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Digital-to-Analog Conversion of Pulse Amplitude Modulated Systems Using Adaptive Quantization

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Abstract

In this paper, a full analysis is presented on digital-to-analog conversion for pulse amplitude modulated (PAM) systems. By analyzing the cyclostationary nature of pulse-amplitude modulation (PAM) systems, two methods of quantization are proposed –fixed and adaptive. Examples of this quantization analysis are provided for the reverse link transmitter chain in a cdma2000 system, and for the baseband transmitter chain of an IS-136 system. In addition, the impact of D/A converter nonlinearity on resultant signal-to-noise ratio is analyzed. Simulations are provided which show that adaptive quantization provides performance benefits over fixed methods in terms of adjacent channel power rejection (ACPR) and transmitter signal-to-noise ratio.

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  1. Nokia Research Center, 6000 Connection Drive, Irving, TX, 75039, U.S.A.

    Giridhar D. Mandyam

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  1. Giridhar D. Mandyam
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Mandyam, G.D. Digital-to-Analog Conversion of Pulse Amplitude Modulated Systems Using Adaptive Quantization. Wireless Personal Communications 23, 253–281 (2002). https://doi.org/10.1023/A:1021166915751

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