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A very low power and high-quality signal transmission baseband LSIC for personal communications-advanced signal processing and one-channel integration

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8 Author(s)
Kato, S. ; NTT Wireless Syst. Labs., Yokosuka, Japan ; Kubota, S. ; Seki, K. ; Enomoto, K.
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This paper proposes a very low power consumption (2V operation) one-chip baseband LSIC for personal communication terminals. It is composed of a π/4 QPSK modem, a TDMA-TDD controller, an ADPCM codec and a LAPDC controller. The developed CMOS LSIC completely meets the PHS (Personal Handy Phone System) standard. By employing a novel coherent demodulator and an ADPCM codec with a click noise suppressor, 6dB higher-quality voice transmission has been realized in fading environments. Moreover, the novel circuit configurations of the modem, the ADPCM codec, the TDMA-TDD controller and the LAPDC controller make it possible to reduce significantly the power consumption of the baseband circuits of personal communication terminals

Published in:

Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE  (Volume:2 )

Date of Conference:

28 Nov- 2 Dec 1994