METHOD FOR FREQUENCY DIVISION DUPLEX COMMUNICATIONS
First Claim
1. An apparatus comprising:
- a remote unit configured to transmit a signal including a first data signal, the first data signal being allocated to only a first set of a plurality of sets of non-overlapping orthogonal frequency division multiplexed (OFDM) discrete frequency tones in a first frequency band of a plurality of non-overlapping frequency bands of a channel coupled to the remote unit, and in a first set of time intervals, fewer than all time intervals, of a plurality of time intervals of a time division multiple access (TDMA) frame of the channel.
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Abstract
The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system'"'"'s operation. The highly bandwidth-efficient communications method combines a form of time division duplex (TDD), frequency division duplex (FDD), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), spatial diversity, and polarization diversity in various unique combinations. The method provides excellent fade resistance. The method enables changing a user'"'"'s available bandwidth on demand by assigning additional TDMA slots during the user'"'"'s session.
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Citations
22 Claims
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1. An apparatus comprising:
a remote unit configured to transmit a signal including a first data signal, the first data signal being allocated to only a first set of a plurality of sets of non-overlapping orthogonal frequency division multiplexed (OFDM) discrete frequency tones in a first frequency band of a plurality of non-overlapping frequency bands of a channel coupled to the remote unit, and in a first set of time intervals, fewer than all time intervals, of a plurality of time intervals of a time division multiple access (TDMA) frame of the channel. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus comprising:
a base station configured to recover at least a first data signal from only a first set of a plurality of sets of non-overlapping orthogonal frequency division multiplexed (OFDM) discrete frequency tones in a first frequency band of a plurality of non-overlapping frequency bands of a channel coupled to the base station and in a first set of time intervals, fewer than all time intervals, of a plurality of time intervals of a time division multiple access (TDMA) frame of the channel coupled to the base station. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus comprising:
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a means for transmitting a signal including a first data signal, the first data signal being allocated to only a first set of a plurality of sets of non-overlapping orthogonal frequency division multiplexed (OFDM) discrete frequency tones in a first frequency band of a plurality of non-overlapping frequency bands of a channel coupled to the means for transmitting, and in a first set of time intervals, fewer than all time intervals, of a plurality of time intervals of a time division multiple access (TDMA) frame of the channel; and means to recover a second data signal from a received signal, the second data signal being recovered from only a second set of the plurality of sets of non-overlapping OFDM discrete frequency tones of the second frequency band in only a second frequency band of the plurality of non-overlapping frequency bands and in a second set of time intervals, fewer than all time intervals, of the plurality of time intervals of the TDMA frame.
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Specification