Gigabit impulse radio link using photonic signal-generation techniques

A gigabit wireless link system with an impulse radio scheme is presented. The link system employs a photonic-impulse signal-generation technique in the transmitter and a wideband down-conversion based on a square-law detection in the receiver. An impulse signal with a full-width-at-half-maximum of 22 ps was generated at a bit rate of 1.485 Gb/s. A data signal was regenerated from the impulse signal propagated in the free space. Error-free transmission with a word length of 2/sup 15/-1 was obtained at the received power of -36 dBm. High-definition television data transmission has also been successfully conducted.