System- and circuit-level optimization of PLL designs for DVB-T/H receivers

作者：Tchamov Nikolay N^*; Syrjala Ville; Rinne Jukka; Valkama Mikko; Zou Yaning; Renfors Markku

来源：Analog Integrated Circuits and Signal Processing, 2012, 73(1): 185-200.

DOI：10.1007/s10470-011-9823-2

• Phase noise
• DVB-T
• DVB-H
• PLL
• VCO
• Inter-carrier interference
• Adjacent channel interference

This article proposes a framework for the optimization of voltage-controlled oscillator (VCO) designs in frequency synthesizers for digital video broadcasting - terrestrial/handheld (DVB-T/H) receivers. Linear time-invariant phase-domain model of a charge-pump phase-locked loop (PLL) is devised and includes both flicker (1/f) and thermal noise contributions from the loop oscillators. By modeling the entire receiver, it is shown that there are combinations of flicker and thermal noise contributions that result in a constant sum of inter-carrier interference (ICI) and adjacent channel interference, and constant symbol error rate as well. Consequently, optimization of the VCO phase noise spectrum is defined while maintaining the standard-specified symbol-error rate. Link-level performance evaluation is carried out to validate the stipulated trade-off. The effect of ICI mitigation schemes is discussed. Circuit-level VCO design approaches utilizing the derived trade-off are finally presented. The proposed optimization procedure is generic and is also applicable to other systems based on Orthogonal Frequency-Division Multiplexing.

• 出版日期2012-10