Abstract
We introduce an opportunistic interference mitigation (OIM) protocol, where a user scheduling strategy is utilized in K-cell uplink networks with time-invariant channel coefficients and base stations (BSs) having M antennas. Each BS opportunistically selects a set of users who generate the minimum interference to the other BSs. Two OIM protocols are shown according to the number of simultaneously transmitting users per cell, S: opportunistic interference nulling (OIN) and opportunistic interference alignment (OIA). Then, their performance is analyzed in terms of degrees-of-freedom (DoFs). As our main result, it is shown that KM DoFs are achievable under the OIN protocol with M selected users per cell, if the total number of users in a cell, N, scales at least as SNR^{(K-1)M}. Similarly, it turns out that the OIA scheme with S(
| Original language | English |
|---|---|
| Article number | 6202627 |
| Pages (from-to) | 1935-1944 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Communications |
| Volume | 60 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2012 |
Bibliographical note
Funding Information:This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0011140). The material in this paper was presented in part at the Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2010.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering