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|United States Patent||7,746,761|
|Green||June 29, 2010|
Various example embodiments are disclosed herein. According to an example embodiment, an apparatus for use in a wireless transmitter may include a continuous phase modulation (CPM) sample generator configured to generate a group of constant envelope CPM modulated signal samples, a Fourier transform block configured to perform a Fourier transform on the group of constant envelope signal samples to generate an initial group of Fourier coefficients, a zero insertion block configured to generate an expanded group of Fourier coefficients by inserting one or more zeros in the initial group of Fourier coefficients, and an inverse Fourier transform block configured to perform an inverse Fourier transform on the expanded group of Fourier coefficients to generate a group of constant envelope time-domain samples and to map the constant envelope time-domain samples onto a group of orthogonal subcarriers for transmission.
|Inventors:||Green; Marilynn (Coppell, TX)|
Nokia Siemens Networks Oy
|Filed:||October 25, 2007|
|Current U.S. Class:||370/206 ; 370/208; 370/210; 370/335; 375/260; 375/295|
|Current International Class:||H04J 11/00 (20060101)|
|2005/0254416||November 2005||Laroia et al.|
|2007/0195740||August 2007||Bhushan et al.|
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