The era of entirely wireless, mobile communication is rapidly approaching. Increasingly, consumers are demanding versatile and convenient modes of communication that are available whenever they want, wherever they are; all of this without losing performance and efficiency. On the other hand, the demand for high-speed broadband and technology with less energy costs are growing side-by-side. The challenge is to give consumers high-speed, high-performance, mobile, and Earth-friendly alternatives to what is currently available. The answer to these demands might just be WiMAX. Worldwide Interoperability for Microwave Access (WiMAX) is a Broadband Wireless Access (BWA) technology that offers service to individuals and groups in subchannels. In this paper we aim to analyze the performance of IEEE 802.16-2004 including the Space-Time Block Coding (STBC) model and the Multiple-Input Single-Output (MISO). We found the rate of data transmission is being increased in certain models. For instance, 64QAM 3/4 performs efficiently with specific ranges of bandwidth. WiMAX could potentially be the answer to new consumer demands that the IT world has been in search of.