一种高频带利用率调制方式的芯片设计

发布时间：2018-01-18 01:25

本文关键词：一种高频带利用率调制方式的芯片设计　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着通信技术的发展以及各个领域对信息传输速率的要求不断提高,作为重要的不可再生资源,无线电频谱的有限性和稀缺性日益显现。在通信工程领域,怎样更好的提高频谱利用率已经成为备受关注的课题。作为超窄带(UNB)调制技术的一种,拓展的二元相移键控(EBPSK)调制方式通过压缩传输信号带宽,可以极大提高频谱利用率,具有很大的潜力。本论文采用TSMC 0.18 μm CMOS工艺,设计覆盖200MHz到2.4GHz载波频率的EBPSK调制电路。系统结构由巴伦、模式选择电路、控制模块、相位键控电路及输出缓冲组成,实现三种工作模式：反相调制,缺周期调制(MCM)以及窄脉冲调制,三种调制模式可通过外部信号加以选择。其中,巴伦电路采用有源结构避免使用电感,有效减小电路面积,缩减流片成本；相位键控模块采用双平衡结构减小时钟馈通及电荷注入等非理想效应：由于基带信号未经滤波,故已调信号中含有较多的高频分量,在输出缓冲电路中采用电感并联峰化技术提高带宽从而提高信号的保真度。后仿真结果表明,当载波频率介于200MHz到2.5GHz之间时,电路满足各项指标要求。芯片采用在片和键合两种方式进行测试,结果显示芯片均可正确实现三种调制功能且三种调制模式可通过外部控制信号加以选择,功耗小于60mW,芯片面积为0.70×0.68mm2。
[Abstract]:With the requirement of the information transmission rate of the development of communication technology and various fields continue to improve, as an important non renewable resources, limited and scarce radio spectrum is becoming increasingly obvious. In the field of communication engineering, how to better improve the spectrum utilization has become the concern of the subject. As a super narrow band (UNB) modulation the expansion of the two phase shift keying (EBPSK) modulation by compression and transmission of signal bandwidth, can greatly improve the spectrum utilization, has great potential. This paper uses TSMC 0.18 m CMOS process, designed to cover the 200MHz to EBPSK modulation circuit 2.4GHz carrier frequency. The system is composed of Balun, mode selection circuit, control module, phase keying circuit and an output buffer, three work mode: phase modulation, short cycle modulation (MCM) and narrow pulse modulation, three modulation modes by Part of the signal to be chosen. Among them, the active balun circuit structure to avoid the use of inductor, effectively reduce the circuit area and reduce chip cost; phase keying module adopts double balanced structure reduce the clock feedthrough and charge injection and other non ideal effects: the baseband signal without filtering, so it has high frequency component in the signal contains more, the inductive shunt peaking technology in the output buffer circuit to improve the bandwidth to improve the fidelity of the signal. The results of simulation show that, when the carrier frequency is between 200MHz to 2.5GHz, the circuit could meet the requirements. The chip is tested by two ways in the film and key results show that the chip can achieve the right three modulation the function and the three kinds of modulation mode can be selected by an external control signal, the power consumption is less than 60mW, the chip area is 0.70 * 0.68mm2.

【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】：TN402

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