AM) Users Figure 4.17 Throughput measurements in downlink 4.5.1.1.4 Applications Testing Due to absence of QoS at the time of testing we evaluated VoIP, Video Streaming, email functionality and Interactive gaming in the best effort mode. At the same time typical best effort applications like web browsing and FTP were also tested. Several VoIP call scenarios were tested including WiMAX CPE to WiMAX PCMCIA and vice versa, GSM to WiMAX, and vice versa. The public safety dialing and international calling were also validated. The VoIP call quality as perceived by the user was satisfactory comparable to toll quality voice and speech phrases were understandable. A maximum of ten calls were either placed or received on a single sector and the voice quality was satisfactory for all the calls. The performance of video streaming and email were measured using video and email servers connected to the CSN. Multiple users were either using the email functionality or performing video streaming in Sector Throughput RSSI (dbm) Figure 4.18 Embedded sector capacity results in downlink IEEE WiMAX the stationary mode. The performance and quality of both applications were satisfactory and throughputs were similar to the ones listed in the capacity test cases. 4.5.2 Published WiMAX Lab Results This section will briefly highlight some of the published lab results on WiMAX performance. 4.5.2.1 Uplink MIMO The UL-MIMO (Matrix A, Matrix B) techniques provide the following gains on the uplink link budget (based on ITU PedB) [13]: 3 dB combining gain. 3 dB fading margin gain for STC Matrix A. These performance gains can be translated to reduce transmit power at the mobile station by enabling dual-transmit terminals to transmit at a lower power, while maintaining performance equivalent to single transmit terminals. These gains can also be used to increase coverage; a 6 dB link budget translates to a 41% cell radius increase and a 99% cell area increase. 4.5.2.2 VoIP over Mobile WiMAX In [14] the authors used a system simulator based on the mob