Design and analysis of a trellis-based receiver exploiting two co-located antennas with dual polarizations

The capacity of the 2^nd generation TDMA cellular radio networks such as GSM and EDGE is limited by co-channel interference (CCI) rather than noise. There are some solutions to cancel the CCI and improve the network capacity such as a receiver with multiple antennas (MIMO), or a receiver with single antenna interference cancellation (SAIC). The paper proposes a receive system in which two co-located antennae consisting of one vertical polarized antenna and one horizontal polarized antenna instead of multiple antennae are used. The proposed system has lower cost and volume than a MIMO system, whereas its performance is better than that of a SAIC system due to additional polarization diversity. Moreover, this receiver can be applied effectively in high-modulation scheme (e.g. 8 PSK in EDGE) and/or in presence of more than one dominating interferer.