| http://www.w3.org/ns/prov#value | - r interference signal suppression has been discussed comprehensively in the literature, so that the present invention, in using PN codes, can be especially well implemented. [0009] Preferably, the modulation of transmitting signals in the first specific embodiment is carried out by amplitude modulation, and the modulation of the signal in the receive branch is done by phase modulation.
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