Uncoordinated Direct Sequence Spread Spectrum

Definition

Uncoordinated direct sequence spread spectrum (UDSSS) is a spread spectrum communication scheme where the sender and the receiver communicate using secret spreading codes that they choose randomly and independently from a public set of channels. The receiver is unaware of the codes used by the sender to transmit the messages prior to their communication. It was introduced by Popper, Strasser and Capkun.

Background

Spread spectrum (SS) techniques represent a common way to achieve anti-jamming communication. Spread spectrum techniques use data-independent, random sequences to spread a narrowband information signal over a wide (radio) band of frequencies. Under the premise that it is hard or infeasible for an attacker to jam the entire frequency band, the receiver can correlate the received signal with a replicate of the random sequence to retrieve the original information signal. Anti-jamming communication is used in commercial and military applications, both between paired...