| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission waveform shaping system in which waveform shaping is conducted at a high speed with high accuracy by eliminating a fact that a waveform shaping processing time is limited due to a read speed of data from a ROM storing waveform shaping data in the case of shaping waveform of a transmission signal to reduce undesired spread of a spectrum attended with a waveform change caused at frequency hopping. SOLUTION: Waveform shaping (attenuation) data stored in a waveform shaping data storage section 25 consisting of a ROM or the like are transferred to a RAM 21 via a data transfer section 26. The waveform shaping (attenuation) data are sequentially read from the RAM 21 by using a count output of a counter circuit 20 as an address. The read waveform shaping (attenuation) data are converted into an analog signal at an A/D converter 23 and fed to an electronic control attenuator 6 via an LPF(low pass filter) 24. A frequency hopping transmission signal that is waveformshaped by the electronic control attenuator 6 s amplified by a power amplifier 8 and the result is sent as an antenna power. |
