The research laboratories of the Siemens Communications Group set a world record for mobile transmission capacity by transferring real time data at the rate of 1 Gbps (1,000 megabits per second), To achieve its record-setting high speed, Siemens combined an “intelligent antenna system” consisting of three transmitting and four receiving antennas with Orthogonal Frequency Division Multiplexing (OFDM). Multiple antennas simultaneously transmit different flows of data over one and the same radio channel and frequency band. The experimental system operates in the 5-GHz band and has a bandwidth of 100 MHz. The OFDM transmission protects the signals against most types of interference, such as the echoes that are produced when the signals reflect off buildings.
Siemens said the technology is highly promising for future mobile communication. By the year 2015, the need for transmission capacities for voice, data, image and multimedia is conservatively anticipated to rise by a factor of 10.
The Siemens research team is already working on further increasing the data rate and enhancing the mobility of devices equipped with multiple antennas. http://www.siemens.com/communications
