多速率软件无线电数字中频系统的研究与实现

发布时间：2018-11-21 06:43

【摘要】：当前,移动通信技术的迅猛发展,促使传统的基于专用硬件的通信设备所固有的功能单一、不易升级改造的缺点突显出来,导致多种通信协议在兼容和版本升级方面的问题日益严重。而软件无线电技术由于自身的灵活性和开放性,可以很好地解决这些问题。在此基础上,对多速率数字中频系统中的关键技术进行了研究和实现。系统设计为全双工模式,支持多速率收发处理,可根据实际应用的需要进行配置,从而实现多种数据速率的转换。系统主要包括混频器模块、采样率变换(插值和抽取)模块、低通滤波器模块。功能上实现了32、96、480倍的降/升采样处理和240kHz的信号下变频处理,且阻带衰减可以达到60dB,有效地对杂散信号进行了抑制。在灵活配置的系统前提下,对模块进行了优化和复用,不仅节省了硬件开销,而且提高了系统性能。
[Abstract]:At present, with the rapid development of mobile communication technology, the shortcomings of the traditional communication equipment based on special hardware, such as single function and not easy to upgrade and transform, are highlighted. As a result, many communication protocols are becoming more and more serious in compatibility and version upgrading. Because of its flexibility and openness, software radio technology can solve these problems well. On this basis, the key technologies of multi-rate digital if system are studied and implemented. The system is designed in full duplex mode and supports multi-rate transceiver processing. It can be configured according to the needs of practical applications, so as to realize the conversion of various data rates. The system mainly includes mixer module, sampling rate conversion (interpolation and decimation) module, low pass filter module. The downgrade / liter sampling processing and downconversion processing of 240kHz signal are realized, and the stopband attenuation can reach 60 dB, which can effectively suppress the stray signal. On the premise of flexible configuration, the module is optimized and reused, which not only saves the hardware cost, but also improves the system performance.
【作者单位】：湖南大学物理与微电子科学学院;中国科学院微电子研究所;
【基金】：中国科学院国防科技创新重点部署项目(KGFZD-125-13-010)
【分类号】：TN713;TN92

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