Figure 10

Simulated turbo-coded bit-error-rate performance and data throughput. Turbo-coded bit-error-rate performance (top) and data throughput (bottom) as a function of MT azimuth direction inside a 120° sector. Simulation consisted of 121 angular MT positions with 40 radio frames in each of them and it was carried out with fixed SNR of 24 dB in ITU Pedestrian B radio channel environment. BER averaging was performed over the 40 radio frames (960 OFDMA symbols) taking into account the three frequency sub-bands (RBs) with lowest BER. Data throughput was calculated as a sum all data bits in the error-free RBs. Spatial multiplexing in the beam domain showed in total 24,452 error-free RBs while the corresponding number was 13,523 RBs in the antenna domain, giving 80% data throughput gain for the beam domain scheme.