Multicell Optimization for Diversity and Interference Mitigation

We study diversity and interference mitigation with an emphasis on the interaction between the transmitter-receiver (Tx-Rx) pairs in a two-user, two-cell system in which the performance at each Rx depends on the actions of the both desired and the interfering Txs. We will propose two techniques. The...

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Vydáno v:	IEEE transactions on signal processing Ročník 56; číslo 5; s. 2050 - 2061
Hlavní autoři:	Oteri, O., Paulraj, A.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, NY IEEE 01.05.2008 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Algorithms Applied sciences Block codes Codes Coding, codes Constraining Decoding Detection, estimation, filtering, equalization, prediction Dominance Error probability Errors Exact sciences and technology Fading Information, signal and communications theory Interference MIMO Miscellaneous MSP-CODR MIMO precoder/decoder design MSP-MULT MIMO multiuser and multiaccess schemes Pareto analysis Pareto optimality Performance analysis Performance enhancement Radiofrequency interference Receiving antennas Signal and communications theory Signal processing Signal, noise SPC- INTF interference suppression and rejection Telecommunications and information theory Transmitting antennas Performance evaluation MIMO system Multiple access Block code Space-time codes Error probability Noise reduction Transmitter Decoding Beam forming Optimization Interference suppression SPC- INTF interference suppression and rejection MSP-CODR MIMO precoder/decoder design Greedy algorithm Signal processing MSP-MULT MIMO multiuser and multiaccess schemes Open market
ISSN:	1053-587X, 1941-0476
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Popis
Shrnutí:	We study diversity and interference mitigation with an emphasis on the interaction between the transmitter-receiver (Tx-Rx) pairs in a two-user, two-cell system in which the performance at each Rx depends on the actions of the both desired and the interfering Txs. We will propose two techniques. The first scheme is a greedy or competitive algorithm in which each Tx-Rx pair employs an orthogonal space-time (ST) block code combined with a multimode beamformer (a generalized ST code) to minimize the error probability to its own Rx till an equilibrium is reached. The second scheme is a cooperative algorithm, also based on a generalized ST code in which each Tx-Rx pair minimizes its error probability at its desired Rx but cooperates by limiting the amount of interference to the second pair's Rx. We will model and characterize the equilibrium of the competitive scheme (called the Nash equlibrium). We will then show that by using the cooperative algorithm, it is possible to find Pareto dominant actions where both Tx-Rx pairs either equal or improve their performance when compared with the NE actions. We will analyze the conditions for Pareto dominance of the cooperative scheme and finally demonstrate the performance improvements of both schemes over the single Tx-Rx pair generalized ST code.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	1053-587X 1941-0476
DOI:	10.1109/TSP.2007.909338