This letter proposes a novel nonlinear distortion for the unique identification of receiving room impulses in stereo acoustic echo cancellation when applying the frequency-domain adaptive filtering technique. This nonlinear distortion is effective in reducing the coherence between the two incoming audio channels and its influence on audio quality is inaudible. key words: acoustic echo cancellat...

Abstract This paper studies how nonlinear distortion is generated in the combination of an inverter-based low-noise amplifier and a passive mixer. The dominant nonlinearity appears to be quadratic $$V_{gs}V_{ds}$$ V gs ds mixing t...

One drawback of OFDM systems is the high peak-to-average power ratio, which imposes strong requirements on the linearity of power amplifiers (PAs). Such linearity requirements translate into high back-off that results in low power efficiency. In order to improve power efficiency, a PA nonlinearity cancellation (PANC) technique is introduced which reduces the nonlinear distortion effects on the ...

A maximally flat 10.7-MHz fourth-order bandpass filter with on-chip automatic tuning system is presented. The signal-to-in-band integrated noise ratio (SNR) of the automatically tuned filter is around 68 dB. The third intermodulation distortion (IM3) is lower than -40 dB for a two-tone input signal of 3.2 V peak to peak (Vp,,). The complete system operates with supply voltages of f2.5 V. The po...

The rapid binding of cytotoxic colicin E3 by its cognate immunity protein Im3 is essential in safeguarding the producing cell. The X-ray structure of the E3/Im3 complex shows that the Im3 molecule interfaces with both the C-terminal ribonuclease (RNase) domain and the N-terminal translocation domain of E3. The association and dissociation rates of the RNase domain and Im3 show drastically diffe...

High-frequency distortion in bipolar transistors is examined by using the charge-control approach of Poon and Narayanan to connect the device’s distortion behavior to its “loaded” unity–current–gain frequency (^ ). The resulting expressions for the distortion reveal considerable information on its frequency and bias dependence. Points on the ^ versus collector current curve yielding optimum dis...

Continued improvements of transceiver systems-on-a-chip play a key role in the advancement of mobile telecommunication products as well as wireless systems in biomedical and remote sensing applications. This dissertation addresses the problems of escalating CMOS process variability and system complexity that diminish the reliability and testability of integrated systems, especially relating to ...

Adaptive algorithms have been widely used to reduce or cancel undesired echo signals in acoustic communication systems. In particular, in a double-talk scenario, fluctuations in the estimation of echo path parameters and nonlinear distortion in a hybrid system may result in significant performance degradation. In this paper, the use of nonlinear echo cancellation via a correlation RLS (CRLS) al...