跳频扩频（FHSS）使用窄带承运人的变化在一个已知两种模式的发射机和接收机的频率。 Properly synchronized, the net effect is to maintain a single logical channel.正确同步，净效果是保持一个单一的逻辑通道。 To an unintended receiver, FHSS appears to be short-duration impulse noise.对于一个意想不到的接收端，FHSS似乎是短期的脉冲噪声。 Direct Sequence Spread Spectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted.直接序列扩频（DSSS）生成每个有点多余位模式进行传输。 This bit pattern is called a chip (or chipping code).此位模式被称为芯片（或缺口代码）。 The longer the chip, the greater the probability that the original data can be recovered.该芯片的时间越长，就越有可能的原始数据可以恢复的可能性。 Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can recover the original data without the need for retransmission.即使一个或多个位的芯片在传输过程中损坏，统计技术在无线电设备可痊愈，不会对转播需要的原始数据。 To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers.对于一个意想不到的接收器，扩频显示为低功率宽带噪声和被拒绝（忽略大多数窄带接收器）。