摘要
本文以电话网的G3传真通信技术和CDMA无线蜂窝移动通信技术为基础,对CDMA无线传真数据业务进行研究。为了对传真通信的控制更加灵活,更好地适应复杂的无线环境,本文提出CDMA无线传真数据业务中的模拟传真业务的系统解决方案。在对CDMA无线模拟传真通信系统解决方案分析的基础上,本文重点阐述CDMA无线模拟传真接入终端的软硬件设计和实现。详细阐述CDMA无线模拟传真接入终端硬件利用MSM5105芯片组和传真MODEM CX06827等芯片的设计和实现过程;结合TIA/EIA IS707A.7协议和TIA/EIA 578协议给出了模拟传真模块的设计和具体的模拟传真流程实现,解决流控、定时器等一系列问题。实验表明,本终端具有很好的系统兼容性,传真的成功率和质量达到了预期的效果。最后,总结当前系统使用情况和存在的不足,并指出今后努力的方向。
Based on PSTN (Public Switched Telephone Network) G3 fax communication technology and CDMA (Code Division Multiple Access) cellular mobile communication technology, CDMA wirless fax data service is researched in this article. In order to make the fax communication control more flexible and more adaptive to complex wireless environment, a system solution of analogy fax service of CDMA wireless fax data services is presented in the article. On the basis of analysis about system solution of CDMA wireless analogy fax communication system, as the article key, the design and implementation of CDMA wireless analogy fax accessing terminal is elaborated on. The design and implementation of hardware of CDMA wireless analogy fax terminal is expatiated on, which makes use of MSM5105 chipset and fax MODEM CX06827 chip.Based on TIA/EIA IS707A.7 protocol and TIA/EIA 578 protocol, the design of analog fax module and the particular analog fax flowchart are described with the solution of flow control and timer. The experiment shows that the terminal equipment has good system compatibility and fax success ratio and quality has achieved the anticipated effect. Finally, summarize the current system service condition and the existence insufficiency, point out the direction hard in the future.
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