COMMUNICATION APPARATUS AND COMMUNICATION METHOD

摘要

A communication apparatus in which only a terminal having a specific positional relationship can perform communication through a relatively simple arrangement. When initial setting is performed or communication is started, a timing calculating section (104) calculates a time difference corresponding to the difference between a path from an antenna (101) to a terminal (200) and a path from an antenna (102) to the terminal (200), based on a transmission signal from the antenna (101) and a reflection signal provided by having the transmission signal reflected from the antenna (102) or a communication partner, i.e. the terminal (200), and returned back to the antenna (101). Based on the time difference thus calculated, the timing calculating section (104) outputs a signal for regulating the transmission timing of transmission data from the antenna (101) to a variable delay unit (105). The variable delay unit (105) delays transmission timing of the transmission data depending on the timing regulation signal and outputs the delayed transmission data to a modulating/demodulating section (106).