DESCRIPTION OFDM MODULATED WAVE TRANSMITTER APPARATUS, OFDM MODULATED WAVE TRANSMISSION METHOD, AND PROGRAM TECHNICAL FIELD [0001] The present invention relates to an orthogonal frequency division multiplex (OFDM) modulated wave transmitter apparatus in which a transmission power amplifier (PA) is embedded, an OFDM modulated wave transmission method, and a program. BACKGROUND ART [0002] An OFDM scheme uses a plurality of narrowband subcarriers and modulates the narrowband subcarriers to transmit a signal. Therefore, the OFDM scheme, whose frequency spectrum is close to a square shape as a whole, obtains high frequency utilization efficiency. In addition, the OFDM scheme is robust against a delayed wave because a symbol length is long as compared to a single carrier scheme. Further, the OFDM scheme can be robust within a multipath environment by adding a guard interval (GI). [0003] In addition, in an orthogonal frequency division multiple access (OFDMA) scheme using the OFDM scheme, it is possible to simultaneously transmit information to a plurality of communication partners by allocating subcarriers to a plurality of information transmission destinations. [0004] In an integrated services digital broadcasting-terrestrial (ISDB-T) scheme, which is a terrestrial digital television broadcasting scheme in Japan, a band segmented transmission-OFDM (BST-OFDM) scheme is adopted. In the BST-OFDM scheme, it is possible to select more appropriate settings (a radio modulation scheme, transmission power, and the like) according to a purpose, by dividing subcarriers of the OFDM scheme into groups called segment and allocating the segments to each purpose. [0005] Further, in a long term evolution (LTE) system designed by Third Generation Partnership Project (3GPP), the OFDMA scheme is adopted for downlink from a base station to a mobile station and a single carrier-frequency division multiple access (SC-FDMA) scheme based on discrete Fourier transform (DFT)-spread OFDM is adopted for uplink from the mobile station to the base station. [0006] In the SC-FDMA scheme based on the DFT-spread OFDM, a time waveform of a symbol sequence to be transmitted, is subjected to a DFT and then designated as an input of the OFDM scheme. Frequency components of the symbol-sequence time waveform to be transmitted, which are DFT output input to OFDM, may be allocated to subcarriers indicated in advance from the base station in subcarrier mapping. The number of allocated subcarriers is set according to demand, and not all subcarriers are constantly allocated. [0007] The OFDM scheme is multicarrier transmission comprised by many subcarriers. An OFDM signal, which is an output of the OFDM scheme, has high peak power when 5 peak values of subcarriers overlap. An example of a baseband OFDM signal waveform is illustrated in FIG. 6. When the OFDM signal as described above is input to a PA having non-linearity characteristics, undesirable characteristic degradation, such as degradation of transmission characteristics or the increase of out-of-band radiation, is caused. Therefore, a PA having low non-linear distortion characteristics is needed for an OFDM modulated wave transmitter apparatus. [0008] Generally, in case of a comparison under the same output power, an amplifier having higher saturation output power characteristics has lower non-linear distortion characteristics. However, the amplifier as described above is not preferable in terms of the power efficiency because power consumption is high during a small signal of which non-linear distortion is not problematic. Consequently, it is necessary to improve the non-linear distortion characteristics without degrading the power efficiency. [0009] To reduce the non-linear distortion in OFDM, a scheme of improving linearity during peak power generation is proposed, for example, in Patent Document 1. In the scheme of improving the linearity during the peak power generation, the linearity is improved by temporarily applying a high voltage or a large current to the PA when high peak power is generated. This scheme can improve transmission characteristics and out-of-band radiation characteristics of an OFDM signal in a range not exceeding a maximum rating of a component of a high-power amplifier and a range that does not adversely affect reliability. [Documents of the prior art] [Patent documents] [0010] [Patent Document 1] Japanese Unexamined Patent Application, First Publication, No. 2001-292034 DISCLOSURE OF INVENTION Problem to be Solved by the Invention [0011] However, there are the following problems in the scheme of improving the linearity during the peak power generation according to Patent Document 1 described above. [0012] The first problem is that a circuit scale increases. This is because it is necessary to additionally provide an analog/digital (A/D) conversion circuit, which performs A/D conversion again of an analog signal, to which concerted once from an OFDM signal generated by digital signal processing, and the result of the A/D conversion is used for control. [0013] The second problem is that a circuit is weak against noise and interference from the environment. This is because an analog circuit, which is weak against noise as compared to a digital circuit, is used to perform the A/D conversion again of an analog signal, to which converted from an OFDM signal generated by digital signal processing, and the result of the A/D conversion is used for control. In particular, because the power of an output of a transmitter is usually high, it is necessary to take measures so that the output does not cause interference. Accordingly, it is preferable that the OFDM signal generated by digital signal processing is processed as a digital signal. [0014] The third problem is that power consumption is large when the OFDM signal has been processed as the digital signal. This is because the power consumption is increased due to the use of many digital arithmetic operations. In particular, there is a problem in that the power efficiency is not improved in a scheme in which states of use of subcarriers are non-uniform, as the BST-OFDM scheme or the SC-FDMA scheme based on DFT-spread OFDM. This is because, when the states of use of the subcarriers are on-uniform, a state of use of each subcarrier is not identified so that it is impossible to process suitably for a state of use of an individual subcarrier and, as a result, power consumption is not reduced. [0015] The fourth problem is a cost increase caused by an increase of circuit scale, taking measures against noise and interference, and an increase of power consumption as described above. [0016] The present invention has been made in view of such circumstances, and an object of the invention is to provide an OFDM modulated wave transmitter apparatus, an OFDM modulated wave transmission method, and a program, which can reduce a circuit scale, be robust against noise and interference from the environment, reduce power consumption, and be implemented at a low cost. Means for Solving the Problem [0017] According to the present invention for solving the above-described problems, there is provided an OFDM modulated wave transmitter apparatus including: an OFDM symbol signal generating circuit for generating an OFDM symbol signal from transmission data; an OFDM signal generating circuit for generating an OFDM modulated wave signal from the OFDM symbol signal; a control circuit for generating a power supply (PS) control signal and a PA control signal from the OFDM symbol signal; a converter for controlling an output voltage of a PS based on the PS control signal generated by the control circuit; and an amplifier for amplifying and outputting the OFDM modulated wave signal generated by the OFDM signal generating circuit based on at least one of the output voltage controlled by the converter and the PA control signal generated by the control circuit. [0018] In addition, according to the present invention, there is provided an OFDM modulated wave transmission method including: a first step of generating an OFDM symbol signal from transmission data; a second step of generating an OFDM modulated wave signal from the OFDM symbol signal; a third step of generating a PS control signal and a PA control signal from the OFDM S}mbol signal; a fourth step of controlling an output voltage of a PS based on the PS control signal; and a fifth step of amplifying and outputting the OFDM modulated wave signal based on at least one of the controlled output voltage and the PA control signal. [0019] In addition, according to the present invention, there is provided a program for causing a computer for controlling an OFDM modulated wave transmitter apparatus to execute: an OFDM symbol signal generating function of generating an OFDM symbol signal from transmission data; an OFDM signal generating function of generating an OFDM modulated wave signal from the OFDM symbol signal; a control function of generating a PS control signal and a PA control signal from the OFDM symbol signal; a converting function of controlling an output voltage of a PS based on the PS control signal; and an amplifying function of amplifying and outputting the OFDM modulated wave signal based on at least one of the controlled output voltage and the PA control signal. Effect of the Invention [0020] According to the present invention, it is possible to reduce an arithmetic operation amount and a circuit scale necessary for an arithmetic operation and hence reduce power consumption by employing a digital circuit, which is added to improve the power efficiency and non-linear distortion of an amplifier and increases resistance against noise and interference, and cutting down a digital arithmetic operation. BRIEF DESCRIPTION OF THE DRAWINGS [0021] FIG. 1 is a block diagram illustrating an OFDM modulated wave transmitter apparatus according to a first embodiment of the present invention. FIG. 2 is a block diagram illustrating a modified example according to the first embodiment of the present invention. FIG. 3 is a block diagram illustrating an OFDM modulated wave transmitter apparatus according to a second embodiment of the present invention. FIG. 4 is a block diagram illustrating an OFDM modulated wave transmitter apparatus according to a third embodiment of the present invention. FIG. 5 is a block diagram illustrating an OFDM modulated wave transmitter apparatus according to a fourth embodiment of the present invention. FIG. 6 is a conceptual diagram illustrating an OFDM baseband signal waveform in an OFDM modulated wave transmitter apparatus. EMBODIMENTS FOR CARRYING OUT THE INVENTION [0022] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. [0023]