Abstract: A method for processing user symbols with Tomlinson Harashima precoder (THP) in a base station, of a wireless system having K user terminals (UEs) which communicate with the base station via an uplink channel and corresponding downlink (DL) channel, comprises estimating a DL channel matrix Hk; determining receiver processing matrix Vk; computing an effective matrix DL channel Heff; performing QR decomposition of Heff; computing THP matrices; calculating scalar weights for the UEs; processing user symbols by the THP having the THP matrices to produce an output of filtered vector symbols for the UEs; directing output of the THP to the channel represented by the DL channel matrix through which communications occur in the wireless system with the UEs; performing additional receiver processing on the transmitted signals at the UEs based on Vk for each of the K UEs; and using the scalar weights on the transmitted signals at the UEs.

Abstract: A distributed antenna system comprises users; remote radio heads which are to be divided into clusters; and a central base station (CBS) including a CBS processor, a CBS memory, a user ordering module, and a user scheduling and cluster formation module. The user ordering module is configured to order the users in decreasing values of proportional fair scheduling metrics to provide a set of ordered users. The user scheduling and cluster formation module is configured to schedule the users according to the order of the users in decreasing values of proportional fair scheduling metrics; and for each user being scheduled according to the order of the users, pick up first N number of remote radio heads, in decreasing order of signal strength to the user being scheduled, which have not been picked up previously, to form a cluster of size N for the user being scheduled.

Abstract: A central base station for interference management in a distributed antenna system comprises a processor; a memory; and a frequency partition module configured to divide the remote radio heads into clusters and allocate a frequency band to each cluster. Multiple clusters use the same frequency band and groups of clusters are formed. A joint scheduler is configured, for each group, to activate at most two clusters at any given time and deactivate remaining clusters in the group, one of the at most two activated clusters being a serving cluster of the group, and to associate one or more users with the serving cluster in the group. An interference alignment module is configured to apply downlink interference alignment between the at most two activated clusters in each group to align transmit directions of all interferences between the at most two activated clusters.

Abstract: In the embodiments of the present invention, proposed is a method in which a CoMP enabled UE chooses the BSs to be in its cooperating set and a BS partitions its bandwidth to serve its own UEs and UEs from other cells that have requested it to be in its cooperating set.

Abstract: The present invention provides a method for use in a wireless communication system that supports orthogonal frequency division multiplexing (OFDM) of transmissions over a plurality of subcarriers. One embodiment of the method includes a network entity that allocates one or more of a plurality of sub-bands for communication with an access terminal. Each of the sub-bands includes one or more of the subcarriers and is associated with a corresponding a pseudo-random sequences. The network entity can also transmit one or more of the plurality of pseudo-random sequences over an air interface. The transmitted pseudo-random sequence indicate the sub-bands that are allocated for communication with the access terminal.