Direct Sequence Spread Spectrum (DSSS)
DSSS is a Code Division Multiple Access (CDMA) based approach with spreading sequences applied to continuous data streams through integer-based spreading value (2x, 3x, 4x, … 511x, 512x). Comtech’s DSSS can be used on any of the three (3) Low Density Parity Check (LDPC) families; High Performance (HP), Low Latency (LL) and Ultra-Low Latency (ULL). DSSS can be configured up to a maximum chip rate of 64 Mcps utilizing either 15th or 17th order polynomials, supporting up to 10,000 Gold Sequence Numbers (GSN) each. This enables the use of small antenna VSATs where minimizing adjacent satellite interference (ASI) is an important consideration. It can also be used to provide under the noise floor operation and/or strong resistance to jamming.