Spread-spectrum changeable base station
First Claim
1. A spread-spectrum system having a plurality of spread-spectrum units, with each spread-spectrum unit of said plurality of spread-spectrum units capable of operating as a base station and as a remote station, each spread-spectrum unit of said plurality of spread-spectrum units comprising:
- a base subunit including,means for receiving at a first frequency a plurality of spread-spectrum signals transmitted from the plurality of spread-spectrum units, respectively;
means for despreading the plurality of spread-spectrum signals as a plurality of despread-spread-spectrum signals, respectively;
means for demodulating the plurality of despread-spread-spectrum signals, to generate a plurality of demodulated signals, respectively;
means for combining the plurality of demodulated signals, and a local signal, as a combined signal;
means for converting the combined signal to a base-data signal;
means for spread-spectrum processing the base-data signal;
means for transmitting at a second frequency the spread-spectrum-processed-base-data signal as a base-spread-spectrum signal; and
a remote subunit, including,means for receiving at the second frequency the base-spread-spectrum signal;
means for despreading the base-spread-spectrum signal as a despread-base-spread-spectrum signal;
means for demodulating the despread-base-spread-spectrum signal as a base-analog signal;
means for converting a remote-analog signal to a remote-data signal;
means for spread-spectrum processing the remote-data signal; and
means for transmitting at the first frequency the spread-spectrum-processed-remote-data signal as one of the plurality of spread-spectrum signals.
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Accused Products
Abstract
A conference calling spread-spectrum communications system and method using a plurality of spread-spectrum units, any one of which may serve as the base station and where the base station may be changed from one spread-spectrum unit to another upon command. Each spread-spectrum unit includes a base subunit, a remote subunit, and a command subunit. An operator may initiate from the command subunit of a particular spread-spectrum unit, a command signal to activate the base subunit of the particular spread-spectrum unit. Upon initiating the command signal, the particular spread-spectrum unit is activated as the base station and the command signal is broadcast to the remaining plurality of spread-spectrum units. At a respective remote subunit of each of the remaining plurality of spread-spectrum units, the command signal is received and, in response to receiving the command signal, the respective remote subunit in each of the remaining plurality of spread-spectrum units is activated to operate the remaining plurality of spread-spectrums units as remote units.
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Citations
7 Claims
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1. A spread-spectrum system having a plurality of spread-spectrum units, with each spread-spectrum unit of said plurality of spread-spectrum units capable of operating as a base station and as a remote station, each spread-spectrum unit of said plurality of spread-spectrum units comprising:
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a base subunit including, means for receiving at a first frequency a plurality of spread-spectrum signals transmitted from the plurality of spread-spectrum units, respectively; means for despreading the plurality of spread-spectrum signals as a plurality of despread-spread-spectrum signals, respectively; means for demodulating the plurality of despread-spread-spectrum signals, to generate a plurality of demodulated signals, respectively; means for combining the plurality of demodulated signals, and a local signal, as a combined signal; means for converting the combined signal to a base-data signal; means for spread-spectrum processing the base-data signal; means for transmitting at a second frequency the spread-spectrum-processed-base-data signal as a base-spread-spectrum signal; and a remote subunit, including, means for receiving at the second frequency the base-spread-spectrum signal; means for despreading the base-spread-spectrum signal as a despread-base-spread-spectrum signal; means for demodulating the despread-base-spread-spectrum signal as a base-analog signal; means for converting a remote-analog signal to a remote-data signal; means for spread-spectrum processing the remote-data signal; and means for transmitting at the first frequency the spread-spectrum-processed-remote-data signal as one of the plurality of spread-spectrum signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of using a spread-spectrum system having a plurality of spread-spectrum units, with each spread-spectrum unit of said plurality of spread-spectrum units capable of operating as a base station and as a remote station, each spread-spectrum unit of said plurality of spread-spectrum units having a base subunit, a remote subunit, and a command subunit, the method comprising the steps of:
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receiving in a base subunit of a first spread-spectrum unit at a first frequency a plurality of spread-spectrum signals transmitted from the plurality of spread-spectrum units, respectively; despreading in the base subunit of the first spread-spectrum unit the plurality of spread-spectrum signals; demodulating in the base subunit the plurality of despread-spread-spectrum signals, to generate a plurality of demodulated signals, respectively; combining in the base subunit of the first spread-spectrum unit the plurality of demodulated signals, and a local signal, as a combined signal; converting in the base subunit of the first spread-spectrum unit the combined signal to a base-data signal; spread-spectrum processing in the base subunit of the first spread-spectrum unit the base-data signal; transmitting from the base subunit of the first spread-spectrum unit at a second frequency the spread-spectrum-processed-base-data signal as a base-spread-spectrum signal; receiving in a remote subunit of a second spread-spectrum unit at the second frequency the base-spread-spectrum signal; despreading in the remote subunit of the second spread-spectrum unit the base-spread-spectrum signal; demodulating in the remote subunit of the second spread-spectrum unit the despread-base-spread-spectrum signal as a base-analog signal; converting in the remote subunit of the second spread-spectrum unit a remote-analog signal to a remote-data signal; spread-spectrum processing in the remote subunit of the second spread-spectrum unit the remote-data signal; and transmitting from the remote subunit of the second spread-spectrum unit at the first frequency the spread-spectrum-processed-remote-data signal as one of the plurality of spread-spectrum signals.
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Specification