Low complexity MIMO receiver with decoupled detection

A low-complexity decoupled detection MIMO receiver structure is proposed for wireless systems with frequency-selective channels. This receiver structure is termed the decoupled Viterbi algorithm (DVA). In this structure, all the transmitted data streams are completely decoupled at the receiver and are detected independently. This structure can also be viewed as a variation of a MIMO minimum mean square error decision feedback sequence estimator (MMSE-DFSE) structure. Moreover, a certain MMSE optimization constraint, namely L-tap forward interference control (L-tap FIC), is needed to achieve complete decoupling of the transmitted data streams at the receiver. It is shown that the complexity of the DVA is "linear", meaning it increases only linearly with the number of transmitted data streams. Compared with other receivers that have "linear" complexity, such as partitioned Viterbi algorithm (PVA) (Miller, C. et al., IEEE Trans. on Commun., vol.49, no.11, 2001), DVA provides an attractive alternative since it does not require interchange of tentative decisions between different detection branches.

[1]  Alexandra Duel-Hallen,et al.  Delayed decision-feedback sequence estimation , 1989, IEEE Trans. Commun..

[2]  Ali H. Sayed,et al.  The finite-length multi-input multi-output MMSE-DFE , 2000, IEEE Trans. Signal Process..

[3]  Akbar M. Sayeed,et al.  Low complexity MIMO receiver via maximum SINR interference cancellation , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[4]  Naofal Al-Dhahir,et al.  FIR channel-shortening equalizers for MIMO ISI channels , 2001, IEEE Trans. Commun..

[5]  W. van Etten,et al.  Maximum Likelihood Receiver for Multiple Channel Transmission Systems , 1976, IEEE Trans. Commun..

[6]  Anders Ahlén,et al.  Reuse within a cell-interference rejection or multiuser detection? , 1999, IEEE Trans. Commun..

[7]  John M. Cioffi,et al.  MMSE decision-feedback equalizers: finite-length results , 1995, IEEE Trans. Inf. Theory.

[8]  Desmond P. Taylor,et al.  Estimation of co-channel signals with linear complexity , 2001, IEEE Trans. Commun..

[9]  J. Skold,et al.  Radio interface performance of EDGE, a proposal for enhanced data rates in existing digital cellular systems , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).