Small low powered digital transmitter for covert remote surveillance

A small low power portable transmitter for remote covert surveillance is disclosed. The transmitter includes a scrambler, forward error correction encoder, differential encoder, spread spectrum system and a modulator. The transmitter may be configured to transmit a single input signal or multiple input signals. The transmitter is powered by a portable single voltage power supply. All digital components of the transmitter may be implemented in a field programmable gate array and the transmitter may be easily modified to accommodate different applications.