Implement Wavelet Packet Transform-based Multicarrier Modulation System Based On FPGA

FPGA(Field-Programmable Gate Array) is playing more and more important part in modern digital circuit design. FPGA is necessary in simple interface circuit design and complex statemachine design, even in"System On Chip"design. FPGA's characteristics of static state reprogrammable and dynamic rebuild on system enable the hardware function can change like the software by program. Then the flexible characteristic and general characteristic of electron system design were improved, the time of coming into the market was shortened and the cost of exploitation was reduced. Therefore, this task is researching on realization of Wavelet Packet Multi-carrier modulation system based on FPGA.Wireless mobile communication provides a more efficient way of message transmission for moving subscribers, with flexibility in both time and space. However, the complex wireless channels and limited frequency spectrum source put forward stricter requirement to the wireless transmission. The select and design of wireless modulation/demodulation plays an important role in bettering wireless mobile communication performances. CDMA, widely employed in the third generation wireless communication system, however, could not meet the increasing needs of high-quality video and multimedia services. The forth generation prefers to using multicarrier modulation technique in order to provide the wide-band, high-speed rate services. As a result, multicarrier modulation technique became a hotspot in these years.The analysis of the experiment results indicates that the software implementation scheme of this system is qualified to accomplish the task of WPT-MCM. It also proves the WPT-MCM has unique advantage and great potential and worth of further researching.