Design of digital broadcast telephone system of coal mine

Ma, Zhenghua; Yao, Liujun; Jiong-ru, Zhou; Dejun, Kong

doi:10.1109/icecc.2011.6066391

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2014

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“…al, designed an adaptive filter to remove an unwanted noise which might occur during music recordings, and echo in telephone networks. In [8], Zhenghua Ma; Liujun Yao; Jiongru Zhou; and Dan Kong introduced a design scheme of digital broadcast telephone system of coal mine based on TCP/IP protocol and TMS320DM642 digital processor. The system makes use of audio codec chip TLV320AIC23B to achieve audio codec and adaptive anti-noise algorithm so that the output audio's quality could be good to meet requirements of the voice in the mine, etc.…”

Section: Introductionmentioning

confidence: 99%

A New LMS Algorithm and its Application to Improve Quality of Broadcast-Telephone System Use in Underground Coal Mines

Truyen¹,

Vinh²

2014

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)

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-A new LMS algorithm with a variable step-size and its application to improve the quality of broadcast-telephone system use in underground coal mines is presented in this paper. The step-size of the proposed algorithm is proportional to not only the norm of the smoothed gradient vector but also the smoothed mean-square error. Simulation results are presented to support the analysis and to compare the performance of the new LMS algorithm with the ordinary LMS, NLMS algorithms. They show that the performance of the new algorithm in stationary as well as in non-stationary environment is superior to ordinary LMS, NLMS algorithms.

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Section: Introductionmentioning

confidence: 99%