Polar Quantizer for Wireless Receivers: Theory, Analysis, and CMOS Implementation
Polar Quantizer for Wireless Receivers: Theory, Analysis, and CMOS Implementation
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用于无线接收器的极性量化器：理论、分析和 CMOS 实现
DOI：
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发表时间：
2014
期刊：
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通讯作者：
P. Heydari
中科院分区：
文献类型：
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作者：
Peyman Nazari;Byung;Fred Tzeng;P. Heydari
本文介绍了中频极化接收机（PRX）结构的原理和分析。通过在极域中使用新的量化技术，与传统的矩形（I/Q）接收器相比，所提出的接收器可以提高信号量化噪声比（SQNR）。建议PRX是由一个幅度和相位量化器。幅度量化器类似于电压域中的常规矩形量化器。相位量化器采用时间数字转换器（TDC）进行相位检测。此外，还利用直观的图解法分析了极坐标量化的量化特性。一个10位的极性量化器的设计和制作在130 nm CMOS，并实现了2- 5 dB的SQNR的改善相比，矩形量化器的信号带宽高达20 MHz。
This paper presents the theory and analysis of IF polar receiver (PRX) architecture. By using new quantization techniques in the polar domain, the proposed receiver can boost the signal to quantization noise ratio (SQNR) compared to a traditional rectangular (I/Q) receiver. The proposed PRX is composed of a magnitude and a phase quantizer. The magnitude quantizer is similar to the conventional rectangular quantizer in voltage domain. The phase quantizer employs a time-to-digital converter (TDC) for phase detection. Furthermore, an intuitive graphical method is used to analyze the quantization properties of the polar quantization. A 10 bit polar quantizer is designed and fabricated in 130 nm CMOS, and achieves 2- to 5-dB of SQNR improvement compared to rectangular quantizer for signal bandwidths as high as 20 MHz.