Multi-user communication using sparse space codes
AssigneeBlackBerry Limited
InventorsSagar DHAKAL, Amin MOBASHER, Steve HRANILOVIC, Alireza BAYESTEH
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Abstract
Multi-user sparse space codes are proposed as a new transmission scheme for uplink communication over a multi-user multiple-input-multiple-output (MIMO) communication channel.
Claims8
A method of detecting first user data from a first user equipment (UE) having a first number of transmit antennas and second user data from a second UE having a second number of transmit antennas, the method comprising:
- receiving a composite signal over multiple evolved base node (eNodeB) receive antennas in a given reception time interval, wherein the composite signal comprises two UE waveforms arising from the first UE mapping the first user data with a first sparse space code of a first sparsity and the second UE mapping the second user data with a second sparse space code of a second sparsity;
- and
- forming from the composite signal a first user data candidate and a second user data candidate based on a sum sparsity, such that a first statistic and a second statistic corresponding to the first user data and to the second user data, respectively, have been obtained.
An evolved base node (eNodeB) having multiple receive antennas, the eNodeB operative to receive a composite signal over the receive antennas in a given reception time interval and to form from the composite signal a first user data candidate and a second user data candidate based on a sum sparsity, wherein the composite signal comprises two user equipment (UE) waveforms arising from a first UE mapping first user data with a first sparse space code of a first sparsity and from a second UE mapping second user data with a second sparse space code of a second sparsity, the first UE having a first number of transmit antennas and the second UE having a second number of transmit antennas.
Dependencies are inferred from the claim text.