Title :
Interference Alignment and Spatial Degrees of Freedom for the K User Interference Channel
Author :
Cadambe, Viveck R. ; Jafar, Syed A.
Author_Institution :
Electr. Eng. & Comput. Sci., Univ. of California Irvine, Irvine, CA
Abstract :
We show that the sum capacity of the K user frequency selective (or time-varying) interference channel is C(SNR) = (K/2) log(SNR) +o(log(SNR)) meaning that the channel has a total of K/2 degrees of freedom per orthogonal time and frequency dimension. Linear schemes of interference alignment and zero forcing suffice to achieve all the degrees of freedom and multi-user detection is not required.
Keywords :
ad hoc networks; interference (signal); wireless channels; frequency selective channel; interference alignment; multiuser detection; spatial degrees of freedom; user interference channel; Communications Society; Computer science; Frequency; Interference channels; MIMO; Multiuser detection; Signal to noise ratio; Transmitters; USA Councils; Wireless networks;
Conference_Titel :
Communications, 2008. ICC '08. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2075-9
Electronic_ISBN :
978-1-4244-2075-9
DOI :
10.1109/ICC.2008.190
