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The single-carrier frequency division multiple access (SC-FDMA) is employed in the 3GPP Long Term Evolution (LTE) standard as the uplink transmission scheme. In this paper, we propose a novel successive interference cancellation (SIC) detector for multiuser detection in multiuser Multiple Input Multiple Output (MIMO) SC-FDMA system with co-channel interference (CCI). Compared to conventional SIC receiver,...
In a mobile relay system, the idle users can be formed as a cluster to support nearby active users. In order to reduce the complexity of the processing in the relay nodes and destination nodes, a novel transmit preprocessing method is proposed for the cluster based multi-user relay system. Block diagonalization (BD) algorithm is adopted twice in the proposed method to remove inter-cluster and intra-cluster...
Coordinated multiple point transmission and reception (CoMP) has attracted a lot of attention recently because of its potential for multi-cell co-channel interference (CCI) mitigation and spectral efficiency increase. CoMP inevitably requires increased signaling overhead and inter-base communication. Therefore in practice, only a limited number of Base Stations (BS) can cooperate with acceptable overhead...
The existed preamble structure for orthogonal frequency division multiplex/offset QAM (OFDM/OQAM) system requires two zero-value guard symbols to guarantee ISI and ICI avoidance (equivalent to 3/2 complex value symbols in OFDM with cyclic prefix system), which leads to OFDM/OQAM system with low spectrum efficiency. In this paper, we shorten the preamble with 1 zero-value guard symbol to improve the...
Direct sequence code-division multiple access (DS-CDMA) and multicarrier (MC-) CDMA are two important CDMA schemes for high rate wireless communication. A novel linear per user minimum mean square error (PU-MMSE) detection technique for DS-CDMA with frequency domain equalization (FDE) based on the MMSE criterion applied per user is presented. It is shown by computer simulation that PU-MMSE outperforms...
A novel linear per user minimum mean square error (PU-MMSE) detection technique for direct sequence code- division multiple access (DS-CDMA) with frequency domain equalization (FDE) based on the MMSE criterion applied per user is presented, which approximately restores the orthogonality among the spreading sequences and reduces the interference. It is shown by computer simulation that the DS-CDMA...
In this paper we investigated interference pre-subtraction problems in multi-users downlink channel for multiple-antennas OFDM system, in which the number of users is larger than the number of transmit antennas. We present a new jointly spatial loading and preceding strategy to select reasonably a group of users for each tone on each transmit antenna by maximizing signal to interference and noise...
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