Improve the Bit Error Rate Performance Using Mixed ADC in Frequency Selective Fading Channel
chunduru niharika
Analog-to-digital converter (ADC), massive multiple-input-multiple-output (MIMO), mixed-ADC architecture, orthogonal frequency division multiplexing (OFDM).
This paper speaks to the mixed-ADC architecture for frequency-selective channels, Multi-carrier techniques are used to handle the inter-symbol interference (ISI) and inter-carrier interference (ICI). The Multi-carrier techniques such as orthogonal frequency division multiplexing(OFDM) is employed to handle inter-symbol interference (ISI). A frequency-domain equalizer is designed for mitigating the inter-carrier interference (ICI). For static single-input multiple- output (SIMO) channels, a closed-form expression of the generalized mutual information (GMI) is derived, and based on which the linear frequency-domain equalizer is optimized and then extended to ergodic time-varying SIMO channels with estimated channel state information (CSI), where numerically tight lower and upper bounds of the GMI are derived The framework is applicable to the multi-user scenario, for both static and time-varying channels and the numerical studies reveal that the mixed-ADC architecture with a small proportion of high-resolution ADCs does achieve a dominant portion of the achievable rate of ideal conventional architecture, and it improves the performance as compared with one-bit massive MIMO.
Article Details
Unique Paper ID: 147047

Publication Volume & Issue: Volume 5, Issue 3

Page(s): 209 - 214
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