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- W3022134766 abstract "Publisher SummaryThe chapter focuses on Modems (modulator demodulator), which are widely used to transmit and receive digital data using analog modulation over the plain old telephone service (POTS) network as well as private lines. Although the data to be transmitted is digital, the telephone channel is designed to carry voice signals having a bandwidth of approximately 300 Hz to 3300 Hz. The telephone transmission channel suffers from delay distortion, noise, crosstalk, impedance mismatches, near-end and far-end echoes, and other imperfections. While certain levels of these signal degradations are perfectly acceptable for voice communication, they can cause high error rates in digital data transmission. The fundamental purpose of the transmitter portion of the modem is to prepare the digital data for transmission over the analog voice line. The purpose of the receiver portion of the modem is to receive the signal that contains the analog representation of the data and reconstruct the original digital data at an acceptable error rate. High performance modems make use of digital techniques to perform such functions as modulation, demodulation, error detection and correction, equalization, and echo cancellation." @default.
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- W3022134766 date "2003-01-01" @default.
- W3022134766 modified "2023-10-16" @default.
- W3022134766 title "DSP Applications" @default.
- W3022134766 cites W2031981042 @default.
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- W3022134766 doi "https://doi.org/10.1016/b978-075067611-3/50009-8" @default.
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