基于捷变频的二次变频技术在通信发端中的应用

当今移动通信设备硬件的发展趋势是设备的外观小巧或者说可移动性足够高、通信效果足够好并且功耗足够低。这样就要求设计硬件时做到高集成度且低性能损耗。本文主要针对移动通信设备的发端中的变频方式的改良、器件的合理选用,以期提高设备集成度减少性能损耗并在实际设计中简化工作量甚至还可以降低成本。笔者结合实际工程,将文中提到的变频方式、使用的器件均通过FPGA以及基于FPGA的NIOS-II处理器的平台上成功测试验证。并成功应用于基于OFDM调制的窄带无线通信系统的数据发送。此类应用将在煤矿监控等领域的设备中广泛推广。

An Application of Dual Conversion Based on Frequency Agility in the Transmitter of Mobile Communication Device

The tendency of mobile communication hardware today is higher mobilability , higher performance and lower power consumption. In order to reach the achievement ,the design of the hardware should be highly integrated and lower performance loss. This paper is aimed at the method of frequency conversion and the selection of device in transmitter to increase the integration and reduce the performance loss. All methods and devices introduced in the article are well tested on the platform based on FPGA and its NIOSII-II processor. And it is successfully put in use in narrow-band wireless communication system＇s data transmission based on OFDM modulation. This application will be widely used in monitoring system of coal mine.