Wireless phone users have all experienced patchy reception. Radio reception disturbances are caused by the radio waves reflecting from different objects in the environment, such as buildings, creating multipath fading. In the past, radio channel sounders could record only narrowband fading characteristics. They were limited in the number of channels and the maximum transmissible data rates--vital parameters particularly in the development of smart antenna and multiple-input/multiple-output (MIMO) systems.
Elektrobit Testing Ltd. used MathWorks tools to develop the Propsound™CS, a high-resolution multidimensional radio channel measurement system that detects and analyzes the propagation of radio waves in both time and space. Propsound™CS includes a MATLAB application that enables end users to compute and display all relevant radio channel parameters in real time. The gathered radio channel information can be used for propagation analysis, channel modeling for system simulations, and Propsim radio channel emulators, which enable end users to test the target application in a laboratory against known, realistic, and fully repetitive radio channel conditions.
"Using MATLAB and Simulink as an integral part of the channel sounder, we have extended our technological lead," says Jukka-Pekka Nuutinen, research manager at Elektrobit Testing Ltd. "We could not have done that without these tools."