发明名称 METOD OCH ANORDNING FOER FREKVENSUTNYTTJANDE
摘要 The method involves communicating between different units which establish a bidirectional connection between them (FM-TX,FM-RX,AM-TX,AM-RX). The connections incorporate a first channel on which a first unit transmits and a second unit receives messages, and a second channel on which a second unit transmits and a first unit receive messages. The first channel (FM-TX) frequency-modulates, and the second channel (AM-TX) amplitude-modulates, with transmission and reception occurring on the common frequency. Transmission and reception occur at the same time on the respective channels. - Modulation insulation between the receiver and the transmitter and the respective insulation between the channels amounts to at least 50 dB. The total duplex insulation amounts to at least 100 dB. The outgoing signal to the antenna from the transmitter and the ingoing signal from the antenna to the receiver are sepd. in a fork function.
申请公布号 SE9203863(D0) 申请公布日期 1992.12.22
申请号 SE19920003863 申请日期 1992.12.22
申请人 TELEVERKET 发明人 S *NORDIN
分类号 H04B1/56 主分类号 H04B1/56
代理机构 代理人
主权项
地址