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WLAN 802.11n combines MIMO and OFDM to provide high throughput and performance wireless communications. High quality MIMO decoder is urgently required. The existing WLAN 802.11n devices implement linear method, i.e. Zero Forcing (ZF) and Minimum Mean Square Error (MMSE) as MIMO decoder. Both methods are simple but low in performance. At the other side, non-linear but optimal method Maximum Likelihood...
This paper presents our research in developing high performance but low complexity MIMO decoders for the newest WLAN, i.e. 802.11ac. K-best and Trellis methods are proposed to develop the MIMO decoders. Their performances are observed and compared to MIMO decoders which are based on linear and optimal methods, i.e. ZF, MMSE, and ML. Run test of 2×2 MEMO, 64-QAM, Coding rate 3/4, and 40MHz of bandwidth...
Exponential growing of wireless multimedia communications has forced the IEEE802.11 workgroup to define new standard of WLAN. It is named a Very High Throughput WLAN IEEE 802.11ac which exploits MIMO-OFDM technology to provide up to 6,9Gbps of throughput. MIMO decoder is the vital part of WLAN 802.11ac. It decodes the received signals to get back the transmitted information. There are many methods...
The high throughput WLAN 802.11n exploits Multiple Input Multiple Output antenna to provide high throughput and high performance. It transmits the data into spatial streams to be more robust to multipath fading propagation environment. In this paper the performance of WLAN 802.11n is investigated by combining receiver diversity technique and antenna spacing on both transmitter and receiver. Configuration...
In UAV flight controller's design, the occurrence of errors due to the delay in the system response to the reference signal from the pilot and the lack of stability in flat conditions due to interference or unbalanced mechanical load. When this happens UAV can not be controlled and the flight conditions can not be maintained any more. Fuzzy controller offers a solution for the development of UAV's...
WLAN IEEE 802.11n is recent wireless data communication technology which provides high throughput and high performance. These features are definitely determined by the strength of MIMO decoder. The existing MIMO decoder of WLAN 802.11n is based on linear method, i.e Zero Forcing (ZF) and Minimum Mean Square Error (MMSE). Both of them are low in complexity but poor in performance. In the other hand...
Welcome to 2014 1st International Conference on Information Technology, Computer, And Electrical Engineering (ICITACEE) held in Semarang, the capital city of Central Java! This conference provides a forum for researchers, academicians, professionals, and students from various engineering backgrounds and also from cross- disciplinary research in the development and the design of Information Technology...
We have been developing a very high throughput WLAN system based on IEEE802.11ac's criteria. It combines MIMO and OFDM technology to provide throughput over 1 Gbps for 150 feet propagation distance by using 80MHz of bandiwdth on 5GHz frequency band. 4 by 5 antennas MIMO is set to get 2nd-order diversity gain to maintain high throughput and performance. Greenfield preamble with novel phase rotation...
This paper deals with a design of next generation Gigabit WLAN system based on IEEE802.11TGac's functional requirements. It achieves 1.1 Gbps throughput for 45 meter propagation distance with 80 MHz bandwidth on 5 GHz band. The proposed preamble ensures backward compatibility with the IEEE802.11a/n systems and has lower PAPR and comparable preamble efficiency with IEEE802.11n's preamble. It uses MIMO...
This paper deals with our work in designing a 1.2 Gbps WLAN system. It reaches 33 meter propagation distance by using 80 MHz bandwidth on 5 GHz band. The proposed preamble has backward compatibility with IEEE802.11n system, allows band sharing and avoids collision within 5 GHz band. The proposed preamble has comparable PAPR and preamble efficiency with IEEE802.11n system. The 4 ?? 5 MIMO configuration...
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