EE360 project: Interference Alignment for MIMO interference channel using Imperfect CSI
نویسنده
چکیده
Interference alignment is a novel technique introduced in [1] that allows for K/2 degrees of freedom in a K-user interference channel. A related work [2] proves the achievability of 4/3 degrees of freedom on the 2 user MIMO-X channel. However, the techniques require Channel State Information (CSI) at transmitter. In [3], it is shown that M(L− 1) log P bits of feedback broadcased by each Rx to all Tx suffices to achieve the stated K/2 degrees of freedom for the K user interference channel. In this report I show that 1 2 log P + constant bits of feedback per channel coefficient suffice to achieve dof for a K user MIMO interference channel. The proof uses the achievability presented in [5]. Finally I discuss the limitations of the proposed scheme and suggest possible future directions.
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