| 摘要 |
<p>A method, system and electronic device (100) for providing a partially encrypted data packet in a spread spectrum signal. The device has a spread spectrum signal encoder (140) having a data input, an output and a plurality of modulators (202,204,206) with inputs respectively coupled to outputs of a direct sequence generator (110), a scrambling sequence generator (120) and a carrier generator (125). There is also an output unit (150) coupled to an output of the spread spectrum signal encoder (140). In use when a data packet comprising a payload field of bits and non-payload field of bits is received by the spread spectrum signal encoder (140), the modulators (202,204,206) modulate the data packet to provide the partially encrypted data packet with the payload being a spread spectrum signal encrypted by a scrambling sequence from the scrambling sequence generator (120) and the non-payload field comprises a spread spectrum signal free of encryption by said scrambling sequence.</p> |
