Subcarrier Clustering in Adaptive Array Antenna for OFDM Systems in the Presence of Co-channel Interference(Wireless Network System Performances)(<Special Section>Wave Technologies for Wireless and Optical Communications)

スポンサーリンク

概要

• 論文の詳細を見る

• For future high-speed wireless communications using orthogonal frequency division multiplexing (OFDM), two major system requirements will emerge: throughput improvement and rich interference elimination. Because of its broadband nature and limited frequency allocations worldwide, interference from co-located wireless LAN's operating in the same frequency band will become a serious deployment issue. Adaptive array antenna can enhance the performance by suppressing the co-channel interference even when interference may have a large amount of multipath and also have similar received power to the desired signal. There are typically two types of adaptive array architecture for OFDM systems, whose signal processing is carried out before or after FFT (Fast Fourier Transform). In general, the pre-FFT array processing has low complexity, but in rich multipath and interference environments, the performance will deteriorate drastically. In contrast, the post-FFT array processing can provide the optimum performance even in such severe environments at the cost of complexity. Therefore, complexity-reduction techniques combined with the achievement of high system performance will be a key issue for adaptive array antenna applications. This paper proposes novel adaptive array architecture, which is a complexity-reduction technique using subcarrier clustering for post-FFT adaptive array. In the proposed scheme, plural subcarriers can be clustered into a group with the same spatial weight. Simulation results show that the proposed architecture is a promising candidate for real implementation, since it can achieve high performance with much lower complexity even in a rich multipath environment with low signal to noise plus interference ratio (SNIR).

• 社団法人電子情報通信学会の論文
• 2004-09-01

著者

• Matsuoka Hidehiro

  The Corporate Research & Development Center Toshiba Corporation

• SUN Yong

  the Telecommunication Research Laboratory, Toshiba Research Europe Limited

• Sun Yong

  The Telecommunication Research Laboratory Toshiba Research Europe Limited

関連論文

• Subcarrier Clustering in Adaptive Array Antenna for OFDM Systems in the Presence of Co-channel Interference(Wireless Network System Performances)(Wave Technologies for Wireless and Optical Communications)

スポンサーリンク