Multi-user interleaving and modulation in a wireless network
A wireless transmit/receive unit (WTRU) may receive a constellation symbol that includes indications that each are associated with a respective WTRU of a plurality of WTRUs. The WTRU may determine that a first weight associated with a first indication of the indications is different than a second weight associated with a second indication of the indications. The indications may comprise indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).
1. A method for use in a device, the method comprising:
receiving a plurality of encoded bit streams, wherein each of the plurality of encoded bit streams is associated with one of a plurality of stations (STAs), wherein each of the plurality of STAs is associated with different subcarriers; and
transmitting a multiplexed bit stream for multi-user-multiple input multiple output (MU-MIMO) signal by interleaving the plurality of encoded bit streams and modulating the interleaved plurality of encoded bit streams such that a modulated Orthogonal Frequency-Division Multiple Access (OFDMA) symbol from the interleaved plurality of encoded bit streams includes a plurality of bits from an encoded bit stream associated with a first STA of the plurality of STAs and a plurality of bits from an encoded bit stream associated with a second STA of the plurality of STAs, wherein adjacent bits of the interleaved plurality of encoded bit streams are mapped onto non-adjacent subcarriers of the modulated OFDMA symbol.
2. The method of claim 1 , further comprising:
grouping, based on a number of a plurality of STAs, the multiplexed bit stream into a plurality of interleaved bit substreams.
3. The method of claim 1 , wherein the multiplexed bit stream is used for downlink MU-MIMO transmissions.
4. The method of claim 1 , wherein the device is an access point (AP).
5. A device comprising:
at least one processor; and
a transceiver,
the at least one processor and the transceiver configured to:
receive a plurality of encoded bit streams wherein each of the plurality of encoded bit streams is associated with one of a plurality of stations (STAs), wherein each of the plurality of STAs is associated with different subcarriers ; and
transmit a multiplexed bit stream for multi-user-multiple input multiple output (MU-MIMO) signal by interleaving the plurality of encoded bit streams and modulating the interleaved plurality of encoded bit streams such that a modulated Orthogonal Frequency-Division Multiple Access (OFDMA) symbol from the interleaved plurality of encoded bit streams includes a plurality of bits from an encoded bit stream associated with a first STA of the plurality of STAs and a plurality of bits from an encoded bit stream associated with a second STA of the plurality of STAs, wherein adjacent bits of the interleaved plurality of encoded bit streams are mapped onto non-adjacent subcarriers of the modulated OFDMA symbol.
6. The device of claim 5 , wherein the at least one processor and the transceiver are further configured to group, based on a number of the plurality of STAs, the multiplexed bit stream into a plurality of interleaved bit substreams.
7. The device of claim 5 , wherein the multiplexed bit stream is used for downlink MU-MIMO transmissions.
8. The device of claim 5 , wherein the device is an access point (AP).
9. An access point (AP) comprising:
at least one processor; and
a transceiver,
the at least one processor and the transceiver configured to:
receive a plurality of encoded bit streams, wherein each of the plurality of encoded bit streams is associated with one of a plurality of subcarricr users stations (STAs), wherein each of the plurality of STAs is associated with different subcarriers; and
transmit a multiplexed bit stream for multi-user-multiple input multiple output (MU-MIMO) signal by interleaving the plurality of encoded bit streams and modulating the interleaved plurality of encoded bit streams such that a modulated Orthogonal Frequency-Division Multiple Access (OFDMA) symbol from the interleaved plurality of encoded bit streams includes a plurality of bits from an encoded bit stream associated with a first STA of the plurality of STAs and a plurality of bits from an encoded bit stream associated with a second STA of the plurality of STAs, wherein adjacent bits of the interleaved plurality of encoded bit streams are mapped onto non-adjacent subcarriers of the modulated OFDMA symbol.
10. The AP of claim 9 , wherein the at least one processor and the transceiver are further configured to group, based on a number of the plurality of STAs, the multiplexed bit stream into a plurality of interleaved bit substreams.
11. The AP of claim 9 , wherein the multiplexed bit stream is used for downlink MU-MIMO transmissions.