Abstract
We analyze the performance of a cellular network, where Poisson point process distributed half-duplex (HD) downlink (DL) and uplink (UL) users are served by multiple full-duplex (FD) base stations (BSs). To address the surge in interference in the network due to the simultaneous operation in time and frequency of the FD BSs, we (a) adopt a self-interference cancellation scheme at each BS, and (b) apply linear interference alignment in each cell to cancel the intra-cell interference. Further, to better capture the distribution of the FD BSs, we model the BSs as a Matérn hard-core point process, in which a minimum distance is imposed between points. The performance of both UL and DL users is analyzed by deriving general expressions and closed-form approximations for the outage probability and throughput. Next, simulations are carried out for both macro and micro cell environments under both FD and HD operations with respect to various network parameters. Our results reveal several fundamental characteristics and the necessary conditions required for the successful deployment of such networks.
Highlights
F ULL-DUPLEX (FD) wireless communication, which caters for simultaneous transmission and reception at the same time-frequency band, has attracted a great deal of attention for its potential to double the spectrum efficiency and reduce end-to-end latency when compared to half-duplex (HD) systems
For networks equipped with FD base stations (BSs), DL users suffer from additional co-channel interference (CCI) from UL users within the same cell
Given the number of available antennas and the amount of data streams required at each DL and UL user, for interference alignment (IA) to be feasible within each cell, only Kdmax out of a total Kd DL users and Kumax out of a total Ku UL users can be served by each BS
Summary
F ULL-DUPLEX (FD) wireless communication, which caters for simultaneous transmission and reception at the same time-frequency band, has attracted a great deal of attention for its potential to double the spectrum efficiency and reduce end-to-end latency when compared to half-duplex (HD) systems. By setting a hardcore distance and modeling the locations of BSs as a HCPP, it is possible to suppress the inter-cell interference from BSs. For networks equipped with FD BSs, DL users suffer from additional co-channel interference (CCI) from UL users within the same cell. In contrast to previous works that model the spatial distribution of BSs as a PPP, we adopt a more realistic HCPP model by imposing a hard-core distance between FD BSs, which helps to reduce inter-cell interference. We use linear IA to cancel out the intra-cell interference from UL users towards DL users The performance of both UL and DL transmissions are studied and closed-form approximations for outage probability and throughput are derived. Cn×m is used to represent the set of n × m complex matrices
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