Interference alignment with limited feedback
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Date
2009
Publication Type
Conference Paper
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Abstract
We consider single-antenna interference networks where M sources, each with an average transmit power of P/M, communicate with M destinations over frequency-selective channels (with L taps each) and each destination has perfect knowledge of its channels from each of the sources. Assuming that there exist error-free non-interfering broadcast feedback links from each destination to all the nodes (i.e., sources and destinations) in the network, we show that naive interference alignment, in conjunction with vector quantization of the impulse response coefficients according to the scheme proposed in Mukkavilli et al., IEEE Trans. IT, 2003, achieves full spatial multiplexing gain of M/2, provided that the number of feedback bits broadcast by each destination is at least M(L-1) log P.
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published
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Book title
2009 IEEE International Symposium on Information Theory
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Pages / Article No.
1759 - 1763
Publisher
IEEE
Event
IEEE International Symposium on Information Theory (ISIT 2009)