Comparative study of wideband single reference active noise cancellation algorithms on a fixed-point DSP

Abstract

In this paper, we present a comparative study of fixed-point implementations of various feedback Active Noise Cancellation (ANC) algorithms for headset applications. Different adaptive algorithms for wideband ANC were implemented on a TMS32OC54x fixed-point DSP with single-precision words. The performance of each of them was tested and analyzed using different types of noise signals.

A survey on active noise control in the past decade–Part II: Nonlinear systems

“…In addition, the round-off and quantization errors will change with the programmer's code implementation, and the correct values of the phase and amplitude compensation factors need to be determined [204]. An improvement of fixed-point DSP method Feedback ANC for headphone [202] was proposed in [204], which added feedback and communication error 2 Considering the implementation of different structures in fixed-point DSP, a detailed performance comparison of FxLMS, FxNLMS, IIR, and subband ANC algorithms was presented in [205]. The research results showed that the FxLMS and its variant are more suitable for ANC implementation and the fixed-point DSP has about 2dB degradation as compared with its floating-point counterpart.…”

Binaural active noise control using parametric array loudspeakers

“…Let L and N denote the tap lengths of w(n) and ŝm (n), respectively. The computational cost of the single-channel ANC system includes 2 divisions, 3L + 2N + 6 multiplications, and 3L + 2N + 1 additions in every iteration, since each denominator in (3) can be efficiently calculated using only 2 multiplications and 2 additions [18].…”