Noise-power estimation and performance improvement for SR-based receiver with few-bit ADC

In broadband communication systems, an analog-to-digital converter (ADC) with few-bit quantization is a promising component in RF front-end to ensure higher sampling rate. To mitigate the nonlinear behavior ADC, stochastic resonance (SR), which improves symbol error rate (SER) presence of noise, has been focused. The SER degrades high signal-to-noise ratio (SNR) region. this paper, we introduce addition intentional noise SR-based receiver. add appropriately, propose simple estimation methods for channel noise-power receiver ADC. obtain closed-form function, employ sigmoid approximation. Numerical examples show that proposed can estimate specific range SNR. Low be achieved SNR by noise.