OFDM TRANSMISSION SYSTEM WITH SPACE-TIME BLOCK CODING TECHNOLOGY USING SWITCH

摘要

The present invention relates to an OFDM transmitting and receiving system to which a spatial/temporal code technology is applied using a switch. The OFDM transmitting and receiving system to which a spatial/temporal code technology is applied comprises: a symbol mapping unit for generating a data block; two IFFT modules for inverse Fourier transforming the symbol mapped data block; a multiplexer for multiplexing the inverse Fourier transformed data block; a protection section insertion unit for adding a protection section to the data block received from the multiplexer; a digital-analog conversion unit for converting the data block to which the protection section is added to an analog signal; a first radio signal conversion unit for converting the analog signal of a basic band to a radio signal; two transmission antennas for transmitting the radio signal to the outside; a transmitter including a switch for generating a switching signal; a reception antenna for receiving the radio signal; a second radio signal conversion unit for converting the radio signal to the analog signal of the basic band; an analog-digital conversion unit for converting the analog signal to the data block of a digital signal; a wrapping around addition unit for performing a wrapping around addition calculation of the data block; a Fourier transformation unit for Fourier transforming the data block; a channel estimation unit for estimating a channel value of the data block; a maximum yield reception combination unit for performing a maximum yield reception combination with a spatial/temporal block code to obtain a diversity gain; and a data determination unit for determining the data block. [Reference numerals] (10) Transmitter; (110) Input bit generation unit; (120) Symbol mapping unit; (130) First IFFT module; (131) Second IFFT module; (140) Multiplexer; (150) Protection section insertion unit; (160) D/A conversion unit; (170) First radio signal conversion unit; (180) First transmission antenna; (181) Second transmission antenna; (190) Switch; (20) Receiver; (210) Reception antenna; (220) Second radio signal conversion unit; (230) A/D conversion unit; (240) Wrapping around addition unit; (250) Fourier transformation unit; (260) Channel estimation unit; (270) Maximum yield reception combination unit; (280) Data determination unit