Selection of High Speed ADC in the Application of Digital IF Receiver for OFDM

Tong Jiaxin; Gao Jinchun

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Selection of High Speed ADC in the Application of Digital IF Receiver for OFDM

Tong Jiaxin 1 #,Gao Jinchun 2 *

1.School of Electronic Engineering, Beijing University of Posts and Telecommunications, 100876, Beijing, China

2.School of Electronic Engineering, Beijing University of Posts and Telecommunications, 100876

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Science Foundation of China （No.No. 61001060, No. 61201025, and No. 61201027), the Fundamental Research Funds for the Central Universities ）

Opened online:20 December 2012

Accepted by: none

Citation: Tong Jiaxin,Gao Jinchun.Selection of High Speed ADC in the Application of Digital IF Receiver for OFDM[OL]. [20 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4499664

When it comes to the design of digital intermediate-frequency (IF) receiver, how to select an optimum high-speed analog to digital converter (ADC) is a key point. This paper presents an effective method in the selection of ADC and the main consideration is signal to noise ratio (SNR), which contains the influence of peak-to-average Ratio (PAPR). A helpful formula is derived that can combine the power of input signal with ADC's quantitative peak. This paper provides calculation model for OFDM and analysis of simulation result using MATLAB. It turned out that the practical ADC's resolution bits should be left three digits allowances. In addition, the noise figure (NF) of ADC is discussed in digital IF receiver and RF directly-sampling digital receiver.

Keywords:Communication Technology; Signal to Noise Ratio (SNR); Peak-to-Average Ratio (PAPR); Quantization Peek; Resolution Bits; Noise Figure (NF).

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