Cooperative Communication and Shared Handoff among Base, Relay, and Mobile Stations in OFDMA Cellular Networks
OwnerKoon Hoo Teo, Hongyuan Zhang +1inventors
InventorsKoon Hoo Teo, Hongyuan Zhang, Jinyun Zhang
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Abstract
In a cellular network, symbols are encoded and modulated to produce a modulated signal The modulated signal is mapped to a subcarrier using a spatial mapping matrix. An inverse fast Fourier transform is applied to the mapped signal to produce groups of tones. The groups of tones are transmitting concurrently to multiple receivers using the same channel as orthogonal frequency-division multiplexing access (OFDMA) signals. There is one group of tones for each receiver.
Claims35
A method for communicating in a cellular network, comprising at each transmitter in a set of transmitters the steps of:
- encoding symbols;
- modulating the encoded symbols to produce a modulated signal;
- mapping the modulated signal to a subcarrier using a spatial mapping matrix;
- and
- applying an inverse fast Fourier transform to the mapped signal to produce groups of tones;
- and then
- transmitting concurrently the groups of tones from the set of transmitters as orthogonal frequency-division multiplexing access (OFDMA) signals to a receiver using a single channel.
Dependencies are inferred from the claim text.