Synthesis of angle modulated ultra wideband signals based on regenerative sampling
Synthesis of angle modulated ultra wideband signals based on regenerative sampling
复制标题
基于再生采样的角度调制超宽带信号合成
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
M. Vossiek
中科院分区：
文献类型：
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作者：
C. Carlowitz;M. Vossiek
对于高效的低功率UWB通信和测距系统，需要对UWB信号频谱特性进行细粒度控制，以在给定的功率预算和频谱掩码下最大化吞吐量和信噪比。简单的脉冲无线电调制技术，如脉冲幅度、二进制相位或脉冲位置调制，通常不能提供与更复杂的角度调制原理相同的灵活性和频谱效率。然而，角度调制信号的产生通常比脉冲无线电发射机复杂得多。本文提出了一种基于再生采样的脉冲角度调制超宽带信号合成的新概念，克服了上述矛盾。该概念允许用低复杂度的硬件产生任意相位调制的脉冲UWB信号。它基于开关注入锁定振荡器，该振荡器从相位调制基带信号的高次谐波中采样相位。该信号合成器在RF频率不需要任何线性放大器或PLL。该原理为超宽带信号带来了复杂的角度调制，同时又保留了低功耗实现的可行性。本文首次提出了这种全新的信号产生原理，并对其性能进行了理论和实验验证。
For efficient low power UWB communication and ranging systems, fine grained control of the UWB signal spectral properties is desirable to maximize throughput and SNR at a given power budget and spectral mask. Simple impulse radio modulation techniques like pulse amplitude, binary phase or pulse position modulation usually do not provide the same flexibility and spectral efficiency as more complex angle modulation principles. The generation of angle modulated signals, however, is usually much more complex than for impulse radio transmitters. In this paper, a novel concept for the synthesis of pulsed angle modulated ultra wideband signals based on regenerative sampling is introduced that overcomes the above mentioned contradiction. The concept allows for generating arbitrarily phase modulated pulsed UWB signals with a low-complexity hardware. It is based on a switched injection locked oscillator that samples the phase from a high order harmonic of a phase modulated baseband signal. The signal synthesizer does not require any linear amplifiers or PLLs at RF frequency. This principle brings complex angle modulation to ultra wideband signals while at the same time retaining the feasibility of low power implementation. In this paper, this completely novel signal generation principle is introduced for the first time and its capability is theoretically and experimentally verified.