Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
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United States of America Patent
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-
Aug 28, 2001
Issued Date -
N/A
app pub date -
Nov 4, 1999
filing date -
Mar 20, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telecommunication system for processing a plurality of simultaneous bidirectional communications includes a primary station and at least one secondary station using wireless transmissions over one of a plurality of available RF carrier frequencies. Each carrier frequency has an associated predetermined bandwidth which is designed to accommodate one analog voice signal therein and each carrier frequency contains a plurality of time slots. Each bidirectional communication includes transmit (TX) and receive (RX) information signals. The secondary stations include a baseband processor for PSK coding an input signal; a storage means coupled to said baseband processor for storing information; a control means coupled to the baseband processor and the storage means to permit access to the stored information; a filter for performing quadrature sampling of the PSK coded signal; a digital to analog converter for converting the sampled PSK coded signal into an analog signal; and a frequency translator for translating the frequency spectrum of the analog signal to a second frequency spectrum.
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