| 摘要 |
PURPOSE:To prevent the phase deviation of a frequency signal at hopping by generating a reference cosine signal and using the sum signal of the result of multiplying cosine and sine wave signals generated by the hopping command with a reference wave and a delay signal by pi/2 respectively. CONSTITUTION:An oscillator 1 generates a reference wave being a cosine wave signal with a prescribed frequency. A frequency generating means 2 receives a command from a hopping commander 3 to generate a sine and a cosine signal with a prescribed frequency. The cosine signal outputted from the means 2 and the cosine signal from the oscillator 1 are multiplied by the multiplier 4 and the sinusoidal signal outputted from the means 2 and a signal being the result of deviating the phase of the cosine wave signal outputted from the oscillator 1 by pi/2 by a multiplier 6. The signals obtained from the multiplier 4 and 6 are added to apply spread spectrum communication. Thus, the phase deviation of the frequency signal at hopping is prevented in this way. |
