Patent ID: 9310489
Filing Date: 2016-04-12
CPC Classification: G01S,H04W

Claim Text:
1. A positional information transmitter comprising: a radio transmitter configured to transmit repeatedly a positional information signal from a plurality of antennas spaced apart from each other, the positional information signal compatible with a satellite positioning signal that is a radio signal for positioning transmitted from an artificial satellite, the positional information signal being a radio signal containing position data indicative of a particular position, the positional information transmitter signal informing a communication terminal of the particular position specified by the position data when the communication terminal receives the positional information signal, the radio transmitter configured to transmit from each of the antennas through one of a plurality of channels the positional information signal containing the position data, the positional information signal being transmitted either simultaneously from the antennas through channels of the plurality of channels which are different between the antennas or sequentially in a time-shifted manner from one antenna to another antenna through any one of the plurality of channels, wherein the radio transmitter comprises a plurality of mixers corresponding to the antennas, respectively, and each of the mixers is configured to mix two signals to generate the positional information signal to be transmitted from the corresponding antenna, each of the two signals being generated by sampling a transmission bit string containing the position data at a different sampling period and modulating the sampled transmission bit string into a carrier wave in a predetermined frequency band.