Single antenna interference rejection in GSM/EDGE networks

While previous interference rejection techniques suitable for the widespread GSM/EDGE standard either require multiple antennas or are highly complex, this paper investigates the performance of a low-complexity single antenna interference rejection technique suitable for implementation in today´s GSM terminals. The study is performed both on the link level in different scenarios and on the system level with fully dynamic radio network simulations. The link level simulations show significant gains. For example, with a single co-channel interferer, the gain over a conventional receiver is up to 10 dB. On the system level it is shown that the introduction of the proposed interference rejection method in all terminals gives a large increase in downlink speech capacity in a tightly planned GSM network. The strong but sporadic interference in such a network is an ideal environment for efficient interference rejection.