio in a broadband wireless communication system | ||
| Sung-Keun Cha, Seongnam-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., (Korea, Republic of) | ||
| Filed on Apr. 20, 2006, as Appl. No. 11/407,750. | ||
| Claims priority of application No. 10-2005-0032557 (KR), filed on Apr. 20, 2005. | ||
| Prior Publication US 2006/0247898 A1, Nov. 02, 2006 | ||
| Int. Cl. G01R 13/00 (2006.01) | ||
| U.S. Cl. 702—66 [702/60; 370/208; 370/210] | 24 Claims |
| 1. A wireless communication system for reducing the peak-to-average power ratio (PAPR) of a transmission signal, comprising:
a first calculator for detecting baseband samples having magnitudes exceeding a threshold, calculating intermediate scaling
factors (ISFs) for the detected samples, and setting the ISFs to ‘1’ for undetected samples;
a successive peak detector for determining whether each sample is a peak by checking the ISF of each sample, comparing the
spacing between a previous peak and each sample with a predetermined window size, if each sample is a peak, multiplying the
ISF of each sample by a weighting value, if the spacing is less than or equal to the window size, and outputting the ISF of
each sample it each sample is not a peak or the spacing is greater than the window size;
a second calculator for subtracting the ISF of each sample received from the successive peak detector from a predetermined
value to output a difference; and
a window convolution calculator for calculating a convolution of the difference received from the second calculator and a
predetermined window function, and outputting a window operation value of each sample.
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