| 1. | Transmit channel center frequency
发射信道中心频率 |
| 2. | Specifications and measuring methods of digital transmit channel for master control system in tv center
电视中心播控系统数字.播出通路技术指标和测量方法 |
| 3. | The video conference system is composed of the terminal , the transmitting channel and mcu ( multipoint control unit )
会议电视系统主要由终端设备、传输信道(通信网)以及多点控制单元三部分组成。 |
| 4. | In transmit channel , power amplifier make the signal level more high in order to make electromagnetic wave transmit long distance
发射链路中,功率放大器对已调制信号进行功率放大,以保证更远的通信距离。 |
| 5. | Moreover , the canceling technology of two microwave signals with same frequency is applied in microwave rfid system firstly , and the method for improving the isolation between the transmitting channel and receiving channel is obtained
首次成功地将同频相消技术应用于微波rfid系统中，提出了阅读器收发通道隔离度的改进措施。 |
| 6. | This dissertion majored in dicussing the signal source and signal transmitting channel ’ s code and decoding of spectrum spread radio station under the concept of the software wirelss radio . the author ’ s main work and new ideas are listed blow : 1
本文主要讨论的是在软件无线电的构架下讨论和实现跳扩频电台的语音编解码以及信道上的编码和解码的理论和实现。 |
| 7. | This paper goes on with analysis of the phased array radar calibration theory and compare of different schemes , then the best is adopted . 2 mhz digital circuit mainly composed of dds ( direct digital synthesis ) chip , which carries out the shift of the phase and the limit of the amplitude , has been designed and debugged successfully . it is used to substitute for the conventional phased shift circuit and amplitude limiting circuit which work at the radio frequency , so the all - digital transmit channel of phased shift array radar is achieved
本论文研究的重点是：针对传统相控阵雷达系统收发( t r )组件中的移相和限幅功能均在射频段完成，大胆利用直接数字合成( dds )芯片组成频率在2mhz左右的数字电路代替传统相控阵雷达在射频段进行移相和限幅的电路，从而组成全数字发射通道，使对相位和幅度的控制和调试更方便快捷，并设计具体的电路验证此方案的可行性。 |
