Combination spatial diversity system
First Claim
1. A spatial diversity system for a wireless digital telephone system comprisingat least two antenna units for receiving and transmitting compressed and coded digital signals, wherein each unit comprises a radio operatively connected to an antenna, one of said units being a primary unit and each other unit being a diversity unit;
- the radio of each unit being in two-way communication, for both transmission and reception, with its own processing means, at least the processing means of said primary unit being constructed to expand the compressed digital signals and to detect quality data comprising link quality, AGC level and parity errors which are embodied in the digital signals;
means to transmit the quality data from each diversity unit to the processing means of the primary unit, the processing means of said primary unit being constructed to compare the quality data detected in the digital radio signals received through its own antenna with the quality data from each diversity unit and to select the best of such quality data; and
the processing means of said primary unit being also constructed to actuate a switch means in accordance with the selected quality data to connect the system to the antenna unit having the selected quality data.
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Accused Products
Abstract
A spatial diversity system for digital mobile telephone networks which comprises at least two antennas, one antenna being part of a primary (or master) unit and the other being part of a diversity (or slave) unit, each unit having processing means to detect the "quality" of digital audio signals received by their respective antennas, the "quality" comprising link quality, AGC level and parity errors; the primary unit being capable of comparing the "quality" of the audio signals received by each antenna, selecting the higher "quality" signal and transmitting the higher "quality" signal to the telephone network.
125 Citations
8 Claims
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1. A spatial diversity system for a wireless digital telephone system comprising
at least two antenna units for receiving and transmitting compressed and coded digital signals, wherein each unit comprises a radio operatively connected to an antenna, one of said units being a primary unit and each other unit being a diversity unit; -
the radio of each unit being in two-way communication, for both transmission and reception, with its own processing means, at least the processing means of said primary unit being constructed to expand the compressed digital signals and to detect quality data comprising link quality, AGC level and parity errors which are embodied in the digital signals; means to transmit the quality data from each diversity unit to the processing means of the primary unit, the processing means of said primary unit being constructed to compare the quality data detected in the digital radio signals received through its own antenna with the quality data from each diversity unit and to select the best of such quality data; and the processing means of said primary unit being also constructed to actuate a switch means in accordance with the selected quality data to connect the system to the antenna unit having the selected quality data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification