Performance Analysis of Two-User Cooperation Diversity

User cooperation is a method where single antenna users or mobile phones share their antennas with other users or mobile phones so that they create space diversity and combat the effect of fading. In this paper, we derive, in closed form, the end to end symbol error probability when two users cooperate through the decode and forward protocol with binary phase-shift keying in a flat Rayleigh fading environment. Results show that cooperative diversity becomes effective for a larger range of average signal-to-noise ratio (SNR) of the user to destination link as the average SNR of the interuser link increases.