Greg Eslinger and John Dixon
Acoustic Technologies and Texas Instruments

Speech quality is a critical factor in establishing consumer preference of mobile handsets, wireless networks, hands-free devices and other mobile communications systems. Acoustic echoes and noise are endemic in wireless communications. Signal processing is required to overcome these concerns and achieve a high-quality audio output acceptable to the market. This paper discusses sources of echo in wireless communications as well as a new approach to analyze and cancel unwanted noise and echoes.