multiple channel access的意思|示意

The operation of Dual Busy Tone Multiple Access(DBTMA) is based on the RTS/CTS packet and two narrow bandwidth, outofband busy tones. The RTS/CTS dialogue is used to reserve the channel.

双忙音多址接入（DBTMA）协议是采用RTS/CTS对话机制来预约信道，通过引入两个窄带带外忙音信号来避免分组间冲突，解决了隐藏终端和暴露终端问题。

Dynamic limited polling multiple access protocol based on waiting time of packets and channel state is proposed.

提出了基于分组等待时间和信道状态的动态限定轮询多址协议。

In DS CDMA channels with multipath and multiple access interference, this paper estimates blindly the user channel with extended space time channel model to process the blind MMSE detection.

在多径多址干扰DS CD MA环境中，本文根据空时信号模型，用扩展的盲方法估计用户信道，从而进行盲mmse检测。

In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception.

在CD MA移动通信系统中，多址接入干扰可以通过多用户检测技术来消除，而分集接收可以减小信道衰落的影响。

Then introduces the pulse waveform, the architecture of the UWB transceiver, the fading models of the signal, the indoor channel models, at last some multiple access systems are presented as follow.

接着介绍了超宽带的脉冲形成方式、调制方式、收发机系统结构、信号衰减模型、室内多径信道模型以及各种多址系统，为后面的章节做好铺垫。

Simulation results demonstrate that the proposed method offers higher detecting performance and is capable of combating both channel fading and multiple-access interference.

仿真结果验证了本文方法具有良好的检测性能，可以在克服信道衰落的同时抑制多址干扰。