Apparatus for avoiding spectrum spreading when switching a trans

Details Apparatus for avoiding spectrum spreading when switching a trans Apparatus for avoiding spectrum spreading when switching a trans

1988-09-07

1990-09-11

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 77, H04B 7005

Patent

active

049568370

ABSTRACT:
An apparatus for avoiding spectrum spreading in switching on and off a transmitter in a station included in a time multiplexed radio transmission system, e.g. a mobile telephony system, where two mutually 90-degree phase-shifted baseband signals (sin a(t), cos a(t)) are generated, each of these signals being intended to modulate a carrier wave. The apparatus includes means (MP, DAP, DAI, DAQ) achieving that the power of the baseband signals follows an increasing reference level at the start of each time slot and follows a decreasing reference level at the end of each time slot.

REFERENCES:
patent: 4494239 (1985-01-01), Martin
patent: 4644531 (1987-02-01), Sasaki

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