基于CSR8670的蓝牙耳机设计与实现

发布时间：2018-04-08 12:37

本文选题：蓝牙耳机　切入点：无线通信　出处：《东南大学》2015年硕士论文

【摘要】：蓝牙技术是’由爱立信公司最先提出的一种短距离无线通信技术,旨在取代电缆来连接便携式和固定设备,在各种数字设备之间实现灵活、安全、低成本和低功耗的话音和数据通信。目前,蓝牙耳机作为蓝牙技术的典型应用,往往在价格和性能上不能兼顾。本课题着眼于对蓝牙芯片及其相匹配软硬件的合理利用和优化,旨在研发出性能优良、价格亲民的中高端蓝牙耳机。蓝牙耳机是蓝牙技术、电路结构知识、软件开发和音频处理技术相结合的新型应用。本文先对蓝牙技术的核心协议和蓝牙耳机中所涉及的关键技术进行了深入的分析和理解,通过详细的性能价格对比选中CSR8670作为耳机的主芯片。设计了蓝牙耳机的硬件系统,实现了各个硬件模块功能,完成了天线、电池等重要器件的选型。深入研究蓝牙软件系统,并使用开发调试环境实现耳机功能,对蓝牙耳机的软件实现部分做了详细的步骤分析,通过协议的代码化实现了蓝牙耳机的具体工作过程。最后,论文给出了蓝牙耳机的测试过程与结果。所设计的电路经过验证可以有效工作。开发的蓝牙耳机也经过了测试和使用,实现了预期的功能,也符合设计时给出的性能指标。本论文工作难点在于,其一,蓝牙耳机成本高居不下,导致价格昂贵。本文中通过对芯片的合理使用和对器件的选型,大大的降低了中高端蓝牙耳机的制造成本。其二,蓝牙耳机在较长传输距离时的音频质量普遍不太理想。本文中通过天线部分的设计以及DSP降噪算法的处理得以在接近10m传输距离时也能拥有优异的音频表现。本论文中完成的蓝牙耳机,通过合理的芯片与器件选型,完善的软硬件设计,具有较好的音频质量,稳定的传输过程,在最大范围内降低了成本,对中高端蓝牙耳机在国内的应用有较好的推广作用。同时,本文对蓝牙技术的普及和进一步优化具有积极的意义。
[Abstract]:Bluetooth is a short-range wireless communication technology first proposed by Ericsson, which is designed to replace cables to connect portable and fixed devices, and to achieve flexibility and security between various digital devices.Low-cost and low-power voice and data communications.At present, Bluetooth headset as a typical application of Bluetooth technology, often in terms of price and performance can not be taken into account.This paper focuses on the reasonable use and optimization of Bluetooth chip and its matching software and hardware.Bluetooth headset is a new application of Bluetooth technology, circuit structure knowledge, software development and audio processing technology.In this paper, the core protocol of Bluetooth technology and the key technologies involved in Bluetooth headset are analyzed and understood deeply, and CSR8670 is selected as the main chip of headset through detailed performance and price comparison.The hardware system of Bluetooth headset is designed, the function of each hardware module is realized, and the selection of antenna, battery and other important devices is completed.The Bluetooth software system is deeply studied, and the headset function is realized by using the development and debugging environment. The software implementation part of the Bluetooth headset is analyzed in detail, and the concrete working process of the Bluetooth headset is realized by the code of the protocol.Finally, the testing process and results of Bluetooth headset are given.The designed circuit is proved to work effectively.The developed Bluetooth headset has been tested and used to achieve the expected function and meet the performance indicators given in the design.The difficulty of this paper lies in: first, Bluetooth headset cost is high, resulting in high price.Through the reasonable use of chip and the selection of devices, the manufacturing cost of middle and high-end Bluetooth headset is greatly reduced.Second, the audio quality of Bluetooth headset is generally not ideal at long transmission distance.In this paper, the design of antenna and the processing of DSP denoising algorithm can achieve excellent audio performance near 10m transmission distance.The Bluetooth headset completed in this paper, through reasonable chip and device selection, perfect hardware and software design, has better audio quality, stable transmission process, and reduces the cost in the maximum range.It can promote the application of middle and high-end Bluetooth headset in our country.At the same time, this paper has positive significance for the popularization and further optimization of Bluetooth technology.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN642

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