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http://dx.doi.org/10.12673/jkoni.2012.16.1.158

Study on the Improvement of OFDM/64QAM Modem  

Park, Jin-Soo (Cheongju University)
Publication Information
Journal of Advanced Navigation Technology / v.16, no.1, 2012 , pp. 158-162 More about this Journal
Abstract
In this paper, we propose a wireless modem, which used OFDM/64QAM method and the ISM band with 2.4GHz radio frequency. In this paper proposed the case of a modem, the main program to process the baseband processor, processing speed, operating voltage, and reliability should be ensured. So we have designed with Ralink's RT2870, witch was used for Wi-Fi solution. The RT2870 provides full support for wireless LAN standard, and supports various modulation formats, 2.4GHz and 5GHz bands, both of which support chip. In this paper, we also output the modulated signal transmitted wirelessly to the 2.4GHz band RF RT2850 chip processing was applied and using 40MHz band 2.422 ~ 2.462GHz wireless bands were designed to occupy. By applying bi-directional transmission between wireless transmitter and receiver, it can be effectively connected with any kinds of wireless LAN with 2.4GHz ISM band. Therefore it could economically be used as peripheral equipments for POS system or personal wireless device based on Android platform.
Keywords
OFDM; M-QAM; 64QAM; Wi-Fi; Wireless LAN;
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