Wireless Channel Estimation with Low-Complexity 1-bit ADC and Unknown Quantization Threshold Academic Article uri icon

abstract

  • In this paper, the problem of signal parameter estimation from measurements acquired by a low-complexity analog-to-digital converter (ADC) with $1 $-bit output resolution and an unknown quantization threshold is considered. Single-comparator ADCs are energy-efficient and can be operated at ultra-high sampling rates. For analysis of such hard-limiting systems, a fixed and known quantization threshold is usually assumed. In the symmetric case, ie, zero hard-limiting offset, it is well-understood that in the low signal-to-noise ratio (SNR) regime the signal processing performance degrades moderately by ${2}/{\pi} $($-1.96$ dB) when comparing to an ideal $\infty $-bit converter. Due to hardware imperfections, low-complexity $1 $-bit ADCs will in practice exhibit an unknown threshold different from zero. Therefore, the offset has to be estimated jointly with the signal parameters. Here we study the …

publication date

  • March 6, 2017