| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless signal transmitter adopting polar modulation whereby highly efficient power amplification can be performed even when a signal band is broadbanded. SOLUTION: When a baseband signal generator 101 receives a transmission data signal S100, digital signals b(-N), b(-N+1), ..., b(N) from which the transmission data signal S100 is separated for every frequency are inputted to an IFFT section 111 in parallel. On the other hand, 2N sets of multipliers 112 extracts correction coefficients a(-N), a(-N+1), ..., a(N) from a correction coefficient storing section 113 and multiply individual correction coefficients for the respective digital signals b(-N), b(-N+1), ..., b(N). In this case, the multipliers multiply correction coefficients with a small absolute value with digital signals with a low frequency component, and multiply correction coefficients with a greater absolute value according to digital signals with a higher frequency component. COPYRIGHT: (C)2008,JPO&INPIT
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