您要查找的是不是：
- DSSS直序扩频Direct Sequence Spread Spectrum
- 直序扩频通信（DSSS）direct sequence spread spectrum (DSSS)
- 具有低截获概率的直序扩频系统A Low Probability of Intercept Direct Sequence Spread Spectrum Systems
- 直序扩频DSSS
- 直序扩频通信direct seqeuence spread spectrdm communication
- 直序扩频信号DSSS signal
- 直销direct marketing; door-to-door sale
- 直发straight hair
- 频数frequence
- 逆页序打印reverse print order
- 直的straight
- 主频dominant frequency
- 逆序negative sequence
- 直飞non-stop flight to
- 倍频frequency doubling
- 载频carrier frequency
- 直击uppercut
- 正序positive-sequence
- 直前right ahead
- 频点frequency point
