Patent ID: 9042333
Filing Date: 2015-05-26
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A cooperative multi-user multiple input, multiple output (MIMO) system, comprising: at least one MIMO processor configured to pre-code a plurality of data streams to generate a plurality of subspace-coded data streams, each subspace-coded data stream comprising a linear combination constructed from a sum of a plurality of terms multiplied by coefficients, the plurality of terms comprising at least a subset plurality of the plurality of data streams, and the coefficients comprising MIMO subspace code values based on channel state information corresponding to channels between a plurality of spatially distributed transceiver stations and a plurality of wireless client devices; a network interface communicatively coupled to the plurality of spatially distributed transceiver stations via a network; and a network controller configured to send the subspace-coded data streams to the plurality of spatially distributed transceiver stations via the network, and coordinate the plurality of spatially distributed transceiver stations to simultaneously transmit the subspace-coded data streams over wireless links to each of the plurality of wireless client devices, the MIMO subspace code values providing for transmissions comprising a plurality of simultaneous non-interfering subspace channels within a common frequency, wherein first portions of transmissions received at a first wireless client device coherently combine to produce at least a first set of the plurality of data streams, and wherein at least second portions of the transmissions received at the first wireless client device combine to cancel at least a second set of the plurality of data streams intended for at least a second wireless client device.