所谓双向传输，指的是系统既可以从前端向用户发送信息，即下行传输，又可以实现用户向前端发送信息，即上行传输。
双向传输线 two-action line
双向传输线路 reversible link
双向传输视音频光端机 Fiberlink Flex
红外传输双向选择 Duplex Select
半双向传输 half-duplex transmission
同频双向传输 Transfer in the same frequency
双向传输系统 bidirectional transmission system
双向传输数据线路 bedirectional transmission data line
光纤双向传输系统 fiber-optic bi-directional transmitting system
HFC duplex transmission systems is a novel network transmission mode, which develop rapidly with the demand for value-added services of CATV and enables television transmission network system transformed fully from simplex into duplex.
有线电视HFC双向传输系统,是随着CATV增值业务的需求,单向电视传输系统面临全面改造成双向网络的现状,迅速发展起来的一种新型网络传输形式。
参考来源 - 基于DSP的HFC反向通道噪声监控系统的设计及实现As to bi-direction transmission protocol, this thesis derived the mathematical expression of saturation throughput of EDCA system with bi-direction transmission and A-MPDU, using the modified Markov model.
对于双向传输协议，本文利用修正的Markov模型，对采用A-MPDU和双向传输的EDCA系统，推导了饱和吞吐量表达式。
参考来源 - 无线局域网IEEE802.11n高吞吐量MAC层关键技术研究The control signal is transmitted as an AC component imposed on power signal, which realizes the bidirectional transmission.
数据信号作为交流分量叠加在直流分量上,然后传输到光供电远端实现双向传输。
参考来源 - 光供电及光操控传感系统·2,447,543篇论文数据，部分数据来源于NoteExpress
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